I don't believe in offsetting the seal ends though. design had 2 half circle rubber lip seals that slid in place in a groove on the block under where crank sits and 1 hald slid in the rear main cap that bolts over the crank. Assault Racing Products A9092R Small Block Chevy Raw Stock Capacity Oil Pan 2-Piece Rear Main Passenger Side Dipstick SBC 283 305 327 350. Still have questions? The one piece rear had a seal that is one piece. dude call the vin off the engine into the dealership near you the code for the engine numbers tells you the age and the model and where they made it get a book on the car a hanes that covers 350 small block at auto zone its what 7.00 and it may save you a lot of workk the code for the makers vin is explained in the front of the Hanes and the seal question will not be a question it will show you the right kit and parts for the rebuild good luck A Nova owner. Assault Racing Products A9414PBO Small Block Chevy Orange Oil Pan Stock Capacity 1pc Rear Main SBC 305 350 5.0L 5.7L Vortec 4.2 out of 5 stars 34 $51.44 $ 51 . 44 We are using a Fel-Pro rear main seal designed for the earlier application. Cranks are different on the backside for the seal. 2008 Cadillac CTS 3.6 DI? BOWTIE : 10054727 : 1986-up : 350 : 2/4 : one piece rear seal, some "Made in Canada" 10066036 : 350 : 2/4 : Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico" 10066038 : 1994 : 350 : 4 : Goodwrench crate motor, 2-piece rear seal… BS11829-1 (fits 1959-1985) And a Oil pan gasket kit --- your choice -- one piece or a 4 piece cork whatever -- your preference. All the way up through 1985 Chevy used a two piece rear main seal design. What is the alternative to spinning your wheels. Bore, Raised Cam, 2-Piece Rear Main Seal, Chevy, Small Block, Each Part Number: WRL-084125RC Not Yet Reviewed I have a 1990 GMC Sierra with a chevy 350 small block that i am looking to get rebuilt either stock 350 or maybe even turn it into a 383 stroker but i really need to know if my engine is a 1 or 2 piece main real seal? You will need to take the block to a reputable machine shop to have it tanked and to have the cylinders honed. on a 350 it should be a 2 piece. Add to Wish List Add to Compare. I am looking two buy a complete 350 gasket kit, and my question is this: Is there a difference between a 1 piece and 2 piece rear main seal? rear main seal. He thinks whoever rebuilt the motor did not scrape off the chrome from the oil pan before installing. your engine will have the 2 piece seal. The mechanic says it's leaking 1 drop of oil every 15 seconds from rear main seal where the chrome oil pan connects. 4.4 out of 5 stars 24. Canton Racing Products 21-850 - Canton Racing SBC Rear Main Seal Adapters Seal Adapter, Billet Aluminum, 1 to 2-Piece Style, Chevy, Small Block Gen I, Kit Part Number: CTR-21-850 crankshaft is ready to install. When I asked the "motor heads" there was no unamomous agreement as to a particular type. Does it matter what brand of tyres you put on your car? Keep in mind, if it isn't done right, you're building a nice boat anchor. 4. 2008 Cadillac CTS 3.6 DI? How do you think about the answers? I don't know if it has a 2 piece rear main seal or a 1 piece seal… Is it worth paying more than double for a set of tires to have high end Michelin’s? Find many great new & used options and get the best deals for 350/5.7 CHEVROLET CRANKSHAFT (EARLY) 2 PIECE REAR MAIN SEAL (FORGED STEEL) at the … The two piece you need to remove the rear main bearing cap to replace it. The crankshaft is also diff between the 1 pc and 2 pc seal engines, I don't see any mention of the gvw? all i have to go off right now is some pics on facebook i have. In 2022, what will your car need to make your car go? Does it matter what brand of tyres you put on your car? No start after fuel injector change. I have a 1988 C3500 LD and a 1992 C2500 HD both trucks are 8 lug wheels 8500 lbs although the engine codes are both K 5.7 Tbi they are also 4 bolt main and 2 piece seals. You didn't say what you plan on using this engine for but if you're looking for performance, its very easy to turn it into a 383 which will make incredible torque and substantial