Valves rattle

[johndaysGT]

I recently installed a catless downpipe from zzp. After installing it my valves started rattling. I've tried different brands of gas but it doesn't help. Can someone tell me what's up?

[SyntheticShield]

You sure its the valves? That seem like an odd result to the installation of a down pipe.

[archemedes]

I would agree it's a big coincidence that a rattle occurs just after exhaust work (and if it's valves making the noise you have a failure as they have no moving parts, they are the part that moves inside the head)

[agrazela]

It is possible that by replacing your original, double walled DP with a single wall, you just hear your "normal" valvetrain noise more.

[Toasty]

either that, or the gasket didnt seal well at the rear manifold.....


i had ticking from there wen my d/p was loose.

oh and the egr tube at the manifold, too.

[johndaysGT]

I didn't replace the rear manifold gasket. I will though. Hopefully that will take care of it.

[Toasty]

I didn't replace the rear manifold gasket. I will though. Hopefully that will take care of it.

yeah you should replace the gasket between the manifold and the downpipe... some exhaust sealant wouldnt be a bad idea either there.

[johndaysGT]

I finally got around to that gasket swap. It took care of the noise. Thanks for the help!