I have a 1989 Jetta 1.6 with 225kms, i bought it 2 months ago from an older man who took meticulous care of the car. Problem is, i have no boost at all or very little like 2psi (yes i have a proper boost gauge) on big hills but hardly ever does it build any. Turbo is perfect and has no shaft play at all.. I'm thinking that the wastegate is stuck and no letting it build any boost? I understand that the 1.6TD's are suppose to hit about 10psi in stock form?
So is there anyway i can adjust the wastegate? Or is it possible to replace it with the turbo and engine in the car? Any detailed opinions would be very very appreciated here! Thanks
i would also assume it's a k24, if not it's probably an exhaust leak some where on the manifold. if it's a k24, u can tighten the wastegate adjustment the whole way and pull the boost line off going to the wastegate and try spraying some penetrating oil in there. when you tighten the adjustment it will push the valve shut, and hopefully the penetrating oil will keep it moving in the future, u should be able to push the valve shut atleast and get your boost back, with out increasing fueling u won't see much more than 15 psi from it anyway, which is very safe. it takes a 3mm allen wrench and a 10mm deep well to adjust the waste gate good luck!