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Head Rebuild - One from Two (Advice Please)

 
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XLR8  



Joined: 30 Mar 2016
Posts: 143
Location: Byron Bay, Australia

PostPosted: Sun Jan 26, 2020 7:21 am    Post subject: Head Rebuild - One from Two (Advice Please) Reply with quote

I have a head recently removed from the car with a burnt exhaust valve. Otherwise looks to be in very good shape.

I have another valvetrain/cam/etc (completely disassembled) that I won't be using due to some cracking of that head casting.

Is it feasible to replace the burnt exhaust valve with one from the other head?

Just pop a new valve in place and grind the seat, or is there more required for a reasonable job. Thinking of valve seals and buckets here ....

Note: I would likely get the head skimmed prior to replacing the valve.
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Paul  



Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin

PostPosted: Sun Jan 26, 2020 10:02 am    Post subject: Reply with quote

Used valve should be fine, no need to replace the bucket since it is already worn into the cam. I always replace valve seals when the springs are off.
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XLR8  



Joined: 30 Mar 2016
Posts: 143
Location: Byron Bay, Australia

PostPosted: Mon Jan 27, 2020 7:18 am    Post subject: Reply with quote

Thanks Paul, that makes sense. I'll grab a full gasket kit with the valve seals in it so I am ready to go once putting the engine together.
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 1227
Location: Maysville, Colorado

PostPosted: Mon Jan 27, 2020 7:36 am    Post subject: Reply with quote

Check all the old exhaust valves for wear on stem,a sort of brownish area,many times a wear edge felt with fingernail. Obviously use the best one. Also check the valve guides for wear by wobbling valve. Guides are cheap and easy to replace by any head repair shop.
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XLR8  



Joined: 30 Mar 2016
Posts: 143
Location: Byron Bay, Australia

PostPosted: Mon Jan 27, 2020 7:42 am    Post subject: Reply with quote

Thanks MikeJinCo. Good advice. I am planning to get the machine shop to clean and skim the head, and do the rest myself.

I recently had them do a full head rebuild, and it wasn't cheap and I worked out most of it I could have done myself.
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