Quote:
Originally Posted by LMSRACER
Ed,
That is absolutely true. The heat required to properly heat treat the head is also high enough that the valve seats and valve guides would more than likely fall out of the head. That's why the welding should be done first.
In the last group of photos that you posted of the cylinder heads, I noticed that in the third photo there appears to be a witness mark from the slot in the guide plate. The slot under the rocker stud appears to have made an impression in the surface of the cylinder head. That's nothing but bad.
I've kept quiet because it's hard to have positive/uplifting information in a situation like this. For example, the posts that I've just made aren't being followed up by a simple fix or words of encouragement. It just plain sucks.
Utilizing a shaft system will help to eliminate the possibility of "Thread Pullout" but you'll still need to keep an eye on it. During the shaft system's installation process, be very aware of the "Feel" that you experience as you torque the base to the cylinder head. Torque each fastener slowly and in multiple stages. You can tell alot by the feel.
I wish that I had a solution and/or a sure fire fix, but I don't. You'll just have to be diligent with your inspection process.
Here's my e-mail: [email protected]
If I can be of help, let me know.
Larry S.
http://www.precisionautomotivespecialists.com
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Hi Larry,
If these marks are actually witness marks indicating soft aluminum, can it be fixed? Next time I drop by the chassis shop, I’ll make sure the area is clean and take a good look at it.