Outer Limits 4x4 Board

hello all,

i have been trying to locate the timing mark of my sd33t. is it in the crank shaft pulley? pls help. tia

the mark is on the front pulley, and a mark on the camshaft chain cover to align it with.
A little dodgy to see, though....

totto wrote:the mark is on the front pulley, and a mark on the camshaft chain cover to align it with.
A little dodgy to see, though....

thanks totto, i see a pin on the chain cover. should i align this with the two drilled holes on the pulley? please bear with me as i really want to get the exact timing position when i do the valve tappet adjustments. many thanks again.

Firstly the sd33/t cam and pump are gear driven and secondly if all you are doing is adjusting valve clearances you probably don't need to have the timing at the exact mark i.e. -
say you are adjusting a rocker (for valve clearance) the cam lobe will only be pushing on the pushrod for about 90 degrees of the cams rotation (180 of the crank), the remaining 270 degrees of the cams rotation (540 of the crank) the valve will be closed and clearance will be evident.

If you then realise that as the exhaust close the inlet starts to open you should be able to figure out when the lifter is at the opposite side of its corresponding lobe, failing that you could turn until it starts to open, then go back 270 degrees on the crank and that would put it ready to adjust...

Its sounds hard but all falls into place when you're doing it.

budz wrote:

totto wrote:the mark is on the front pulley, and a mark on the camshaft chain cover to align it with.
A little dodgy to see, though....

thanks totto, i see a pin on the chain cover. should i align this with the two drilled holes on the pulley? please bear with me as i really want to get the exact timing position when i do the valve tappet adjustments. many thanks again.

Sorry, my manual is in the car, the car is a hundred miles away while my drivers licence is in the care of the police for three months (penalty for driving 118 km/h in a 80 km/h-zone )and i can't exactly recall the position from my memory.

However, when i'm adjusting the valves, i use the old "valves shifting meaning valves resting"-method.
That means that if you turn the crank until the valves of the sixth cylinder is "shifting", i.e. exhaust is almost closed and intake just barely starts open, that's when the valves of the first cylinder is "resting", i.e. the cylinder is at it's top dead center between the compression and work-stroke and that's the position in which the valves should be adjusted.
In a six cylinder like the patrol engine 1 and 6 moves similar, 2 and 5 moves similar and 3 and 4 moves similar, i.e. adjust 1 while six is shifting, 2 while 5 is shifting, 3 while 4 is shifting, 4,w hile 3 is shifting and so on. Works fine on my engine...
Beware of worn rocker arms with scores where the rocker arms touch the valves, scores can result in wrong adjustment and ticking noise like i have in mine......