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View Full Version : Tick; exhaust leak or valve?


Supra5MGTE
12-04-2006, 08:51 AM
This '85 of mine devloped a tick. It's only when the motor is cold. when it warms up it goes away. it's coming from the exhaust side of cyl #1. On my corvette I had long tube headers and every so often I had to tighten them up b/c of the ticking noises... exhaust leaks. but it's been a few years, so i'm not 100% sure if it's an exhaust leak or coming from the exhaust valve train. any tips on checking?
makanak
12-04-2006, 11:05 AM
sounds like a leak in the exhaust manifold gasket. Pour some sea foam in it, if it's leaking, you WILL see it!
Supra5MGTE
12-04-2006, 11:18 AM
thats exactly what I was thinking to do for a test. I used a flashlight looking around the manifold for blk soot streaks. couldn't find any on the top. but I can't see the bottom.
Donn29
12-06-2006, 11:15 PM
I'd just assume valvetrain noise. Recent rebuild?
Supra5MGTE
12-06-2006, 11:22 PM
nope. 180K. the P.O. "said" the head was "redone" but I find no evidence to back that up. most people say "fully rebuilt" when they get the intake manifold-up job. lol. And I have seen smoke under the hood when I used seafoam. I need to seafoam it again and pay attention to where it's coming from this time. If it is engine noise, I'll be going to a thicker cold Visc oil. 15W vs the current 10W. I have a nice metal Ex manifold gasket sitting in the garage anyway, so I'll do it and see what happens.
Donn29
12-06-2006, 11:27 PM
Thicker oil will be worse for ticking in the cold dry starts, FYI.
TOYMAN321
12-07-2006, 03:37 AM
Having the sound only when cold doesn't sound like valve train to me, my guess would be leaking exhaust gasket. I've used a length of hose as a stethoscope to pointpoint noises before, maybe give that a shot?
Mk2 gold
12-07-2006, 04:33 AM
My 83 must have 15 oil at least or thikker otherwise it is tikking,, I think it ventil lifts thats noising..
Supra5MGTE
12-07-2006, 07:58 AM
well i'm going to do the ex manifold gasket. see if that fixes it. hopefully it does. I have a feeling it's that myself. If that doesn't fix it then I'll try 15-40 oil. If nothing fixes it... ill go back to my 10-40 and live with it.
Donn29
12-09-2006, 12:14 PM
Thicker oil will be worse for ticking in the cold dry starts, FYI.

Oops, meant to say cold, as in lack of oil. But since your in FL, perhaps thats not it.
Waiting to here, myself.