The mechanic says it's leaking 1 drop of oil every 15 seconds from rear main seal where the chrome oil pan connects. The 2 pc. 305. 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. Aluminum Pontiac Super Duty version of Gen.I SBC 4.00" bore 350 mains 2-piece rear seal splayed caps GTP race block. My first video....Two piece rear main seal replacement on my 1971 Corvette. rear main seal. 4. How do you know if the 1985 Chevy Blazer K5 305 is a 2 piece rear main seal or 1 piece? 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? All the way up through 1985 Chevy used a two piece rear main seal design. 350 . How do you think about the answers? Billet aluminum adapter is machined to accept the factory oil pan seal, instead of having to fill up the adapter with silicone. Goodwrench crate motor 2-piece rear seal "Hecho en Mexico" 10046164. The seal for these engines are completely different and will not interchange. I had it installed and it fired right up and runs great. 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. 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. 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 84. 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 6 lug C2500 are 7100 lbs. Page. Get your answers by asking now. 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. The rear main seal is what seals the tail end of the crankshaft so that … Or he says if they did, it should have dried out from sitting for 2 years. 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. Get your answers by asking now. Bore, Raised Cam, 2-Piece Rear Main Seal, Chevy, Small Block, Each Part Number: WRL-084125RC Not Yet Reviewed Does it matter what brand of tyres you put on your car? 33-48 of 359 results for "chevy 350 rear main seal" Skip to main search results Eligible for Free Shipping. 10051184 . Still have questions? 1987-02 chevy gen 1 small block 1 pc. Cranks are different on the backside for the seal. crankshaft is ready to install. 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 … I don't believe in offsetting the seal ends though. out of the way IME. $2,247.95. The crankshaft is also diff between the 1 pc and 2 pc seal engines, I don't see any mention of the gvw? The big block Chevy engine uses a two-piece rear main seal through 1985. Order ships free when this item is included and exceeds $99. The cost of over-sized pistons and rings are the same for standard parts. No start after fuel injector change. 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. 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 … 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). 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. Mechanic put wrong transmission fluid in my car!!? all oil passages are radiused and journals are micro-polished. the crankshaft is different, the block is different, and the oil pan is different. Includes fasteners, and … 1955-86 chevy small block v8's 2 pc. 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. Do you really need to heat up your engine in the winter before you start driving? Chevy 305 Engine Rear Main Seal Replacement. The 2 pc. Felpro Rear Main Seal kit -- a double offset lip seal Part no. If this engine has a lot of miles, you should have it bored too. 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… You will need to take the block to a reputable machine shop to have it tanked and to have the cylinders honed. This means that half of the seal is on the rear main bearing cap and the other half is on the engine. Will either one work on any 350 engine? In 2022, what will your car need to make your car go? Rear Main Seal Adapter, 1 Piece Block to 2 Piece Crank, 1955-86 Pan, Billet Aluminum, Small Block Chevy, Kit. It will come with all the parts you will need to re-build the bottom end, including gaskets. You can sign in to vote the answer. This is not the original engine. FREE Shipping. The Chevy small block went from a 2 piece rear main seal to a 1 piece rear main seal in 1987. You can sign in to vote the answer. Where/what exactly does this represent in the engine? 4. Engine Block #4500219 350 SBC, 1-Pc Rear Main Seal, Wet Block, Splayed Mains. The adapter from Enginequest is a two-piece design, and uses a conventional small-block Chevy split rear main seal. I don't know if it has a 2 piece rear main seal or a 1 piece seal… 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. In 2022, what will your car need to make your car go? may i make a suggestion? on a 350 it should be a 2 piece. 10051182 . How do I get my crypto currency’s to auto deposit without my input ? 1986-up SBC is one-piece. 10049804 . may be picked up at our facility or shipped to you fed-ex for an additional fee. Is it worth paying more than double for a set of tires to have high end Michelin’s? Why did they remove the manual choke from cars? « He thinks whoever rebuilt the motor did not scrape off the chrome from the oil pan before installing. BS11829-1 (fits 1959-1985) And a Oil pan gasket kit --- your choice -- one piece or a 4 piece cork whatever -- your preference. 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. What is the alternative to spinning your wheels. 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. 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? Do you really need to heat up your engine in the winter before you start driving? $38.84 $ 38. I have a 383 stroker. I have a GMC with a 350CI small block Chevy engine. 4. 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. We used a Parragon reproduction gasket set. 4500219. 44 The main rear seal is the engine oil protection located between the engine block and the crankshaft outlet extension. Engine Block, Cast Iron, 350 Mains, Billet Main Caps, 4.120 in. the 1 piece seal is found on 87 &up gm v8's. Keep in mind, if it isn't done right, you're building a nice boat anchor. the long and short of it is, there's quite a bit more to building an engine than just swapping out parts. ALL26125 by ALLSTAR PERFORMANCE. 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. 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? I was offered a used 350. I was offered a used 350. The one piece rear had a seal that is one piece. The one piece goes on over the back of the crank shaft to replace it. Starting in 1986 they changed to a one piece. They were the same though-out the run. 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. 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. Motor did not scrape off the chrome oil pan before installing the Block to a one piece fits. Reconditioned as well a particular type that will not interchange to fail will be nearly the same for parts! 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