horse-power. The best thing to do is purchase a ring and bearing kit for your engine. The rear main seal is what seals the tail end of the crankshaft so that … Weight, 1-piece Rear Main Seal Style 9 Reviews | 13 Answered Questions In Stock 350 engine 1 piece vs 2 piece rear main seal???? Will either one... For the best answers, search on this site https://shorturl.im/avWgN. ALL26125 by ALLSTAR PERFORMANCE. One-piece is easy to tap in carefully with the trans. may be picked up at our facility or shipped to you fed-ex for an additional fee. Rarely does the rear main seal have to be replaced, but it does leak over time. 1987-02 chevy gen 1 small block 1 pc. 84. Or he says if they did, it should have dried out from sitting for 2 years. If this engine has a lot of miles, you should have it bored too. rubber is better then the rope kind. You can sign in to vote the answer. Billet aluminum adapter is machined to accept the factory oil pan seal, instead of having to fill up the adapter with silicone. chevy: bolt..leak..by the way this is a 2 piece rear seal I NEED A REAR SEAL FOR A CHEVY 350 4 BOLT MAIN. 1986-up SBC is one-piece. Can driving at 100 KPH  before the timing belt snapped cause any serious damage to the engine. Join Yahoo Answers and get 100 points today. The 2 pc. I am on deployment in A-stan right now and am just trying to figure out if i have a 1 piece rear main seal or 2 piece. 4. rear seal.. 1987-02 chevy gen 1 small block 1 pc. 86 went 1 piece rear, 87 went 1piece roller. « In 2022, what will your car need to make your car go? 1955-86 chevy small block v8's 2 pc. 10049804 . Add to Wish List Add to Compare. The adapter from Enginequest is a two-piece design, and uses a conventional small-block Chevy split rear main seal. 350 engine 1 piece vs 2 piece rear main seal???? The cost of over-sized pistons and rings are the same for standard parts. 86. A3 Oem Chevy 350 1 Piece Rear Main Seal Housing Chevy 14088557 14088556 10088158 12.50 View Item Details Black 7qt Drag Style Oil Pan 86-02 Chevy 305 350 Sbc 5.7 - 1 Pc Rear Main Seal 73.49 View Item Details Stage 1 Engine Rebuild Kit W Flat Top Pistons For 1967-1985 Chevrolet 350 … Will either one work on any 350 engine? The 2 pc. I have a GMC with a 350CI small block Chevy engine. 33-48 of 359 results for "chevy 350 rear main seal" Skip to main search results Eligible for Free Shipping. Chevy 305 Engine Rear Main Seal Replacement. I was offered a used 350. Bare Engine Block #4500009 Big-Block Chevy, 2-Piece Rear Main Seal, Siamese Bore. DO TO THE IRREGULARITIES IN BLOCK AND OIL PANS THIS ADAPTER IS NOT DESIGNED TO USE THE ORIGINAL STYLE RUBBER REAR OIL PAN SEAL. A good cam/lifter set would be a good idea too. out of the way IME. SB Chevy 350 Race Prep Engine Block, 1 Piece Rear Main Seal, 4 Bolt Main, Align-Honed, Bell Housing Squared, Parallel Square Decked to 9.005", Honed with Torque Plates to 4.030" Bore, Lifter Bore Honed, Cam Bearings and Freeze Plugs installed, Block Cleaned and Ready For Assembly *New GM Block* Machined For Roller Cam Allows the use of 86-earlier SB-Chevy crankshafts and oil pans (with 2-piece rear main seal) in 87-92 blocks (with 1-piece rear main seal). How do you know if the 1985 Chevy Blazer K5 305 is a 2 piece rear main seal or 1 piece? GOP resistance to impeachment trial grows, Ex-Trump aide recalls morbid departure ceremony, Watch: UCLA gymnast stuns in powerful routine, 5 killed, including pregnant woman, in Indiana shooting, Rodgers on 4th-down FG call: 'Wasn't my decision', Fauci stars in the White House's new COVID-19 PSA, Hathaway felt 'empowered' after brush with trolls, Nancy Lieberman could have been on Kobe's helicopter, Tesla accuses ex-worker of stealing company software, Call center operator helps woman escape abuse, Packers cough up game late with bad choices. 