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General Bobcat Skidsteer Forum
Bobcat 632 - Blown Head Gasket?
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<blockquote data-quote="Ster1" data-source="post: 123909" data-attributes="member: 20800"><p>Those 3m disks are great. I use. em with air die grinders, but a drill works too (just slower). The idea is to remove old gasket material and not any metal. Don't linger in one spot, keep that tool moving. This is one of those situations where close is probably close enough. It doesn't have to be perfect. It's a good thing the head and block is iron. More forgiving of enthusiasm. Just do it like you've done everything else; go slow, watch your progress carefully, and stop and ask when you hit a tough spot. I would suggest extreme caution in using the file method. The guys are not wrong, it's a viable method to detect surface imperfections. It's also real easy to go too far, and do damage. Remember this is not Formula 1, this is a low rpm, low compression industrial engine. It's easier for the head gasket to compensate for a little extra old gasket material than a gouge in the iron. I like your progress!</p><p></p><p>Given that this engine did overheat, there is a fair expectation that the head is warped. Iron heads don't warp nearly as much as aluminum heads, but they do warp. So when it comes time to check for warpage, don't scrap the whole head because one end of the straight edge is on a little blob of old gasket material <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> CRC makes a parts cleaner that I've found is pretty good for helping get old baked on material off. It comes in a green can. I think it's supposed to be eco-friendly. I don't know about that, but I do know it doesn't evaporate as quickly and can soak in and start to break down that old material. It does well for me anyway.</p></blockquote><p></p>
[QUOTE="Ster1, post: 123909, member: 20800"] Those 3m disks are great. I use. em with air die grinders, but a drill works too (just slower). The idea is to remove old gasket material and not any metal. Don’t linger in one spot, keep that tool moving. This is one of those situations where close is probably close enough. It doesn’t have to be perfect. It’s a good thing the head and block is iron. More forgiving of enthusiasm. Just do it like you’ve done everything else; go slow, watch your progress carefully, and stop and ask when you hit a tough spot. I would suggest extreme caution in using the file method. The guys are not wrong, it’s a viable method to detect surface imperfections. It’s also real easy to go too far, and do damage. Remember this is not Formula 1, this is a low rpm, low compression industrial engine. It’s easier for the head gasket to compensate for a little extra old gasket material than a gouge in the iron. I like your progress! Given that this engine did overheat, there is a fair expectation that the head is warped. Iron heads don’t warp nearly as much as aluminum heads, but they do warp. So when it comes time to check for warpage, don’t scrap the whole head because one end of the straight edge is on a little blob of old gasket material :) CRC makes a parts cleaner that I’ve found is pretty good for helping get old baked on material off. It comes in a green can. I think it’s supposed to be eco-friendly. I don’t know about that, but I do know it doesn’t evaporate as quickly and can soak in and start to break down that old material. It does well for me anyway. [/QUOTE]
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