Re: blue smoke under high rpm deceleration (archive)

With a minimum of 208k on your engine I would think a complete head recon is in order.
I would try Peter's method of replacing the seals just to see what happens and maybe that would do the trick. But, the liklihood is with a high mileage engine like yours the guides will worn beyond spec. If your planning on keeping the car for a while, pulling the head is something that you would do anyway (sometime down the road).
Is there any chance the head has been done before? Maybe re/reing the seals will be enough if the PO has had the head recon'd in the past.

HTH
bob

I get blue smoke (oil burning) from the exhaust under high rpm deceleration. I don't get this at any other time. I've got a 79 320 with a 32/36 DVAG carb that runs pretty clean, accelerates and idles very smooth. I've had this car only for about 1000 miles but it had 208,000 on the clock until I re-hooked up the speedo cable, so who knows... If I pop the oil cap and look inside it is really clean. No carbon or tarnishing on the cam, etc. Ok, now my question.

Do you think the valve guide seals are the cause of the blue smoke? If so, must the head be removed to replace them? Is it something that can be done by the home garage mech or is it best left to a shop?

What other possible sources do you think could be the cause of this oil getting sucked into the combustion camber under deceleration?

Thanks, Matthew

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