i am new to this forum and have a 91 HB with 174k on motor new to me. the compression is 145 to 150 on all 4 cylinders. please any avise to as why she is burning oil out the tail pipe would be most helpful. idles great and revs excelent. thank you car gods...
Modified by FL.HBODY at 3:59 PM 7/29/2009
Modified by FL.HBODY at 4:49 PM 7/29/2009
91 bolwin smoke please help
Re: (Reverend D)
it burns all the time. little at idle and when you punch it puffs alot. now would the valve stem seals cause the burn all the time? bc i heard that the oil needs time to pool up to come out the stem seals. but if they are real bad would it burn all time like it is now? and the compression leads me to hope that it is not the rings, or valve seats but am prepared to do what ever it takes to fix it.. love my ex cab. thank you so much for the knowledge
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Desert Rat
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Re: (FL.HBODY)
If you've got good compression, it's likely not the rings. bad valve seals will let oil slip through into the combustion chamber and will cause it to smoke.
Re: (Desert Rat)
yea i am in the process of getting new seals and going to install them this weekend. hopefully that is it. other wise the motor is comming out. thanks again guys, lets u know how she goes.
Re: (FL.HBODY)
Compression test is one thing, to test rings versus valves find a shop that does leak down test. They compress the cylinder and see how fast it leaks down. Then they squirt oil in the cylinder and if it leaks down slower it is rings, if it is valves, it leaks down just as fast. The oil in the plug hole will slow leak down if it is rings as it seals it. If it is valves the leak down time is the same.