Engine squeak noticed when turning off ign.

[61SuperMonza]

What could cause this issue. The engine is a 64 spyder that has been totally rebuilt. It has under 200 miles on it and runs great. I just don't like the sound of a squeak when it is shut down. I have checked the fan and idler and they are fine. I checked the spark plugs and they are torqued to spec. I checked compression and it's great,as well as push rods for proper install. The valve train is all good. I was thinking a head gasket problem or push rod installed backwards. These all check out so what could this squeak be. I'm open to all suggestions. Thanks guys.
Norm

[terribleted]

Squeak. What exactly do you mean by a squeak. A single squeak? Squeaking sounds as the engine stops turning after turning off key? Your ideas above you would expect to make noise that could be heard idling as well.

[61SuperMonza]

It's a faint squeak that you hear when engine is idling. You can barely hear it. It is most audible when shutting down engine. I made a video but I don't know how to post it. I realize that hearing the issue will make it much easier to diagnose.

[terribleted]

Head gasket leaks make a chirping sound almost like a little bird. Worn or dry rocker arms can cause a squeak squeak squeak sound that follows engine rpm. If it was me I would likely run the engine with valve adjusting covers (1/3 valve cover on each side) in place so I could listen closely to the valve train and perhaps isolate it to a particular rocker or eliminate it as a rocker issue. I have had a new rocker arm do this once. I just changed the rocker out for a good used one and it never gave any more trouble. (could also be caused by lack of oiling due to upside down pushrod).

[61SuperMonza]

I have ran the engine and got underneath to listen and can't hear the squeak. I have also removed the valve covers and checked the pushrods for proper install and the rocker arms for signs of heat. All looked good. I also looked in through the damper doors and it was clean as a whistle. No signs of a blow head gasket. I will put my valve adjusting cover on and run it as you suggest and see if I can post the video. Thanks

[bbodie52]

Have you considered purchasing an inexpensive mechanic's stethoscope to use in trying to localize the source of the sound?

https://www.amazon.com/s?k=mechanic%27s ... evancerank

Also, if you wish to post a video of your engine making the sound, the "how to" video below may help...

[61SuperMonza]

I got the problem figured out. First I took my strait pipe off and put the muffler back on so I could hear what was going on. That made things much easier. Plain as day the squeak was coming from the drivers side. Turned out it was the #6 exhaust rocker. I replaced it with an old one and all is good. Seems odd that a new mated rocker and ball would do that. Just glad I had some good rockers to replace it with. Thanks Ted and Brad for the help. I think I'm going to stick with the magnafow muffler. Not quite so loud and sounds great. Much more refined tone.

[terribleted]

Some of these off shore parts are not that great. Very possible to have a couple parts that do not want to wear in to each other nicely even with good parts, but, I have seen this one more than I should with replacement rockers. Squeak may have been at the ball or at the pushrod I suppose.

[61SuperMonza]

I just finished the hot valve adjustment. Figured I may as well get it a dialed in. She is purring like a kitten. Very pleased with the results. We will see tomorrow if I will have to do it again. Thanks again guys for the thoughts.