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Re: Question on 93 9kt turbo charger Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Thu, 8 Mar 2001 15:04:08
In Reply to: Question on 93 9kt turbo charger, David L, Thu, 8 Mar 2001 03:33:15 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The Ecopower was a low pressure turbo model - only 0.4bar, compared to the 1.0 of the full-turbo car. It came without a boost gauge, and interestingly enough, according to my information, without a BPC.
I'm surprised your car has the combo of no boost gauge but has a BPC. I assume that by the 'BPC waste gate tube', you mean the hose from the BPC (a plastic cylinder with three hoses and an electrical connector mounted on the radiator) TO the wastegate actuator, a metal cylinder mounted by the turbocharger.
First off, a LPT (Low pressure turbo) car has no real noticeable turbo rush. However, if the mechanic says the turbo isn't producing a lot of boost, I'm not believing him. Turbos tend to fail in two ways - an oil seal goes, or the bearings go. If the oil seal fails, you still get boost, but you also get smoke. LOTS of smoke. You don't need someone to drive behind you - if your turbo oil seals fail, you'll know because you won't be able to see cars behind you.
As to a bearing, you'll hear the scrape and whine of the turbo bearing, or in the worst case, no boost at all. The car will be dead slow then.
My guess is that there is a problem with the turbo wastegate actuator. That is the actuator on the other side of that hose from the BPC. That actuator moves a lever on the underside of the turbo, and that lever controls how much boost you have. If that lever sticks, you can have very little boost, and the only problem is needing a little oil squirt. The other possiblity is that the spring in the wastegate actuator is bad, and it moves too easily.
With the car cold, reach under the turbo and feel for a little lever, with a rod on it going to the wastegate actuator. You should be able to move the rod back and forth along its length - not a lot, 1/4 to 1/2 inch (1-2 cm), but some. If it doesn't move, find out why.
Turbos usually don't fail by putting out less boost. They usually fail with large clouds of smoke, or loud squeals of metal on metal.
, Fri, 9 Mar 2001 06:30:00, Thu, 8 Mar 2001 15:04:08 <-- Viewing This Message
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