L head firing order/ cap

Hey,
Does anyone have any idea about the cylinder order on the distributor cap for a cyl L head. I know that the firing order on the head is 1-3-4-2.
What I am trying to figure out is where #1 is on the cap and if it is a clockwise or counterclock wise order?


Thanks,
Dave

 

Most engines i've dealt with are clockwise. Only for sure way to find # 1 cylinder is take out the # 1 spark plug and turn the engine by hand till the cylinder is near the top. Try it there. If it doesn't work you are 180 degrees off. Cylinder is at the top twice in the 4 stroke cycle.

 

the distributor rotor rotates counter clockwise.

engine rotates clockwise

1-3-4-2 is correct

Number one could be about anywhere.

Rotate engine until you get number one at top dead center. that sounds easier than you might think

Here are some tips

remove #1 plug and rotate engine with starter till you get a puff of air from that cylinder. They make whistles that screw in place and whistle when engine is approaching tdc

here is a sure fire way to do it although it is a little more work. remove side valve cover from engine and rotate engine with a wrench on the bottom pulley nut.

Now, while you have the cover off you could look for the moment when the #1 intake valve closes -- that would be the beginning of the compression stroke and not yet tdc. As you turn the engine further watch the number two valves. At the point where the #2 exhaust valve opens opens you are at or near tdc on #1. At least at that time you are close enough to identify #1 on the distributor. When the #2 exhaust valve opens the #1 cylinder is firing and the rotor should be aligned with the #1 spot on the cap.

Then simply follow 1-3-4-2 going counter clockwise.

Oh, by the way the valves are as follows

cyl left right

1 exh int
2 int exh
3 exh int
4 int exh


kamel

 

If I am looking at the head from the front of the vehicle, is cylinder#1 closest or farthest from me?

 

If the 134 is like other inline engines, cylinders are numbered from the front to the back.

Wasn't it here that I heard about the balloon trick? Break the center out of a spark plug, screw it into the #1 cylinder and put a ballon over it. Rotate the engine. The balloon will inflate on the power stroke. I haven't tried this but it seems that it would work.

 

what Glenn said

 

The balloon idea is a great one!

I would not guess at the #1 location. It is true that the distributor is keyed into the oil pump off center so that it can go in only one way, but the oil pump can go in any way in the 360 degree rotation that it wants to.

So, while the distributor can go in only one way the oil pump can go in any way -- result is that #1 is unpredictable unless you have owned the jeep since new and can vouch that the oil pump has never been taken out.

good luck --