Thread: P0421 Code
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Old 08-30-2010, 04:11 PM   #18
Chazberry
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Join Date: Feb 2005
Posts: 7,103

1995 SW2
2003 VUE 3.0L
Default Re: P0421 Code

Quote:
Originally Posted by snicknc View Post
That's good info to know about the intake gasket. Given that it's such a minor leak, I think it's likely not the head gaskets. I've never seen them go in a small way, but I guess it's always possible.
Yeah - this bizarro engine has a lower manifold that sits between the heads -
http://www.saturnfans.com/forums/att...7&d=1254936197
- and the Intake sits on top of that (no coolant passages in there).

I'm thinking the head gasket is the only way coolant could get into the exhaust.

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