924Board.org

[924OZY]

Hello,
I have just tried to do the timing on my 79 924na and have found that when the timing light flashes the timing marks are about 180 degrees out.

Also when the cam marks line up, the timing marks are also 180 out on the crank.

It as all done dodgily by the previous owner, but How do I fix this?

It still runs, drives, and can spin em off the line, but I cant do the timing till I sort it out.
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924 N/A snailshell, superpro linkage bushes, 2.5"exhaust

4.0L ef Fairmont, 3000rpm stall, shift-kit, J3 chip, 3" exhaust, self tuned using tunerpro, soon to be boosted,
expecting 350Kw at wheels at 10psi.

[Harm]

[924RACR]

I would wonder if the plug wires are properly connected?? Perhaps the best thing to do is start from scratch, reset everything.

Turn the engine till the crank pulley mark lines up, then do the final set of the crank by lining up the marks on the flywheel (visible through the window in the bellhousing, at the back of the block under the ignition coil).

Then either verify that the cam's timing marks line up, or move the cam till they do (obviously after slipping the belt off). If you do have to move the cam, be sure the timing is correct AFTER setting the tension.

Most likely those are correct, though.

Once the cam and crank are set properly, remove the distributor cap. The ignition rotor should be pointed at the rear-most bolt on the intake manifold. I'm guessing it probably isn't. If it isn't, you'll need to remove the distributor entirely (after removing the hold-down clamp) and reinserting it so that it does point there. Keep an eye out for a small paper gasket that goes under the distributor - easy to tear or lose, will make a small annoying oil leak down the backside of the block if it's gone.

You will then need to put the ignition wires in the correct location. Obviously, the terminal above the rotor, when properly installed, should be #1. IIRC, they proceed counterclockwise from there around the cap, 1-3-4-2 (Zundfolge!!!) as marked on the valve cover. Unless someone cares to correct me here - this is from memory.

Then you need to get the car started; since you've removed the dizzy and reinstalled differently, you'll need to reset the timing. You may even need to try with the distributor body at different angles till she starts. Obviously, once she's started, you can set the timing with the light.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

[Ozzie]

Clock wise
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[924OZY]

Thanks for that.
It turned out that the PO has installed the flywheel incorrectly.

So I checked for TDC with a pencil in the plug hole,
Marked it on the Crank Pulley, (there were 3 little dots there I think)
(this varified cam timing was correct, as mark on cam pulley lined up to pointer)
Then did the timing using the mark on the front pulley.

This is what I am used to,
And it makes sense,
because the Crank pulley cant be fitted the wrong way!
_________________
924 N/A snailshell, superpro linkage bushes, 2.5"exhaust

4.0L ef Fairmont, 3000rpm stall, shift-kit, J3 chip, 3" exhaust, self tuned using tunerpro, soon to be boosted,
expecting 350Kw at wheels at 10psi.