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Rowdy Yates
05-16-2004 20:48:56
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Re: 860 power problem found!!! in reply to Chris, 05-16-2004 20:21:41
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I would have it checked if it were mine, it may not need resurfaced, but I'd have it checked anyway. But of course, ....back in the day....engines had alot more "meat" to them and could withstand alot more abuse than newer heads, so you might get away with it? I probably would chance it. Alot of newer engines, if it even looks like it got hot, it needs a new head gasket and possibly some reworking and/or a new head. Problem with "resurfacing" is that you're changing the compression and such because you're making the combustion chamber smaller. I have been known to take a head (usually on smaller engines) and place sandpaper on a perfectly flat surface, then put the head on it and sand it down, this should also immediately show if there is a big "warpage" problem also. But it may be hard to do with a larger head. A piece of sandpaper that big may be hard to find and a flat surface that big? At the least, I would lightly sand off the surface to get rid of any build up, being very careful not to damage or to make the head "unflat". Is that a word? LOL! Another thing to consider is, if you were to have it surfaced....all the valves half to come out, etc. Then you might as well have a "valve job" done, etc, etc. The next thing you know...$$$$$$$ I don't know if anyone would resurface with all the valves in or not, but if they did...I wouldn't want it done that way, too many metal shavings would be in the workings for my liking. One final note: Is there any markings on the head surface..such as a "10" or "20"? Usually if a head has already been surfaced, most shops will stamp the amount that it was shaved on the surface of the head, so be careful, it may have been surfaced before and your combustion chamber keeps getting smaller. Just somethin' to think about, Let us know how it goes!
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