My 98 Frontier with 165,000 digested its lower timing chain guide and tensioner. All of the intake valves hit pistons and new aftermarket intakes have been installed. The exhaust valves were reseated along with the intakes, the head re assembled on the bench. The exhaust valve clearances ranged from .010-.012. My plan is to get these into spec by lapping the shims on a diamond hone to bring them all to about .013-.014.
The new intakes ranged from .023-.033 I am considering re-lapping the ones that are the furthest out, but even with that I will need shims. The shims I need used to be available and there is a website that lists exactly what I need but I think is in Austrailia. I would like to get this motor back together and may try to contact this company (MD Spares) unless there is still a US source. Any help would be greatly appreciated.