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Anonymous
Anonymous Posted on Sep 05, 2012
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Rear main crankshaft seal on 1991 corvette

What is the best way to replace a rear main crankshaft seal on a 1991 corvette?

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Anonymous

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  • Posted on Sep 05, 2012
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Remove transmistiom,torkconverter and fly wheel.this will give you access to the seal.

  • Anonymous Sep 05, 2012

    some people are suggesting that removal of the engine is easier than trying to do this job from underneath, what do you think?

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  • Posted on Feb 25, 2013
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Its called a sneeky pete.

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Anonymous

  • 426 Answers
  • Posted on Oct 17, 2008

SOURCE: 360 ci Dodge Rear Main Bearing Seal Replacement

Yes ,regardless of which seal is used as you have to loosen main bearings so the crank can be moved down as the seals are crush type and you wont have the clearance to fit the new one,Split seals (2 piece)are the easiest to fit without moving the crank too much.The one piece seal also means trans removal.As far as removing trans completely you may be able to move it back while its being held up by a trolley jack and only pull it back far enough to give you the clearance needed.Autos are far easier than manuals.If its the rope type seal a special tool is used to fit them and its not a tool that is sold just anywhere as that type of seal kept noahs ark from sinking and havnt been used in engines for many many years.

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Marvin

  • 85242 Answers
  • Posted on Jan 24, 2009

SOURCE: rear main seal

THE REAR MAIN IS WHAT IS CALLED A FULL CIRCLE SEAL, SO YES THE TRANS AND FLYWHEEL MUST BE REMOVED, U WILL ALSO NEED THE SPECIAL FORD SEAL INSTALLER, WITHOUT IT THE SEAL WILL MOST LIKELY LEAK SOONER AFTER INSTALLATION.

Bob B

  • 272 Answers
  • Posted on May 23, 2009

SOURCE: cost to replace rear main seals on 2001 jeep gr. cher. ltd.

Actually yeah you are in luck that combination only requires dropping the oil pan. The seal is actually fairly easy to do it yourself, if your inclined. Parts about $20.00 and it's book rate is 5 hours. around here shops charge around $85/hour. About $500.00 out the door or under $50.00 if you want to get greasy. Here's a good picture guided step by step on a Jeep CJ with a 4.0 liter, yours is pretty much the same:

http://jeepin.com/features/rearmain/index.asp

Anonymous

  • 1486 Answers
  • Posted on Jul 28, 2009

SOURCE: 1994 nissan quest crankshaft rear main seal removal

There is no other way other than to remove the engine.I now its a lot of work but if you want to do the job properly then thats the way to do it.You can remove the gearbox and try.I think thats a waist of time good luck.

Anonymous

  • 93 Answers
  • Posted on Oct 30, 2009

SOURCE: Rear Crankshaft oil seal

ref rear main oil seal pre size tool needed to fit seal this beds the seal into housing should be no need to trim ends fit rear main cap fit seal housing loose fit tool lubricate seal revolve anticlockwise nip seal cap screws a bit at a time keep well lubricated seal will then find its correct position and sit flush

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Oil leaking from toyota camry 1992, 1994 model
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I have 1994 bluebird nissan altima with oil leak in transmission side.What posssible causes of it?
The Rear Main Seal is the main area for an Oil Leak on the Transmission Side. You will need to drop the transmission to remove the old rear main seal and install the new one.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

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I was told I have to replace the crankshaft seal and oil pan gasket on my 2000 chevy malibu and will cost approx. $380.00. Also is the rear main seal the same thing as the crankshaft seal??? Thanks!
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Feb 01, 2011 • Chevrolet Malibu Cars & Trucks
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Rear barring an seal replaced
I'm not sure if this is the right part of your car but, are you talking about the rear seal on the engine for the crankshaft?