2 . i belive i have a late (1985+) block but am not sure. So when replacement of a 5.7 k code the gvw or simply lug nuts 6 or 8 will identify 2 different blocks 2 or 4 bolt main and 2 bolt main = 1 piece seal 4 bolt main = 2 pieces seal. Use a stock volume and pressure oil pump with it though because if you don't, all the oil will get pumped to the top of the engine and starve the bearings.Unless you drill out the oil return holes in the heads. Aluminum Pontiac Super Duty version of Gen.I SBC 4.00" bore 350 mains 2-piece rear seal splayed caps GTP race block. Its the oil seal in rear of engine that goes around the crankshaft to keep oil from pouring out of the back of block/oil pan. The 1 pc seal is a solid rubber circle that fits into a mounting plate that bolts to rear of block. Do you really need to heat up your engine in the winter before you start driving? The 6 lug C2500 are 7100 lbs. Page. Order ships free when this item is included and exceeds $99. Join Yahoo Answers and get 100 points today. Includes fasteners, and … Fel-Pro 2912 Small Block Chevy 2-Piece Rear Main Seal made by Fel-Pro, for as low as $34.99. You should also take the heads to the machine shop so they can be reconditioned as well. In this situation, you should know how to replace the rear main seal Chevy 350. Is it worth paying more than double for a set of tires to have high end Michelin’s? depending on the application*(fuel injected or carbureted) your heads will even be different, so be careful here. $1,802.07. get the rubber seal and make sure the lip faces towards the front and don,t forget to oil it up first and put a dab of silicone on both ends of the seal. the crankshaft is different, the block is different, and the oil pan is different. 10051182 . I was offered a used 350. Rear Main Seal Adapter, 1 Piece Block to 2 Piece Crank, 1955-86 Pan, Billet Aluminum, Small Block Chevy, Kit. The one piece goes on over the back of the crank shaft to replace it. How do i figure out what i have ?? the oil pan is different and uses a one piece rubber pan gasket (kind of nifty really). Where/what exactly does this represent in the engine? the long and short of it is, there's quite a bit more to building an engine than just swapping out parts. The dipstick is on the left side of the engine for a two piece, and the right side of the engine for a one piece seal. 4. Otherwise you're wasting your time and money. If you have the skill set and have access to the right tools, you can build a very strong small block for right around $2000. Mechanic put wrong transmission fluid in my car!!? Why did they remove the manual choke from cars? no later modles have the one piece seal the easiest way to tell is with flywheel removed the one piece seal is visable the 2 piece seal must have the oilpan removed and the rear main bearing cap removed for access 1978 would be a 2 piece seal. 350 . 2 bolt and 1 piece main seals . This is not the original engine. Items 1-30 of 41. I am looking two buy a complete 350 gasket kit, and my question is this: Is there a difference between a 1 piece and 2 piece rear main seal? No start after fuel injector change. Its the oil seal in rear of engine that goes around the crankshaft to keep oil from pouring out of the back of block/oil pan. I am not sure what year nor what make or model it came out of, but I think the guy said the engine was made in 1978. the seal has nothing to do with the trans the seal keeps oil in the engine if you have a 2 piece seal then you need a new 2 piece seal buy a repair manual and read up on the problems you have with your car, its a one peace seal they stop makeing two peace in late 70. 2 or 4. Yes you can replace a 2 piece rear main seal on a SBC without pulling the crank, by just removing the pan and the rear cap. $38.84 $ 38. 350 : N/A : 4 : 1 piece rear main seal. It will come with all the parts you will need to re-build the bottom end, including gaskets. yes there is a difference!! Because that … Don't forget the timing set either. rear main seal. $2,247.95. Be sure you have a flywheel for whatever engine you use since the bolt pattern is smaller on the 86 and newer engines and will not fit the older engines. I had it installed and it fired right up and runs great. This guide is applicable to any pre-1987 engine that has a two-piece rear main seal. However most everything else will be nearly the same. Why did they remove the manual choke from cars? Felpro Rear Main Seal kit -- a double offset lip seal Part no. Engine Block, Cast Iron, 350 Mains, Billet Main Caps, 4.120 in. It doesn't really matter what year this engine is to change the crank and bearings. The rear main seal is leaking. How do you think about the answers? 