Pin holes in the head sealing surface..., Can I run as-is, or should they be welded up? |
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Pin holes in the head sealing surface..., Can I run as-is, or should they be welded up? |
jhadler |
May 15 2009, 11:21 AM
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#1
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Long term tinkerer... Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 |
Hey all,
The motor is going back together, and upon close inspection of the heads, there are some small pinholes along the sealing surface of the head. I'd like to drop the head gasket and lap the cylinder to the head, but will these holes be a problem? Based on the measurements, the pinholes will be 0.016" outside of the ID of the jug, and as such, covered by the jug. But is that enough? Can I run this as-is? Lap the jugs to the heads, and run sans gasket? Should I run I gasket? Or should I have the holes welded up and re-flycut the heads? There's all of about 40 minutes run time on these heads right now. Thoughts? Experience? Thanks! -Josh2 |
HAM Inc |
Jul 1 2009, 05:14 PM
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#2
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
This head had a pin hole in the same area. Money was tight so no repair was made with the hope that the stud would contain the cylinder pressure. Made it 20 minutes! It blew the stud and you can see what happened after that! While it's true that this engine had quite a bit more compression than yours probably does, and while it is also true that I have seen a lot of heads that ran for a very long time with pits in this area, it only takes one experience like this for me to take a stand against risking it. My earlier statement that you probably wouldn't have a catastrophic failure may not be such good advise. Proceed with extreme caution! I think the best advise I could offer would be to fix it right. If that means putting the project on hold and saving some money then so be it. |
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