If so:

Rear Main Oil Seal REMOVAL & INSTALLATION Fig. 1: Rear main seal installation for the 2.3L and 2.5L engines 85553306.gif
Fig. 2: Removing the rear main seal 85553307.gif
Fig. 3: Installing the rear main seal on the 2.9L engines 85553308.gif
If the crankshaft rear oil seal replacement is the only operation being performed, it can be done in the vehicle as detailed in the following procedure. If the oil seal is being replaced in conjunction with a rear main bearing replacement, the engine must be removed from the vehicle and installed on a work stand.
  1. Remove the starter.
  2. Remove the transmission from the vehicle, following the procedures in Section 7.
  3. On a manual shift transmission, remove the pressure plate and cover assembly and the clutch disc following the procedure in Section 7.
  4. Remove the flywheel attaching bolts and remove the flywheel and engine rear cover plate.
  5. Use an awl to punch two holes in the crankshaft rear oil seal. Punch the holes on opposite sides of the crankshaft and just above the bearing cap to cylinder block split line. Install a sheet metal screw in each hole. Use two large screwdrivers or small pry bars and pry against both screws at the same time to remove the crankshaft rear oil seal. It may be necessary to place small blocks of wood against the cylinder block to provide a fulcrum point for the pry bars. Use caution throughout this procedure to avoid scratching or otherwise damaging the crankshaft oil seal surface. To install:
  6. Clean the oil seal recess in the cylinder block and main bearing cap.
  7. Clean, inspect and polish the rear oil seal rubbing surface on the crankshaft. Coat a new oil seal and the crankshaft with a light film of engine oil. Start the seal in the recess with the seal lip facing forward and install it with a seal driver. Keep the tool, T82L-6701-A (4-cyl. engines) or T72C-6165 (6-cyl. engine) straight with the centerline of the crankshaft and install the seal until the tool contacts the cylinder block surface. Remove the tool and inspect the seal to be sure it was not damaged during installation.
  8. Install the engine rear cover plate. Position the flywheel on the crankshaft flange. Coat the threads of the flywheel attaching bolts with oil-resistant sealer and install the bolts. Tighten the bolts in sequence across from each other to the specifications listed in the torque chart in this section.
  9. On a manual shift transmission, install the clutch disc and the pressure plate assembly following the procedure in Section 7.
  10. Install the transmission, following the procedure in Section 7.
prev.gif next.gif
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Oct 07, 2010 • 1994 Ford Explorer Limited
0helpful
1answer

I have a 2006 Pontiac Grand Prix, it is supercharged 3800. I have about 115,000 miles on it and I change the oil every 3,000 miles, check fluids, regular preventative maintenance, etc. I noticed a small...
If it's oil, it's coming from the rear main seal.. I would go with this idea.

The seal doesn't cost much but the labor to get to it does.

To give you an idea what is involved the procedure is illustrated below from the service manual:

Removal & Installation 3.8L Engine To Remove:
  1. Drain the engine coolant.
  2. Drain the engine oil.
  3. Remove the oil pan.
  4. Remove the engine flywheel.
  5. Remove the rear oil seal housing and gasket. Rear seal removal 3.8L gm-03-38-1175.gif

  6. Remove the rear main seal by placing the housing face down on 2 blocks of wood. Using a drift tool and hammer tap the seal out of the housing.
To Install:
NOTE: Do not lubricate the rear main oil seal or the installation tool. Do not touch the sealing lip of the rear main seal once the protective sleeve is removed.
NOTE: Use a clean lint free cloth to clean the crankshaft sealing surface. Remove sharp edges or burrs that could damage the rear main oil seal. Remove burrs or sharp edges with a crocus cloth.
  1. Carefully remove the rear oil seal from the protective sleeve.
  2. Install the oil seal onto the seal driver EN-47623 or equivalent by placing the seal at an angle and twisting until it is fully seated.
  3. Install the seal into the housing using the seal driver EN-47623 or equivalent and driver handle J-8092 or equivalent. Apply downward force until the seal is seated. NOTE: Ensure that the housing gasket is installed correctly and that the oil passages are not blocked.
  4. Using a new gasket Install the rear oil seal housing on the engine being careful not damage the rear main seal. NOTE: The plastic inserts are used in production and are not needed for assembly.
  5. Hand tighten the bolts. Rear seal housing alignment 3.8L gm-03-38-1176.gif

