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oil leak from around harmonic balancer
Thread Starter
Cruising
Joined: Mar 2006
Posts: 14
Likes: 0
oil leak from around harmonic balancer
i have had my 2003 z06 for 2 years and 18k miles now. currently at 90k miles and is my d/d. two weeks ago at a hpde after the third 20 minute session i noticed the oil leak 
. i think i lost about 3/4 of a quart according to the dip stick. h/b now with slight wobble. since then i have had to drive to work (5 miles) never exceeding 2000 rpms and the leak has stopped. do you think it is just the seal arround the h/b or is the front crank bearing or seal bad. my plans are h/c, u/d pulley, arh headers with cats, tex clutch. if the front of the crank is bad i will possibly go forged. any help will be appreciated. thanks in advance!
. i think i lost about 3/4 of a quart according to the dip stick. h/b now with slight wobble. since then i have had to drive to work (5 miles) never exceeding 2000 rpms and the leak has stopped. do you think it is just the seal arround the h/b or is the front crank bearing or seal bad. my plans are h/c, u/d pulley, arh headers with cats, tex clutch. if the front of the crank is bad i will possibly go forged. any help will be appreciated. thanks in advance!
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
If you're planning a cam install, then you will have easy access to the front seal then. The seal is pressed into the timing chain cover, and seals on the shoulder of the balancer.
It is a normal PM item to replace when doing a cam swap.
It is a normal PM item to replace when doing a cam swap.
Instructor
Joined: May 2007
Posts: 240
Likes: 0
i have had my 2003 z06 for 2 years and 18k miles now. currently at 90k miles and is my d/d. two weeks ago at a hpde after the third 20 minute session i noticed the oil leak . i think i lost about 3/4 of a quart according to the dip stick. h/b now with slight wobble. since then i have had to drive to work (5 miles) never exceeding 2000 rpms and the leak has stopped. do you think it is just the seal arround the h/b or is the front crank bearing or seal bad. my plans are h/c, u/d pulley, arh headers with cats, tex clutch. if the front of the crank is bad i will possibly go forged. any help will be appreciated. thanks in advance!
. i think i lost about 3/4 of a quart according to the dip stick. h/b now with slight wobble. since then i have had to drive to work (5 miles) never exceeding 2000 rpms and the leak has stopped. do you think it is just the seal arround the h/b or is the front crank bearing or seal bad. my plans are h/c, u/d pulley, arh headers with cats, tex clutch. if the front of the crank is bad i will possibly go forged. any help will be appreciated. thanks in advance!
Melting Slicks
Joined: Sep 2005
Posts: 2,625
Likes: 1
From: Rhode Island
If you replace the balancer and have the car torn down that far, by all means replace the seal and timing cover gasket.
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Intermediate
Joined: Feb 2004
Posts: 40
Likes: 0
From: Dallas TX
Had the H/B replaced on mine. Make sure to use a new bolt to hold it on, and you have to torque it to 200 Ft/Lbs. Any less and you run the risk of it coming loose in the future (which happened to me because of unsaavy dealership mechs)
Melting Slicks
Joined: Sep 2005
Posts: 2,625
Likes: 1
From: Rhode Island
Le Mans Master
Joined: Jun 2002
Posts: 8,352
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From: In the pit, trying to love someone.
