LT4 Front Crank Seal
Thread Starter
Advanced
Joined: Jun 2012
Posts: 91
Likes: 0
From: Texas
LT4 Front Crank Seal
Has anyone ever been able to change the front crank seal on an LT motor in car? I have a 96 CE LT4 and I have the front of the engine all torn apart for an Opti Replacement and I found where my oil leak has been coming from. It is definitely the Front Crank seal. 
Thanks!
Thanks!
Thread Starter
Advanced
Joined: Jun 2012
Posts: 91
Likes: 0
From: Texas
I have a hub/ wheel puller that will get it off but getting it on I'm not sure about. It should be keyed right? I'm about to go out in the garage and mess with it now. I have been having a hell of a time with this job with my supercharger still installed on the bracket.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Tools I use to remove the hub
Cut down extension I use in the crank hole IOT keep the puller from bottoming out
I use an adjustable wrench to keep crank from turning when removing crank bolt
My puller extends in front of crossmember and gives room to spin the puller
Cut down extension I use in the crank hole IOT keep the puller from bottoming out
I use an adjustable wrench to keep crank from turning when removing crank bolt
My puller extends in front of crossmember and gives room to spin the puller
Last edited by aboatguy; May 9, 2013 at 09:43 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Advanced
Joined: Jun 2012
Posts: 91
Likes: 0
From: Texas
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Has anyone ever been able to change the front crank seal on an LT motor in car? I have a 96 CE LT4 and I have the front of the engine all torn apart for an Opti Replacement and I found where my oil leak has been coming from. It is definitely the Front Crank seal. Thanks!
Thanks!I have a hub/ wheel puller that will get it off but getting it on I'm not sure about. It should be keyed right? I'm about to go out in the garage and mess with it now. I have been having a hell of a time with this job with my supercharger still installed on the bracket.
MIke
Last edited by aboatguy; May 9, 2013 at 11:12 PM.
Thread Starter
Advanced
Joined: Jun 2012
Posts: 91
Likes: 0
From: Texas
No I uninstalled the damper 1st. I pulled the car out and did a good scrubbing/degreasing for a few hours. Letting it dry tonight and I'll look at it better tomorrow in the daylight to see whats going on.
Melting Slicks
Joined: Nov 2005
Posts: 3,323
Likes: 142
From: Green Valley Arizona
The ONLY way to remove the dampner off of an LT4 is to raise the engine about an inch.
Easy to do....just did this about two months ago.
Oil pan must be in place.
Loosen the the 18mm nut on the bottom of each motor mount,
Place a block of wood under the oil pan,
Use floor jack to lift engine about an inch,
Reach in and lift the dampner out,
Lower engine back into place.
To put the dampner back on, again raise the engine.
Just leave the nuts on the motor mount studs; unscrewed to the bottom of the threads.
Easy to do....just did this about two months ago.
Oil pan must be in place.
Loosen the the 18mm nut on the bottom of each motor mount,
Place a block of wood under the oil pan,
Use floor jack to lift engine about an inch,
Reach in and lift the dampner out,
Lower engine back into place.
To put the dampner back on, again raise the engine.
Just leave the nuts on the motor mount studs; unscrewed to the bottom of the threads.