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On 11 Nov 2005 at 12:57, phil cain wrote: > Jim, where the T-4 engines run into problems is > overheating, this will cause a valve seat to sink into > the head which will give the same indications of a > stretching valve. Also you are right , if the T-3 > engine overheats the first sigh is elongated valve > stems on #3. Phil I, personally, have doubts as to whether a valve would ever undergo significant elongation before it broke. Since there is no way to know which happened without disassembling the engine, I was just wondering if anyone knew if valves ever actually stretched, or if this was just the result of someones uninformed conclusion after seeing the same thing I saw last weekend. I have to admit that I did not look closely enough to know if the keeper grooves has stripped as Steve suggested. That's another possibility. I'm just wondering what the chances are that Randy's head is salvageable. His heads appear to be rather new, non-VW replacements, so I suspect the valve guides are fine. It's certainly also possible that these heads are junk and were never any good. I just don't know enough about these parts. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~