Valve Clearances 4.2 GU Patrol

G'day Johno,
Assuming you have the updated Gregory's manual# 519 (which covers all of the GU diesels from 1998 to Sept. '04), the TD42 valve clearance adjustment procedure is described in detail on page 99..

In short, with engine at operating temperature, and valves numbered 1-12 from the front,
Rotate engine so that No 1 piston is at TDC on the compression stroke. The TDC mark on the crankshaft pulley will be aligned with the mark on the timing cover, both valves of No 1 cylinder should have clearance, the exhaust valve of No 6 cylinder will be closing and the inlet valve of No 6 cylinder will be starting to open..

Adjust the rocker arm adjusting screws until a 0.35mm feeler gauge slides neatly between the rocker arm and the end of the valve stem on valves No 1, 2, 4, 5, 8 and 9

Rotate the engine 360 degrees until the TDC mark on the crankshaft pulley is aligned with the mark on the timing cover, valves No 11 and 12 have clearance, valve No 2 is closing, and valve No 1 is starting to open..
Adjust the rocker arm adjusting screws until a 0.35mm feeler gauge slides neatly between the rocker arm and the end of the valve stem on valves No 3, 6, 7, 10, 11 and 12...
And there ya have it, hope this helps :-))

All the best in 2007 and beyond.....

Regards, Ed. C

I have a gu turbo 2000 model & was told by a Diesel mechanic 13'' Thou Hot.Try ringing this Diesel mechanic on 0248771256 or e mail diesel@hinet.net.au Hope this helps Garry.