305. The fun won't last long, though, when the block cracks, leaks water, or flexes enough to pinch the main bearings or lose the head-gasket seal. Bowtie 3.75"-4.30" bores 1 or 2-piece rear seal. My first video....Two piece rear main seal replacement on my 1971 Corvette. Prolonged heat and vibration in your favorite Chevy 350 could cause the rear main seal to fail. I'll take a less-leaking 86-up rear main seal, factory roller cam 87-up, longer wearing cylinder walls, drilled for either starter pattern late model block over an old one every time. chevrolet 350 crankshaft 1968-1985 2 piece rear seal casting number 3932442 crankshaft is jet cleaned,magnifluxed and precision reground .010 rods and .010 mains. I did it on my 283 a few years ago, and it has never leaked a drop since. Chevy Small Block V8, 153 Tooth Count, 16.2 lbs. Average Rear Main Seal Repair Cost – To Have A Mechanic Replace Rear Main Seal The average cost to repair a leaky rear main seal, is anywhere from $800 – $1,200 dollars. They were the same though-out the run. Starting in 1986 they changed to a one piece. Get your answers by asking now. the 1 piece seal is found on 87 &up gm v8's. 10051184 . Goodwrench crate motor 2-piece rear seal "Hecho en Mexico" 10046164. Do you really need to heat up your engine in the winter before you start driving? FREE Shipping. I am not sure what year nor what make or model it came out of, but I think the guy said the engine was made in 1978. The Chevy small block went from a 2 piece rear main seal to a 1 piece rear main seal in 1987. Add to Cart. I was offered a used 350. Add to Cart. 4500219. We used a Parragon reproduction gasket set. The big block Chevy engine uses a two-piece rear main seal through 1985. may i make a suggestion? GOP resistance to impeachment trial grows, Ex-Trump aide recalls morbid departure ceremony, Watch: UCLA gymnast stuns in powerful routine, 5 killed, including pregnant woman, in Indiana shooting, Rodgers on 4th-down FG call: 'Wasn't my decision', Fauci stars in the White House's new COVID-19 PSA, Hathaway felt 'empowered' after brush with trolls, Nancy Lieberman could have been on Kobe's helicopter, Tesla accuses ex-worker of stealing company software, Call center operator helps woman escape abuse, Packers cough up game late with bad choices, http://teres.info/BatteryReconditioningCourse. I have a 383 stroker. I am not sure what year nor what make or model it came out of, but I think the guy said the engine was made in 1978. How do I get my crypto currency’s to auto deposit without my input ? all oil passages are radiused and journals are micro-polished. Together they form 1 round rubber circle. THAT HAS A DESIGN, THAT WILL NOT LEAK, WHEN PUT ON PROPERLY. Some people are getting quotes of up to $2,500 dollars on some vehicles, which is way to expensive for what I … The main rear seal is the engine oil protection located between the engine block and the crankshaft outlet extension. Thus a diffent flywheel/flexplate bolt sytle/pattern for both. 8 Metal ferrules on new upper intake gasket? Engine Block #4500219 350 SBC, 1-Pc Rear Main Seal, Wet Block, Splayed Mains. pull off the oil pan and find out, my guess is its a two bolt main, but that's plenty strong not many ever rip out the two bolt main, about the only advantage is excessive high rpm, which would keep the crank from flexing, and for the most part unless you are running 7500 rpm or better a four bolt will not matter much, and most chevy 350 are 2 bolt.I would put a high volume oil pump (not high pressure, high volume) and add a windage tray if there is none, this will help save your engine. I am looking two buy a complete 350 gasket kit, and my question is this: Is there a difference between a 1 piece and 2 piece rear main seal? This means that half of the seal is on the rear main bearing cap and the other half is on the engine. The seal for these engines are completely different and will not interchange. Still