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Jun 30, 2007 | 01:31 PM

Chenzo26

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Pole Position

Joined: Nov 2006

Posts: 334

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From: Florida

Quick Question

Whats up guys. Here my questions. Do you need to get your heads machined before you reinstall them if you removed them to replace bent valves?

Jun 30, 2007 | 03:21 PM

GSteg

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From: CA

I'm not a professional by any mean, but if you're going to replace the headgasket, you might as well get the heads machined so the new gasket can seat in properly.

Jun 30, 2007 | 06:01 PM

VVT-i

Lexus Champion

Joined: May 2002

Posts: 2,781

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From: Georgia

Bent valve? What's happened? You and your mechanic will have to inspect the cylinder head for all the damage to the valve seats, head surfaces and so on. The machine shop will have to follow the factory spec. and remove only necessary metal to make the cylinder head true/straight and still be able to use factory head gasket.
What's happened? Only thing I can figure is the engine sucked in some water, broke timing belt or badly wrong cam timing....

Jul 1, 2007 | 12:41 AM

Chenzo26

Thread Starter

Pole Position

Joined: Nov 2006

Posts: 334

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From: Florida

Quote:

Originally Posted by VVT-i

My mechanic got confused with the timing marks when replacing the timing belt and didn't time it correctly. This is why the valves are bent. There are only 3 bent valves on one head, and he said it won't require a machine job. However, I live next door to a mechanic, and he said its a must to get the head machined after its pulled.

Jul 8, 2007 | 05:31 PM

michael200

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Joined: Oct 2005

Posts: 123

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From: AZ

Don't waste your money.

I wouldn't bother to machine the head from the problem you have described. You could easily create more problems, and the head surface should not have been effected just from tagging a couple valves. Save your money.