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-   -   16V cam timing question (http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/177236-16v-cam-timing-question.html)

marko 08-12-2004 12:46 AM

16V cam timing question
 
Is there an easy way to time the 16V cams?
Any way to do it without the dial gauges?

I've read this post by Overkill, but it's a little confusing to me.
The manual is not clear either.
http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/90124-ok-cam-timing.html

The large cam sprocket has a notch larger than the woodruff key, I would think the key needs to be against the left side of the sprocket notch to help keep the gear from spinning. From the old washer marks and back plate marks, it looks like the key was at the middle of the gear notch.

944 Ecology 08-12-2004 03:34 AM

My post in the other thread explains it...

You have to tweak the timing until the engine works best.

It is somewhere in the center of the range, not at either end (my personal experience).

gb

adrian jaye 08-12-2004 04:16 AM

you people scare me !

16v engine, busted, lots of money fix !

dont be a stingy scrooge, get the job done right !

mike944 08-12-2004 06:04 AM

Marko,

Just line it up the best you can using the washer marks on the front of the cam gear.

There is no way to set it exactly without the dial gauges. Even with the gauges, the procedure is difficult and confusing.

Mike

marko 08-12-2004 07:15 AM

Yes, even if I did have the gauges the procedure is a little confusing to me.

If I get it close, turn the crank by hand and the valves don't touch, will I be ok?? (until I can get it to the shop and have them check it)

mike944 08-12-2004 07:43 AM

As long as the timing mark on the cam gear is lined up correctly, the valves should not contact the pistons anywhere within the cam adjustment range. The only thing that will happen if your cam timing is slightly off, is you won't be able to get 100% power out of it. you might get 96-98% or something like that.

It's ALWAYS a good idea to turn the engine over at least 2 full revolutions by hand, feeling for anything binding or hitting. This also "seats" the belt. Make sure the timing mark is still lined up properly after turning 2 revolutions, and re-check the belt tension after the belt "seats". Always turn the engine in the direction of rotation, which is clockwise when standing in front of the car, looking at the engine, CCW from the driver's point of view.

I always turn the engine around a few times by hand after making any tension adjustments, and recheck. I also start the car up with the belt cover off, let it run for 30 sec or so, then recheck the tension, but then again i'm A.R. about getting stuff exactly perfect.

marko 08-12-2004 07:50 AM

Oh, 944 Ecology, I just saw you new post on Overkills thread.

The thing that confused me before was that I got the impression that he had the cam gear all the way to the left and got the timing marks to line up.

Could I get a good coarse adjustment by having the lobes for cylinder #1 facing each other exactly?? then move the cam gear so the timing marks line up?

marko 08-12-2004 07:54 AM

Oh, hey, mike944, guess we were typing at the same time.
Thanks for the reply. Would having the lobes for cylinder #1 facing each other exactly be ok for TDC on the cams?

marko 08-14-2004 07:29 PM

Never mind... it worked ok. Started up just fine.


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