Quote:
Originally Posted by Aiden
...I would guess that it's either a tired turbo or something that would only limit to end performance (3 notch gasket?).
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Going with your guesses, It's easy to verify.
Easy to splice in a boost gauge into the tubing that runs from the intake manifold to the IP LDA. Boost under load should start developing around 2000 RPM and reach full boost 10-11 PSI at full load 3000 RPM.
Head gasket notches or holes can easily be seen at the gasket portion that extends out, under the upper radiator hose flange. However, even if you find a 3-notcher, you can't really be sure it is actually too thick unless you measure the piston protrusion from the deck. Ask your mechanic if they did in fact to this, as opposed to just grabbing the (more easily obtainable) 3-notcher.