2004 1500 truck. Loud ticking noise. Had exhaust checked, no leaks. Shop thought it was in cluch area so dropped tranny to check flywheel, cluch, throw out, pressure plate, nothing. Runs and idles fine. Ran quite on day the very next day loud ticking. Any suggestions?
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limited info generic answer check oil level and for correct filter ---if manifold or upper part of exhaust changed check for proper install and or leak
Easy: buy or borrow a thermal camera. Start the car, point the camera at the suspect area. the exhaust leak will be obvious. More difficult: check for obvious holes or cracks or loud noise in exhaust system. Easiest of all: take car to a muffler shop, they will shoot you an estimate, maybe for free.
Take it to a muffler shop-that mechanic must have a tin ear. I thought my Sentra had a small exhaust leak (slightly loud exhaust noise) from a previously fixed exhaust connection. But a muffler shop guy showed me I had a rusted out catalytic converter. I would suspect your flex pipe may still be leaking.
Exhaust manifold leak? That's not common. You talking about the VVT near the manifold at the top of engine above the power steering pump? Yes indeed, AC Delco is the only one our engines love. 41-103. Obviously you have P0304, what other codes?
I would suggest getting the areas between the cylinder head and the exhaust manifold checked for leaks. Your description sounds like a classic beginnings of an exhaust manifold gasket leak.
It's pretty tough for one of us to diagnose from afar without actually hearing it, but here are your possibilities:
Lifter noise - low oil, worn - noise comes from upper engine
Bearings (main & rod) - again low oil, worn - normally loud from lower engine
Exhaust leak - exhaust manifold and/or gasket - tick from side of engine, gets worse with engine RPMs
I'd have a competent shop look at it for you to get exact fault.
The sound you are hearing is an exhaust leak. Sounds like a ticking noise, goes away when driving, but can be heard when sitting. You probably have a bad manifold gasket, or loose clamp or broken weld on exhaust. Best way to tell is start it up and listen as to find leak. Or take to a muffler shop and have them repair it.
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