Another Valve Adjusment Question..
 

When adjusting the valves can I just look at the position of the cam shaft and make sure the rocker arm is on the low side of the cam indicating that the valve is closed and then adjust the valve from that point ?



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• Joe A.
• 84 911 Targa
• 75 914/6 3.0

the marks on the crank pulley are used for valve adjustment as well as other things. use them like everyone else does.

Do all the pulleys have marks.... beside the Z1 mark ?

This is on my 3.0 914/6 so it may be hard
to see but if they are there I will go looking for them...

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• Joe A.
• 84 911 Targa
• 75 914/6 3.0

I adjusted my valves in the way that whenever there was one rocker loose i adjusted it. You can do it in any order...At least I did.

Yes, there are marks every 120 degrees on the crank pulley. You just start with Z1 and do intake and exhaust, and then turn the crank 120 degrees, and do the next cylinder in the firing order. Rinse, lather, repeat.

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Mark Szabo
1986 911 Targa 3.2
1987 Escort 5-speed 1.9 RIP
The Porsche Owners Gallery

Hi

I was able to find the marks... Put a 5x7
mirror between the firewall and the fan with a large light bouncing off of it and was able to find the 120 degree marks put a drop of red paint on each one. Remeber that on a 914/6 the engine face the other way...
Makes it a little tougher...

Thanks

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• Joe A.
• 84 911 Targa
• 75 914/6 3.0

I'm not sure if John Walker disagreed with this above, but you can usually adjust a valve any time the rocker arm is on the heel of the lobe. At any given engine position, there are probably six or eight valves that can be adjusted. In theory.

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'83 SC

i like using the distruber, you simply take the cap off a little and go to the cylinder where the rotor is pointing to.

Yes, Superman is correct. Any time the rocker is riding on the heel of the cam, you could adjust the valve.

I do that all the time on my BMW straight 6. But, its a lot easier on the BMW, since you are working from the top of the car, and the cam and the rockers are right there in front of you. I just leave the car in 3d gear, push the car back a bit until the cam is in place to do the first cylinder, make the adjustment, bump the car until the second cylinder is set, etc. Piece of cake, and its foolproof because the camshaft is right there in front of you.

On a 911, though, where you are working above and below the car, with minimal visibility, it seems safer and easier to use the standard method.