Valve guide seals

[Phil@sievers.com (Phil Payne)]

In message <19970326144840.AAB19434@localHost> "Mark Pollan" writes:

> I gotsa turbo with the nice puff of blue.  Definitely my least favorite
> color of exhaust!

Turbo smoke tends to be blacker and come in a rush after startup -
there's less on the open road.

> How do I isolate the culprit?  Change the valve guide seals and see
> if puff goes away?  If it doesn't, what is the prognosis for the turbo?

a) ALWAYS if you suspect a turbo - pull the turbo ==> intercooler hose
   at the intercooler end and have a good feel in the intercooler and
   also in the hose.  They're always 'orribly slimey and oily - but
   check for grit and filings.  A small nut is _real_ bad luck - it's
   the impellor retaining nut.  BTDT.

b) Change the valve stem oil seals.

If it still smokes and there are no combustion products getting to the
oil, suspect the turbo.  They don't often make more than a couple of
thousand miles after they start to leak.  Most frequent reason is
not allowing the turbo to cool properly after "spirited" driving.

--
 Phil Payne

 Phone: +44 385302803  Fax: +44 1536723021  CIS: 100012,1660