exhaust manifold

[raytech]

Is the exhaust manifold prone to cracking in any certain spot. I bought an 85 318 and when I started it, it sounded like it had a bad rod. Then I started another car I bought, which had a bad rod. Very different sound. I am thinking either cracked manifold or stuck rings. I can't find my compression tester as of right now, so I thought I would ask about the manifold until I find it. It also seems to be running rich right now, and the inspection light is on.

No, I am not driving it.

[Starmavin]

The noise could be a rod knock or a wrist pin. The noise they make are both very different sounds but both are far from the sound of an exhaust leak. Not actually hearing the noise makes it nearly impossible for anyone to trouble shoot over the net....

[raytech]

thanks for the reply

It is definately not a rod. i have heard enough of them to know that. Wrist pin would be my thought. It is very metalic sounding. not like a rod clank though. almost sounds like there is no exhaust manifold.

here is a quick vid from my kodak, which isn't a real accurate sound but...



http://theotherwebsite.net/vids/noise.WMV

[Starmavin]

That is an exhaust leak for sure. Check your flange gasket (where your pipe meets the manifold).

[raytech]

found this lovely tonight



WTF? How don't you notice that?

[and0pand0]

Lmao!

[Starmavin]

Cool! I'll bet when you hit the gas, it feels like you have square tires!

[raytech]

Originally Posted by Starmavin

Cool! I'll bet when you hit the gas, it feels like you have square tires!

I'm sure it does, but I haven't had the pleasure of driving this car yet. They obviously drove it for quite some time after the damage occurred. the bolt heads are half gone as well.