So i recently purchased a roughly 110k mile m20b25 from a local salvage. in my opinion it took way to long to get the engine (it needed some head work). they did refunded my core and I got to keep my original to rebuild for a future project, so the time delay is no longer an issue. the issue is I got the engine in and opened the valve cover to adjust valve timing. I got to cylinder #6 intake valve and maxed out the eccentric and still had around .040" gap. looked around and found what I had assumed was a poor casting mark due to being told "everything is good just needs valves adjusted" was actually a crack. I drove back by the shop and the owner was in a rush and asked me to send him the pictures and call him in the morning to figure out what we were going to do. He mentioned knowing an aircraft aluminum welder that could probably take care of it. I don't really like the idea of welding this "good engine" to make it work, and am leaning towards telling him to get me another head. but what do you guys think about a weld repair in this location?
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You've got to pull that head to weld it and while there are lots of examples of that repair surviving,this seems to be "not your problem" so I'd ask for a good core then discuss how much they should kick in for your trouble, parts and machine work.Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com
https://www.r3vlimited.com/board/sho...86#post4944786
Alice the Time Capsule
http://www.r3vlimited.com/board/showthread.php?t=360504
87 Zinno Cabrio barn find 98k and still smells like a barn. Build thread http://www.r3vlimited.com/board/show...20#post3455220 -
thanks for the reply. I was having trouble finding any weld repairs in this area of the head.Comment
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new head for sure...Comment
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A timing belt failure will do this- the bosses sometimes get busted. That's not the sort of thing you should get to deal with on a 'good core'.
Another vote for 'new head!'
tnow, sometimes I just mess with people. It's more entertaining that way. george gravesComment
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Happens to a lot of heads, as mentioned it could have been from a timing belt failure, but when that happens they usually break on both sides and you have a loose piece floating around. I have seen this on engines that clearly had original head gaskets. There's a few bosses that are weaker where they were drilled for the rocker shaft oiling, simple repair, but since you paid for a good core, it's at your discretion what to do with the wrecker you purchased from.Comment
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thanks for the feedback. The guy I got it from didn't seem too happy about me not letting him weld it, but is looking to see what other heads he has.Comment
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