What i thought was a MAF prob appears to be a toasted exhaust valve as the #1 cyc. has no compression. any thoughts out there as to what causes exhaust valves to go? excess heat for sure, but what causes that? I have had leaking valve guides which means from time to time oil levels have gone down. perhaps that's the culprit.<p>Im gunna keep the car for a daily driver for our daughter in years to come, so i don't mind repairing it... as original owner, i know every repair and maintenance factor and its a top car running wise. Until a good diesel product comes to our shores, she's gunna keep on keepin on for us..<p>thxs..