2001 Chevrolet S-10 Engine

SHANE7224

MEMBER
2001 CHEVROLET S-10
150,000 MILES

I have a 2001 s10 2.2L and I've replaced the engine. When I start it up it sounds like a tractor. Don't think it is an exhaust leak I've checked that. Sounds like back pressure of some kind. Can you help?

Sunday, August 18th, 2013 AT 7:58 AM

10 Replies

HMAC300

MECHANIC
48,601 POSTS

Check to see if you hooked up your secondary air system. Pump is on lower right front of engine compartment

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Sunday, August 18th, 2013 AT 8:42 AM

SHANE7224

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6 POSTS

Could the wrong exhaust manifold gasket cause this because that's where the air pump connects? I had to put the original exhaust manifold on the new engine and the gaskets are different.

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Sunday, August 18th, 2013 AT 8:57 AM

HMAC300

MECHANIC
48,601 POSTS

It cold because you may have installed them backwards causing the problem. Or the old manifold isn't designed for the newer engine. Ws the newere engine the same as the one removed?

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Sunday, August 18th, 2013 AT 9:00 AM

SHANE7224

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Yes, except I had to change the exhaust manifold because the new engine didn't have the air pump hook ups on the manifold. I was looking at the gasket that came off the old engine, and it has reliefs in the gasket for the air pump hook ups, the one I left on was flat.

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Sunday, August 18th, 2013 AT 9:05 AM

HMAC300