Valve stem seals?

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Valve stem seals?

Postby tsoob » Sat Mar 01, 2008 6:20 pm

When i am engine braking down hills itere a puffs of white somke coming out my exhaust any thoughts?
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Postby MRDRFT » Sat Mar 01, 2008 7:13 pm

valve stem seals normaly blow smoke at start up or if you idle 4 a long time then take off,i dont have any in my car and i have never had a problem on the hills
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Postby Dell'Orto » Sat Mar 01, 2008 8:04 pm

White smoke is usually oil burning without going through the combustion process, so maybe an oil seal on the turbo? How much white smoke are we talking?
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Postby rollaholic » Sat Mar 01, 2008 8:42 pm

i tend to associate white smoke with water personally!

(though i suppose it should more rightly be called steam)
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Postby cat007 » Sat Mar 01, 2008 9:50 pm

I thought blue smoke was oil being burnt in the combustion chamber and white was oil burnt after the combustion chamber, such as a turbo ring/seal gone etc?
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Postby tsoob » Sun Mar 02, 2008 12:16 am

not a huge ammount of smoke white smoke tho when i come on to vac when going down the motorway earlier today and sam said he saw it wehn he followed me tonight.
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