Timing Chain Cover leaking? - Team Camaro Tech
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post #1 of 4 (permalink) Old Aug 8th, 03, 03:53 PM Thread Starter
Senior Tech
 
Join Date: Apr 2003
Location: Allen, TX
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I am trying to diagnose a small oil leak that keeps making a mess of things. I have replaced completely the oil pan seal with a one piece blue felpro, using the correct 'thick' version to fit my 383 smallblock and summit 7 qt pan.

Problem is I still have a leak. It seems to be coming from between the harmonic balancer and the timing chain cover. What seals this area? Is there some sort of O ring seal on the timing chain cover where the crank or harmonic balancer passes thru? Its definitely not the top bolt near the fuel pump, and its not the front lip of the oil pan gasket that seals to the timing chain cover. So I am thinking whatever the harmonic balancer passes thru.

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #2 of 4 (permalink) Old Aug 8th, 03, 05:51 PM
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Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
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Brian,
Yes there is a round seal that the damper hub fits through. The dampers can get a groove worn in them over a lot of miles and that will cause them to leak. There is a thin stainless sleeve available to fix that problem if it's what you have. Either way, you have to pull the damper to replace the seal so you can inspect the damper hub while you are there.
Hope this helps,

Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner


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post #3 of 4 (permalink) Old Aug 10th, 03, 06:21 AM
 
Join Date: Feb 2003
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Did you plug the hole on the passanger side that is used to hold the fuel pump push rod during istallation? If not stick a 3/8"-16 X 1/2" bolt in there.

1972 Chevy Nova 357cubes
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post #4 of 4 (permalink) Old Aug 10th, 03, 09:25 AM
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Eric
 
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. . . and when you replace the front seal make sure you put a little Permatex Ultra Black on the outside of the front seal so it seals to the timing chain cover. I had one that would leak between the cover and the seal instead of between the seal and the vib dampener.

Good luck.

E85 racer and E85 carb builder

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68 Camaro, E85 powered 427" small block. 9.96 @ 133 MPH, 1.319 sixty foot on motor. 5.92 eighth @ 116 with a 1.42 sixty breaking beams with back tire on the bottle
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