uh well you have to shave the valve seat in three seperate angles. I think it is 31/46/60 and i cna't particularly remembver if you need to take everything apart but just imagine remmoving your head from your car.
That's how much work it is.
so fdor a supra its romving intake, cooling system, exhaust, and many things like egr, vsv's, and a buncha other things i can't ermember.
almost everything but the block. a good 10 hours of labor with the right tools and know how
then its like $200 to havfe it angles done at a machine shop... a good priced shop at that.
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Its broke, it could be anything, and cost of repairs will greatly exceed the value of the car
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