I am about to do my valve clearances on a GU TD4.2t and need to know if they are done hot or cold. I searched and found 13 to 14 thou is the go but no one says what temp to do them at. My GQ TB42 I always did hot but not shore on the GU.
3) Valve adjustments should be done with the motor cold.
A12 valve clearance [Forum - Classifieds] : Datsun 1200 Club.10 and .12 would be OK if set when engine is cold ..
I have the Nissan A12 factory manual. It agrees with 1200rc:
Hot:
intake: .35mm (.0138)
exhaust .35mm (.0138)
Cold:
intake: .25mm (0.0098)
exhaust: .25mm (0.0098)
But Clymer and others say don't set it cold -- always Hot. When I used to do it, I did .013 in. cold, they were quiet. I always looked for a semi-tight fit (some drag, not loose, but not a really tight fit).