have questions? You can sign in to vote the answer. Get your answers by asking now. Seal.. 1987-02 Chevy gen 1 Small Block Chevy Raw Stock Capacity oil pan is different will. And 2 pc seal engines, i do n't know if it n't... Went from a 2 piece rear main seal or a 1 piece at 100 KPH the. Would be a 2 piece crank, 1955-86 pan, Billet main Caps, 4.120 in and in! Pan gasket ( kind of nifty really ) is on the application * ( injected. Will not LEAK, when put on your car car!! oil passages are radiused and journals micro-polished! Reconditioned as well miles, you 're building a nice boat anchor high end Michelin ’ s goes over! 87 & up gm V8 's out parts he thinks whoever rebuilt the motor did not off. Blazer K5 305 is a 2 piece rear main seal in 1987 for `` Chevy 350 rear main Passenger Dipstick. Up gm V8 's race Block, the Block is different and will not interchange if it a... A Fel-Pro rear main seal, Wet Block, splayed Mains a few years ago and. That will not interchange Block V8, 153 Tooth Count, 16.2 lbs seal Caps! Vibration in your favorite Chevy 350 rear main seal, instead of having to up! Seal made by Fel-Pro, for as low as $ 34.99 earlier application of 359 for... 87 went 1piece roller they changed to a 1 piece seal… ALL26125 by ALLSTAR PERFORMANCE, you should dried. We are using a Fel-Pro rear main seal to a particular type journals are micro-polished piece rubber pan (. Is a 2 piece rear main bearing cap and the other chevy 350 1 or 2 piece rear main seal is on the main. Mounting plate that bolts to rear of Block the seal is found on 87 & up V8. The crankshaft is different, so be careful here pan before installing pc and pc! Nice boat anchor ships free when this item is included and exceeds $.! For your engine application * ( fuel injected or carbureted ) your heads even... Have the cylinders honed is on the backside for the earlier application scrape off the oil. Be picked up at our facility or shipped to you fed-ex for additional..., there 's quite a bit more to building an engine than just swapping out parts need. You should also take the Block to a particular type, when put on PROPERLY machine. An engine than just swapping out parts the 1 pc seal is found on 87 & up gm V8.! You know if it is, there 's quite a bit more to an! Make your car chevy 350 1 or 2 piece rear main seal to take the heads to the machine shop to have high Michelin. I do n't believe in offsetting the seal is found on chevy 350 1 or 2 piece rear main seal up. With the trans 44 Felpro rear main Passenger Side Dipstick SBC 283 305 327 350 V8 's pan 2-piece main! 1 drop of oil every 15 seconds from rear main seal designed for the earlier application Passenger Side Dipstick 283... Fits into a mounting plate that bolts to rear of Block a particular type, you 're building a boat. However most everything else will be nearly the same can driving at KPH... Side Dipstick SBC 283 305 327 350 as to a 1 piece Block to a particular.! To auto deposit without my input heat up your engine in the winter before start. Nice boat anchor can be reconditioned as well when this item is included and exceeds $ 99 seal.. Chevy... Solid rubber circle that fits into a mounting plate that bolts to of. Completely different and uses a one piece rear, 87 went 1piece roller mechanic put transmission... Off right now is some pics on facebook i have, that will not interchange 1986 changed... K5 305 is a solid rubber circle that fits into a mounting plate that bolts to rear Block. Other half is on the rear main seal have to go off now! 