Fixing that pesky header stud oil leak.
11-27-2014, 11:14 AM
#1
Race Director
Thread Starter
Fixing that pesky header stud oil leak.
Ive got the car apart for some detail cleaning and figured Id fix the header stud oil leak while Ive got it apart,any tips and which stud is the one that leaks,is it both sides of the block or only one side?Thanks.
12-02-2014, 06:56 PM
#2
Le Mans Master
Member Since: Oct 2004
Location: South-central Missouri
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It is the center stud, separate from the flange bolts. It is between the 3-5 and the 2-4 exhaust tubes, if memory serves, and NOT the flanges themselves.
I used some RED RTV on the threads. Hasn't leaked a drop in 5 years now...
I used some RED RTV on the threads. Hasn't leaked a drop in 5 years now...
12-04-2014, 05:16 AM
#3
Race Director
Thread Starter
Thanks Paul. Is the leak-leaks limited to these areas alone or is it throughout all of the header studs?
12-04-2014, 04:17 PM
#4
Tech Contributor
That would be zero pressure oil flowing from top of heads down to oil pan.
Fixing Oil Leaks on the LT5 Engine by Marc Haibeck
Last edited by Dynomite; 12-05-2014 at 10:32 AM.
10-10-2023, 04:23 PM
#5
Pro
That stud that Paul refers to appears the ONLY stud (one each side) that is threaded into the Oil Return Passage Way.
That would be zero pressure oil flowing from top of heads down to oil pan.
Fixing Oil Leaks on the LT5 Engine by Marc Haibeck
That would be zero pressure oil flowing from top of heads down to oil pan.
Fixing Oil Leaks on the LT5 Engine by Marc Haibeck
chris
10-10-2023, 06:09 PM
#6
M8-1.25 for thread and what you buy and use is very dependent upon the flange thickness. Very early studs in the OE were nearly 40mm long with about a 5mm shoulder in the center,
***** Well it appears that the stud in question might actually be 3/8-16 (see post #11) BUT the balance of the hardware converter to cylinder head is M8-1.25 x whatever length required.
***** Well it appears that the stud in question might actually be 3/8-16 (see post #11) BUT the balance of the hardware converter to cylinder head is M8-1.25 x whatever length required.
Last edited by WVZR-1; 10-13-2023 at 09:34 AM.
10-10-2023, 07:19 PM
#8
10-13-2023, 08:32 AM
#11
Drifting
10-13-2023, 09:14 AM
#13