I have what I think are bad valve guides on my 67 Mustang with 200 six. The engine has about 20,000 on the rebuilt engine. I have had the car for many years so pretty good at fixing it but this one has me stumped.
I have done full tune up, compression test (good numbers) and rebuilt the carb. I also pulled the valve cover and confirmed the rubber seals are in good shape and not cracked and made sure PVC is functioning properly and not sucking up oil.
The car oil fouls #1 and #3 cylinders quickly like in about 30 miles of driving. Yikes! Will develop a miss and rough idle. Otherwise runs great with no smoke that I can see. I see no oil in the coolant or coolant in the oil so don't suspect head gasket. Wish it was as that would be a relatively easy fix.
Pretty much convinced at this point that my valve guides are shot / worn on those cylinders. Maybe not done right during the rebuild? I'm in the CA bay area were it doesn't get to hot or to cold. Can I run straight SAE 40 in my car without causing problems? Want to see if it will help and if it does it may further confirm that it is the guides. Could also be stuck oil rings I guess.
Having a hard time finding a mechanic in my area that will actually work on an old car believe it or not. Hate to pull the head but will try and budget for that.
I have done full tune up, compression test (good numbers) and rebuilt the carb. I also pulled the valve cover and confirmed the rubber seals are in good shape and not cracked and made sure PVC is functioning properly and not sucking up oil.
The car oil fouls #1 and #3 cylinders quickly like in about 30 miles of driving. Yikes! Will develop a miss and rough idle. Otherwise runs great with no smoke that I can see. I see no oil in the coolant or coolant in the oil so don't suspect head gasket. Wish it was as that would be a relatively easy fix.
Pretty much convinced at this point that my valve guides are shot / worn on those cylinders. Maybe not done right during the rebuild? I'm in the CA bay area were it doesn't get to hot or to cold. Can I run straight SAE 40 in my car without causing problems? Want to see if it will help and if it does it may further confirm that it is the guides. Could also be stuck oil rings I guess.
Having a hard time finding a mechanic in my area that will actually work on an old car believe it or not. Hate to pull the head but will try and budget for that.