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The best permanent fix is to rework the head - new valve guides pressed in, new valves, resurface the seats, etc.And Welcome to Allpar!
How about the springs? were they checked or replaced?Ratte said:The head was reworked 15000 miles before, all new guides, valves grinded, fresh seals, new gasket etc.
Actually I didn't read that yours was a 2.2 Turbo until I just re-read the thread. My bad. There are a few differences in the head IIRC, but I don't know if it includes the guides or valves or springs. Is it possible that the re-work had unintentionally used some parts from a TBI setup that might differ slightly?Ratte said:I think the springs were checked, the rework was made by an authorized chrysler dealer. But I can not guarantee it, it is years ago.
I'm planing now to put out the spring, check it and check the valve whether it is freely turnable. What do you think?
@John: Why do you make a difference between 2.2TII and 2.5 in this case? Do 2.5 valves stuck more often?
I know it sounds unusual but I have personally experienced this situation. I'm not saying for certain this is your problem but it's something to consider. After it happens a time or two the seat will eventually not pop back in position but end up crooked and the valve stays open.Ratte said:Randy: this idea I had, too. But my mechanic, with whom I discussed that, meant the valve would not snap up so easy then, cause the seat rings are pressed in normaly really strong. But I'll try to have a look into the cylinder through the plug hole with a endoscopic camara. Perhaps I can see something. Thank you all for your hints!
Seems like the diagnosis was confirmed!!Hemi-Dude said:Randy is on the right track. As an engine builder, I can state categorically that the valve seats can and do sometimes come out of the head. This would require the re-fitting of another valve seat and grinding of the new seat. It would only be necessary to do the one (1) valve seat. I have had machine shops do this for me over the years.