hey all how are we?
My mate has a blacktop 20v and the tappets on it are a bit noisey..
ne ways does ne 1 know ne 1 who has done a lot with the engines and would know how to adjust them?? Me and my mate both know how to do tappets but 20vs have shims somehting we both havent done b4.. And to adjust them u have to replace them form what we know.. ne 1 help us out??? Thanks
Get a set of feeler guagues, and measure the clearance between each shim and the base of the cam lobe(not the point end). These are pretty general toyota specs, and the 20 valve could be different. But anyway:
The intake cam clearances should be within 0.15mm-0.25mm
and exuast clearances should be within 0.20mm-0.30mm
now after you have gathered your results and most likely found some out of spec clearances, you can use this formula to find out the correct thickness shim to replace the worn one.
T=Thickness of shim used
A=Valve clearance measured
N=Thickness of shim new
20v tappets
Sun, 24 July 2005 08:30