  6. Place a straight edge on the crankshaft rear oil seal housing flange and the engine block oil pan flange. Using a feeler gauge check that there is no more than .0004 in (0.10 mm) step on each side. Rotate the housing to make the steps equal on both sides.
  7. Tighten the housing bolts 11 ft-lb (15 Nm) plus an additional 50 degrees.
  8. Ensure that the housing did not move out of specification. Repeat step 6 if the oil seal housing is not within the specified range. Replace the rear oil seal housing if the specified measurement can not be reached.
  9. Install the flywheel.
  10. Install the oil pan.
  11. Fill the engine oil and the cooling system.
  12. Check for leaks
5.3L Engine To Remove:
  1. Remove the flywheel from the crankshaft.
  2. Remove and discard the crankshaft rear oil seal from the rear cover.
To Install:
  1. Use clean engine oil to lubricate the outside diameter of the crankshaft rear oil seal and rear cover oil seal bore.
  2. Install the tapered cone and bolts of a J 41479 or equivalent crankshaft rear oil seal installer onto the crankshaft.
  3. Place the crankshaft rear oil seal onto the tapered cone.
  4. Install the threaded rod of the J 41479 crankshaft rear oil seal installer into the tapered cone. Rear main seal installer 5.3L gm-03-53-3872.gif

  5. Install the crankshaft rear oil seal by turning the handle of the J 41479 clockwise.
  6. Remove the J 41479 crankshaft rear oil seal installer from the crankshaft.
  7. Install the flywheel onto the crankshaft.
prev.gif next.gif--- I'm not sure what the exact cost would be as the hours were not listed for this procedure on my online resource.
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Sep 02, 2010 • 2006 Pontiac Grand Prix
2helpful
1answer

My 1994 camaro w/ 3.4L engine has an oil leak in rear of engine. It is running down both sides of the block in rear. Oil filter is wet, but not leaking, the starter and bell housing drip oil and its...
This is most likely a leak from your rear main seal. It happens and can be a pain to replace if you're a DYI kinda person without the nec. equipment.
  1. Raise and safely support the vehicle with jackstands.
  2. Remove the transmission.
  3. If equipped with a manual transmission, remove the clutch and pressure plate.
  4. Remove the flywheel assembly.
  5. Using a suitable prytool, carefully pry the old seal out.
6. Inspect the crankshaft for nicks or burrs, correct as required.
88143g59.gif Crankshaft rear main seal - 5.7L engine

To install:
  1. Clean the area and coat the seal with engine oil. Install the seal onto tool J-34686 for 3.4L engines, J 41349 for 3.8L engines or J 35621 for 5.7L engines.
  2. Install the tool (with the seal mounted to it) onto the rear of the crankshaft. Tighten the screws snugly to be sure the seal will be installed squarely over the crankshaft.
88143g60.gif Exploded view of the rear main seal installation - 3.4L engine
Click to Enlarge
  1. Tighten the wing nut on the installation tool until it bottoms out.
  2. Remove the tool from the crankshaft or rear oil seal housing, as applicable.
88143g61.gif Rear main seal and installation tool - 3.8L engine
Click to Enlarge 88143g62.gif After position the seal on the tool, install it to the crankshaft housing

  1. Install the flywheel.
  2. If equipped with a manual transmission, install the clutch and pressure plate.
  3. Install the transmission.
  4. Check the fluid levels, start the engine and check for leaks.
Read full answer
Dec 30, 2009 • 1995 Chevrolet Camaro
1helpful
1answer

How do i know if i have a 1 pc rear main seal or a two pc seal on my 1991 mustang 302
You have a one pc rear main seal,You will have to remove trans,from the car to install the rearmain seal.Check freeze plugs,and cam plug for leaks also,while you have the trans out.Also make sure the crank shaft is not damaged with a roove cut in it from the old seal.If it does,purchsae a repair sleeve for the crankshft to put on the crankshaft before installing the rear main seal.I hope this was helpful,if so ,let me know,thanks
Read full answer
Oct 01, 2009 • 1991 Ford Mustang
0helpful
2answers

Oil leaking for between the bell housing and the engine block
This is most likely the rear main crankshaft seal, the trans must be removed to replace the seal.
Read full answer
Dec 02, 2008 • 1991 Mitsubishi Eclipse
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