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Re: Smokes badley at idle ?
Posted by GSK@SWEDISH DYNAMICS,INC. (more from GSK@SWEDISH DYNAMICS,INC.) on Fri, 5 Mar 2004 10:29:19
In Reply to: Smokes badley at idle ?, Waveman, Thu, 4 Mar 2004 23:05:23
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Waveman!,
Both Jak and Sab bring up a good point re turbocharger and it is typically the turbine oil seal that will be the first to allow bypassing. The typical symptoms are similar to yours as the increase in oil pressures during higher rpm driving followed immediately with the low exhaust velocity/pressure at idle will allow the turbine seal to bypass. The turbine seal is a piston ring and has a designated gap (to allow for thermal expansion) and has a maximum gap specification of .013". This seal typically wears and the gap increases over time. a gap of .015" and up will normally allow for some oil bypassing. In this case a rebuild should be required and a new piston ring will normally bring ring gap down to .08-.013" and eliminate this oil bypassing. We offer a DIY rebuild kit which includes these seals but you could also find a turbocharger cartr. for under $300. We also offer stagger gap oil seal rings for even better oil control but these are generally only needed with a larger T3/T4 hybrid.
Because the oil rings have a fixed gap, many cases of oil bypassing have been brought about by restriction in the return line or an overfilled sump which restricts the return of oil flow at the turbocharger's bearing housing (center). This allows for oil levels to build in the bearing housing past the level of the oil seals and will render similar smoking symptoms. Before removing the turbocharger for rebuild, it may be a good idea to check your oil levels and return pipe (check pipe for dents, restrictions, etc.).
Best of luck and best regards!,
GSK @ SWEDISH DYNAMICS,INC.
posted by 64.12.96...
Posts in this Thread:
- Smokes badley at idle ?, Waveman, Thu, 4 Mar 2004 23:05:23
- Re: Smokes badley at idle ?, GSK@SWEDISH DYNAMICS,INC., Fri, 5 Mar 2004 10:32:19
- Re: Smokes badley at idle ?, GSK@SWEDISH DYNAMICS,INC., Fri, 5 Mar 2004 10:29:19 <-- Viewing This Message
- yeah sounds like the turbo, jak
, Fri, 5 Mar 2004 05:31:10 - i'd say turbo and turbo seals nm, sab, Thu, 4 Mar 2004 23:23:32
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