924Board.org

MikesCoupeGT · Joined: 18 Oct 2006 Posts: 474 Location: Ontario Canada

So as the topic suggests I have a thumping/banging when I am driving around between 2800 and 3200 rpm. Now I know that I could just drive a bit faster than 3200rpm and have it go away but this is about where the average speed is when in town driving. My question is in the tunnel where the exhaust runs should I try to loosen the exhaust and move it towards the back of the car or towards the front?

Just curious.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line

Ian89C4 · Joined: 01 Apr 2011 Posts: 561 Location: North Carolina

Is the thumping due to it rattling because of the harmonics of driving at that RPM for extended time?
If it is I would check the rubber doughnuts that hold the exhaust system to the hangers, they may be too loose and are letting the exhaust rattle.

I don't know how you would move the exhaust back and forth as there are set tolerances for the exhaust distance from certain brackets.

Hope you figure it out.

Ian
_________________
Ian Edgerly
North Carolina

Current:
1981 924 SCCA/ChampCar Weissach Race Car ("Serenity")
1987 924S ChampCar Endurance Car ("Der Weg")
1980 924 Euro ("Wahala")

MikesCoupeGT · Joined: 18 Oct 2006 Posts: 474 Location: Ontario Canada

To be honest I did not see any hangers in the tunnel under the car!! I see where there should be something but I guess I know what I need now.

Thanks Ian.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Yeah, hangers are not optional. Ask skriblz!
_________________
Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Or my arm

_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

scriblz7 · Joined: 07 Dec 2008 Posts: 112 Location: kirkland WA.

rasta speaks the truth
_________________
Riley
79 924 n/a with gt body
15 VW GTI

MikesCoupeGT · Joined: 18 Oct 2006 Posts: 474 Location: Ontario Canada

Thanks guys.
So I of course do not want to use used rubber hangers, but is there a special hanger that is used in the exhaust tunnel kind of behind the gear shift? When I was under the car on the weekend it looked like there should be one there but could not find or see it.

Thanks again. Once I get the rattling fixed I am sure that most of the exhaust smell will be gone as it wont loosen things on me. LOL.

Cheers.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line