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#1 How much is too much?

Posted: Tue Feb 18, 2020 9:58 am
by Walluski
Greetings,
When I start my 72 Series 3 2+2 from cold, I always get some light gray smoking out the tail pipe. It lasts for about 3-4 minutes, getting progressively lighter until it stops. After that, the exhaust is clean (at least to the naked eye). Other than that, the car runs well and sounds good.

In the cold weather, I also get lots of steam and moisture (see photo) that carries black residue to the ground.

I'm guessing this means that I'm burning oil somewhere but is it worth worrying about? I realize this is symptomatic of some problem, but I'm not a mechanic and before I spend a small fortune on new valve guides or piston rings, I need some sense of proportion.

Thanks in advance for your advice.
Mark


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#2 Re: How much is too much?

Posted: Tue Feb 18, 2020 10:17 am
by christopher storey
That is not oil burning ( which produces blue smoke ) and is nothing to worry about . It arises when the hot gases impinge on the cold exhaust system ,the water vapour within them immediately condensing on the metal. Gradually as the system warms the condensate is expelled along with a degree of carbon which is the black you can see

#3 Re: How much is too much?

Posted: Tue Feb 18, 2020 10:48 am
by malcolm
I always get that. If I park stern to my daughters house, she puts cardboard behind my car so I don't cover her walls. I always feel sorry for people who park clean cars tight behind me on a ferry on an overnight crossing! :oops:

#4 Re: How much is too much?

Posted: Tue Feb 18, 2020 11:44 am
by Woly64
Same for me - discovered the hard way when moved to a new house with white painted wall on the drive and next to the garage! :doh:

#5 Re: How much is too much?

Posted: Wed Feb 19, 2020 5:02 pm
by Walluski
Thanks all.

I'm filling a swimming pool with everything I don't know about E-Types.

Thanks again
Mark

#6 Re: How much is too much?

Posted: Wed Feb 19, 2020 5:06 pm
by malcolm
Mark, I've stopped worrying about exhaust gunk and just keep an eye on Oil pressure and oil consumption.