Quote:
Originally Posted by lord rigatoni
jeez man no wonder your 4runner feels sluggish, thats some serious compression loss. id check your valve seats and your valves to see if any of them are burnt. your piston rings could also be fried as well so yeah it may be time for a rebuild. if you have the tools you could do it yourself, rebuilding engines can be a good time.
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You can narrow that compression leak down to rings or valves with a leak-down test. See where the air is going. If it comes out the block breather, it's the rings, major rebuild needed. If it comes out the intake or exhaust, then it's valves, much less involved to fix.
