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Questions tagged [exhaust-manifold]

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1 answer
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2000 Camaro headers/Borla

Just bought 2000 Camaro stock and looking to add headers and Borla exhaust. Thinking BBK long tube headers and a Borla exhaust. Has anyone done that? Any recommendations? Any other suggestions ...
Mike29's user avatar
  • 31
2 votes
0 answers
542 views

Are my cats bad? -- secondary O2 sensor voltage

I have a 2002 BMW M3, and I've been trying to track down a poor fuel economy issue for quite some time now. My long term fuel trims are high (+7%-10%), and when I had the car on the dyno a couple ...
user9999's user avatar
1 vote
1 answer
680 views

Putty for exhaust manifold leak

Having some issues with a small exhaust leak from the exhaust manifold on my campervan. We got it taken to a mechanic to repair the manifold leak but he's ended up just making it worse. I dont have ...
Bren's user avatar
  • 21
1 vote
0 answers
208 views

Audi A6 C6 3.0 TDI Revs Fluctuation and White Smoke

I have a really unusual problem. Once in a while (it doesn't do this always, it's really but really RANDOM), the car when warming up, it starts revs fluctuation and white smoke coming from exhausts. ...
chr0sy's user avatar
  • 11
1 vote
0 answers
2k views

Dodge Ram 1500, 2003 oil leaking from exhaust manifold

I recently had a mechanic replace the exhaust manifolds on my Dodge Ram 1500, 2003. Since I got it back I noticed oil leaking from bolt numbers 5 and 6 on the manifold diagram. I can see the oil ...
Mike Marseglia's user avatar
1 vote
0 answers
258 views

Black soot on exhaust manifold 2015 Ford KA 1.2

Is this normal or does it need replacing?
Geeegs's user avatar
  • 11
1 vote
1 answer
95 views

2014 Passat sounds louder than before

I have a 2014 VW Passat 2.5L I bought it used last year. It was super quiet and great to drive when i bought it. It has close to 80000 km on it. The past few months I had i sitting in the garage not ...
oumuamua's user avatar
0 votes
0 answers
279 views

What are these catalytic converter bolts called?

Replacing 2 catalytic converters on my car and one of these bolts broke off. I thought they're called manifold double end studs kit, but apparently they are smaller. Old bolt thread size is M10 but ...
smalldoer34's user avatar
0 votes
0 answers
121 views

Why do Tri-Y Headers give more low end torque and struggle at top and why 4-1 Headers give better top end torque?

Everywhere i read says Tri-Y is better for bottom end and that the 4-1 is better for top end. Why exactly is that? I thought Tri-Y would have more top end "breathing" and make more torque at ...
Timothy Scherer's user avatar
0 votes
0 answers
736 views

How do I apply silicone to an exhaust manifold?

I’m going to be removing the exhaust manifold as I’m going to be removing the cylinder head. When putting the exhaust manifold back on how exactly do I put the silicone. Currently there is a metal ...
Junaid's user avatar
  • 101
-1 votes
1 answer
321 views

what's the name of the sound cars and motorcycles makes during redlining?

when revving a car or a motocycle engine to a high rpm its starts to make a sound like (dun dun dun dun dun dunn) watch this video to understand what i mean( https://www.youtube.com/watch?v=...
mathew Krüger's user avatar