Jos Posted July 4, 2012 Share Posted July 4, 2012 Took the valves out of my cylinder head today and almost all the inlet valves have rust on the stems, in the area where the valve stem seals are. Did anyone else have this, can the valves be saved or do I need new valves? If so, I think a reconditioned head is a better option. Ideas/ options anyone? Quote Link to comment Share on other sites More sharing options...
Dnk Posted July 4, 2012 Share Posted July 4, 2012 Rust ? It would depend if the valve stems are pitted or not, you could try cleaning them with very fine wet & dry paper & WD40, put the valve in a pillar drill and spin it up Quote Link to comment Share on other sites More sharing options...
Jos Posted July 4, 2012 Author Share Posted July 4, 2012 Rust ? It would depend if the valve stems are pitted or not, you could try cleaning them with very fine wet & dry paper & WD40, put the valve in a pillar drill and spin it up Yes, I thought it strange too, they are pitted, will post pics tommorow. I was wondering if anybody else had this. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 5, 2012 Share Posted July 5, 2012 Photos please. Quote Link to comment Share on other sites More sharing options...
mellonman Posted July 5, 2012 Share Posted July 5, 2012 interesting, i take it this must be on the stem near the face/head was you running water/meth injection? you would think any water would of evaporated by the time it gets to the valves Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 5, 2012 Share Posted July 5, 2012 Highly unlikely to be rust, much more likely to be burnt oil deposits from knackered guides. Some modern oils leave rust coloured deposits when they burn. Did it smoke on start up from cold? Quote Link to comment Share on other sites More sharing options...
Jos Posted July 5, 2012 Author Share Posted July 5, 2012 Yes, I had the smoke on startup, and I was not running water/meth, my car was very stock, low miles, but stood still for a long period. maybe it had been started numerous times but not warmed up? After looking a bit better, it are really pits, and few deposits. Here are the pic's, and thank you guys for thinking with me . Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 5, 2012 Share Posted July 5, 2012 That's rust pitting OK, maybe acidic oil through very infrequent changes, or left with water contaminated oil in it for a long period of time. any like that are scrap I am afraid In a serious high revving engine they'd probably have broken. Quote Link to comment Share on other sites More sharing options...
Jos Posted July 5, 2012 Author Share Posted July 5, 2012 Yes I was afraid they were only good for decoration now , on the other hand and if my wallet allows it its a good excuse to get a decent head now. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 5, 2012 Share Posted July 5, 2012 That's nasty. Quote Link to comment Share on other sites More sharing options...
Jos Posted July 5, 2012 Author Share Posted July 5, 2012 That's nasty. I try to see the bright side of it, and am happy that I did not try to replace my valve stem seals with the head on the block, then maybe I would not have noticed this and have more damage later. What I find strange though is that it's only on the inlet side, visualy the outlet valves look fine. Quote Link to comment Share on other sites More sharing options...
mellonman Posted July 6, 2012 Share Posted July 6, 2012 yes that is the best find i have seen, very lucky man could of had to do the job twice and that would be a pita, im still amazed that this could happen goes to show cars need to be driven to burn off water vapour. Quote Link to comment Share on other sites More sharing options...
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