|
Just bought an H-reg (E30) BMW 318IS (16valve engine). The only problem is a pronounced and vaguely irritating rasping sound from up front only between 3000 revs and 3700 revs - I thought was the exhaust so put it on the ramp and the exhaust is very solid. Any ideas. Also anything in general that I should watch out for with this car? Thanks!
|
Matt
The exhaust may look solid from the outside, but this could be loose internal components in a silencer, which won't be visible. I can't remember the exhaust layout on these. There could be a small crack somewhere on the manifold or on the top of the exhaust, not visible from below. Have you checked for leaks by holding a rag hard over the tailpipe whilst it idles?
Regards
John S
|
|
Thanks John, I'll try the rag trick-It sounds to me as though you might be right about a loose manifold though as I've heard this could be a problem before.
|
Matt
Yes, you are right. Apparently exhaust manifold studs can fail, so that's another point to check. These tend to make the car noisy on start-up, though, rather than at specific engine speeds.
Regards
John S
|
|
|
![2019 Lexus NX 300h 2.5 5dr CVT [8" Nav]](http://images.honestjohn.co.uk/imagecache/url/crop/90x60/https/assets.heycar.co.uk/t_default-export/f_auto/application_assets/vehicles/pictures/d071519fafe490a297fc3c43bb2b2869/973a27ba953b6c97acc24d83357826ae.jpg)
