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08-20-2012, 03:20 PM
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#1 |
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What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Changing main seals while engine still in blazer
Help my sons 78 k5 appears to need the main seals replaced, has anyone done it while it was still in the truck? Its a k5 with a 8" lift 400 cid engine.
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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08-21-2012, 09:05 AM
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#2 |
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Registered User
 
Join Date: Oct 2006
Location: Southern Kalifornia
Posts: 3,066
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Re: Changing main seals while engine still in blazer
Since it has a lift the it shouldt be too hard. Drop pan,unbolt rear main cap. With an awl or small flat screwdriver,push the old main seal out,being careful not to touch the crank. Then push the new one in place(block side) and replace the main cap side. The re-install main cap(use some assembly lube on bearing) and torque to spec. Get a Felpro 1pc oil pan gasket,will make life WAY EASIER!
ALSO put a light coat of oil on the seal lip so it doesnt run dry.
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------------------------------------------------------ -Lance 2000 Chevy C2500, 5.7, 4L80e 1999 Suburban K2500, 7.4, 4L80e 1980 Camaro..son's car...PROJECT |
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08-21-2012, 08:22 PM
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#3 | |
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Registered User
Join Date: Jul 2010
Location: Hudsonville, MI
Posts: 174
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Re: Changing main seals while engine still in blazer
Quote:
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_______________________________________________ 1985 Chevy Scottsdale K20 350 with 700R4 running 3.42 gearing aka "The Honey Badger" 1993 Silverado C3500 Ext. Cab Dually 6.5 turbo diesel |
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08-21-2012, 08:26 PM
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#4 |
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Registered User
Join Date: Dec 2011
Location: Creighton Sask. Canada
Posts: 4,121
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Re: Changing main seals while engine still in blazer
Just pull the inspection plate from trans then do as stated earilier, no big deal, don't do it hot let the oil drip down into the pan for awhile not right after running it that way it isn't drip drip dripping off the crank on your face. Just did one and a HV oil pump too.
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08-21-2012, 09:15 AM
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#5 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Changing main seals while engine still in blazer
Follow these instructions: http://www.73-87.com/7387garage/drivetrain/rearseal.htm
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08-25-2012, 12:59 AM
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#6 |
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What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: Changing main seals while engine still in blazer
Thanks everyone, he is ging to try it next week. Thanks again!!
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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