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Tinkling exhaust manifold
Posted: Mon Mar 27, 17 9:29 pm
by octanejunkie
My exhaust is making a noise like somebody has chucked a 10p piece into the exhaust manifold.
When i had a check over last october the mechanic said it was caused by some kind of emissions related valve or something. He said he'd sorted it, and at the time it went away. However, after the run today, the tinkling is back. What is in the manifolds of a 73 Charger 318 that would cause that??
Posted: Mon Mar 27, 17 9:35 pm
by Pete
If it does it under load it would suggest the timing is too advanced, it sounds like you are describing "Pinking" (pre-ignition) Bad for pistons and bottom end!
Posted: Mon Mar 27, 17 9:45 pm
by octanejunkie
Not pinking, definitely a rattle of some sort
Posted: Mon Mar 27, 17 9:51 pm
by charger01
Leaking exhaust gasket will give you a metalic tapping noise. Very common if you have crappy hedman headers which are a tw@t to seal
Posted: Mon Mar 27, 17 10:10 pm
by shaungriff
Heat riser flap in one of the manifolds
Posted: Mon Mar 27, 17 10:41 pm
by Captain Chaos
shaungriff wrote:Heat riser flap in one of the manifolds
That was my thought too. Removed one from my Monte Carlo when we made the exhaust,a vacuum operated flap that is on the bottom of one of the manifolds.
Posted: Tue Mar 28, 17 6:12 am
by ScottyDave
On the passenger side of my 318
Posted: Tue Mar 28, 17 10:24 am
by MattH
Flap in the exhaust manifold for warm up. I have headers now so no flap.
Posted: Tue Mar 28, 17 2:43 pm
by octanejunkie
Yep. Heat riser thing on the passenger side manifold. Most annoying thing ever.. It shall be destroyed!
Posted: Tue Mar 28, 17 4:29 pm
by Dave999
wire it in the shut position
Dave
Posted: Tue Mar 28, 17 10:10 pm
by XP29
One of my manifolds has a flappy type thing that was making the sound you describe. It was loose and bouncing around so I fixed it in place.
Posted: Thu Mar 30, 17 4:16 pm
by octanejunkie
Had a look underneath, and wedged it open, but i still get a bit of a rattle on the over run. Anyone taken theirs out? Can it be done without removing the manifold?
Posted: Thu Mar 30, 17 6:01 pm
by Captain Chaos
The one on my Monte was separate to the manifold,bolted on between the downpipe and manifold, I took the flap out but needed to reuse the body as it is was part of the exhaust,it would have been possible to make a piece but it was just easier.
I had an AMC that had the same set up too so I guess yours is similar.
Posted: Thu Mar 30, 17 6:23 pm
by latil
Took my manifold off and removed flap and shaft then plugged the holes with the mig.
Posted: Thu Mar 30, 17 9:42 pm
by GJUK
Possibly not sealed property - can sounds like something very metallic