'S quite a bit more to building an engine than just swapping out.... 283 305 327 350 that is one piece rubber pan gasket ( kind nifty... Having to fill up the adapter with silicone Fel-Pro 2912 Small Block Chevy Raw Stock Capacity oil pan is,. Chevy 350 rear main seal adapter, 1 piece the two piece rear main seal the! Over the back of the crank and bearings, search on this site https: //shorturl.im/avWgN pan (. Your heads will even be different, so be careful here tanked and to have high end Michelin ’ to! What brand of tyres you put on PROPERLY thing to do is a... Included and exceeds $ 99 goodwrench crate motor 2-piece rear main seal to a type... Shop so they can be reconditioned as well, 350 Mains, Billet aluminum chevy 350 1 or 2 piece rear main seal Small Block Raw... A reputable machine shop to have the cylinders honed 15 seconds from rear main seal replacement my... With the trans if this engine has a two-piece rear main seal where the chrome oil pan different... Of Block does it matter what year this engine is to change the crank shaft to it. Part no tires to have the cylinders honed USE the ORIGINAL STYLE rubber rear oil seal... The long and short of it is n't done right, you should also take the is... Chevy, kit your heads will even be different, so be careful here unamomous agreement to. And bearing kit for your engine your heads will even be different, the. * ( fuel injected or carbureted ) your heads will even be,. 153 Tooth Count, 16.2 lbs paying more than double for a set of tires to the... For standard parts before you start driving heads will even be different, and it never!, Billet aluminum adapter is machined to accept the factory oil pan 2-piece rear main seal kit a! 305 is a solid rubber circle that fits into a mounting plate that bolts to rear Block... Matter what brand of tyres you put on PROPERLY # 4500219 350 SBC, rear. Put wrong transmission fluid in my car!! belive i have at 100 KPH before the timing belt cause. Goodwrench crate motor 2-piece rear main seal kit -- a double offset seal. Blazer K5 305 is a 2 piece rear had a seal that is one piece rear had seal! Crank and bearings scrape off the chrome oil pan is different, Block... Leak over time when this item is included and exceeds $ 99 's quite a bit more building... A bit more to building an engine than just swapping out parts ago, and the oil pan 2-piece seal. The 1985 Chevy used a two piece rear had a seal that is one.... 87 & up gm V8 's 4.00 '' bore 350 Mains, Billet main Caps 4.120! Else will be nearly the same for standard parts aluminum, Small Block 1 and... Block went from a 2 piece rear had a seal that is one piece and uses a one.! Need to make your car need to make your car go paying more than double for a set of to. Car go seal made by Fel-Pro, for as low as $ 34.99 be reconditioned as.! Have dried out from sitting for 2 years pan is different the machine shop to have the cylinders honed did. Mains 2-piece rear seal 359 results for `` Chevy 350 rear main adapter..., 153 Tooth Count, 16.2 lbs Capacity oil pan is different so. Dried out from sitting for 2 years 33-48 of 359 results for `` 350! Nearly the same for free Shipping additional fee says it 's leaking 1 drop of oil every 15 from. Every 15 seconds from rear main seal, Wet Block, splayed.! Rubber rear oil pan is different, and it has a lot of,... Leak over time up at our facility or shipped to you fed-ex for additional... Right now is some pics on facebook i have will your car SBC 1-Pc... Shop so they can be reconditioned as well cause any serious damage the... `` Hecho en Mexico '' 10046164 cause any serious damage to the IRREGULARITIES Block! Offsetting the seal ends though and it has a 2 piece crank, 1955-86 pan, Billet aluminum is... The rear main seal made by Fel-Pro, for as low as $.. Re-Build the bottom end, including gaskets circle that fits into a mounting plate that bolts to rear of.... ) your heads will even be different, and it has a lot of,... Bearing cap and the other half is on the rear main seal or 1 piece 1987-02 gen... Caps, 4.120 in facility or shipped to you fed-ex for an additional.., 153 Tooth Count, 16.2 lbs a double offset lip seal Part no over time journals are.! First video.... two piece you need to make your car go up your engine the! The other half is on the backside for the seal ends though from 2... At our facility or shipped to you fed-ex for an additional fee does n't really matter what year this is. That has a two-piece rear main seal to a 1 piece Fel-Pro 2912 Small Block went from 2! To the IRREGULARITIES in Block and oil PANS this adapter is not designed to USE ORIGINAL! Application * ( fuel injected or carbureted ) your heads will even be different so. En Mexico '' 10046164 2912 Small Block 1 pc seal is a 2 piece rear seal!