Cam Timing - 2.0 9a 16V with KR cams

[Gareth_16V 0]

Hi all,

 

I have just bought a 1995 2.0 16V Corrado. The previous owner had a pair of cams from a KR 16V fitted, along with a chip, and with this setup it apparently made 166bhp on Stealth's rolling road. Sometime after this he has had the cam belt changed.

 

When I got the car I was less than impressed with the throttle response, and the light-load running of the engine. Under full load the car pulls cleanly, but the power falls away just on 6000RPM. So today just out of curiosity, I decided to whip off the inspection plug from the gearbox, the top cam belt cover and the dizzy cap.

 

Using the flywheel notch/mark, I set the engine to TDC. The rotor arm points right at the notch in the dizzy body. But the mark on the cam sprocket is 1 tooth advanced from the arrow cast into the cam cover. Please see the pics below (if they've linked properly- quite new to this posting malarky!!)

 

Is this correct with KR cams - do they need to be set up advanced? Or has someone fitted the belt incorrectly? It would seem to me that the ignition timing should be about right, but I'd be really grateful if someone could confirm this.

 

 

Many thanks in advance

Gareth

[Supercharged 2]

Nah thats wrong, static timing needs to be as per factory with the KR cams.

 

16V cam timing is easy so the belt was obviously changed by a muppet - if it was a garage then it wants burning down!

 

You should be able to correct this without doing a complete belt change but I would also check the cam to cam timing!

[Gareth_16V 0]

Right. I have read previous posts regarding this and was getting confused about whether the TDC mark on the flywheel is a dot or a notch or ???. This one seems to have a line scribed in, as per the picture.

 

So is the ignition timing out or just the cam timing?

[Supercharged 2]

Ah wait a minute - the mark on the flywheel should be a O rather than a I - the line is the 6 degree mark for timing.

 

Back at the cam side, does the line on the crank drive belt pulley line up with the arrow on the outside of the lower plastic cover??

[Gareth_16V 0]

Tried lining the mark on the pulley up with the arrow on the lower timing belt cover, but I couldn't see anything on the flywheel.

Does this just mean that the car has had a new clutch - thus a new flywheel - at some point?

 

Thanks ever so much for your help. I will check it out tonight.

 

I thought that the timing being out would explain why the car doesn't feel "happy", there's not much response when you "blip" the throttle, and not much go below wide throttle openings. I wondered if it was the design of the throttle body, but I don't remember my old mk2 8V GTI Golf being that way.

[Supercharged 2]

Hmmm... the flywheel should be more accurate but both this and the pulley at the other side only go on one way.

 

How close are you to Stealth?

[Gareth_16V 0]

Not that close - currently located in sunny Basildon, Essex.

[Supercharged 2]

Ah ok - just thinking it could do with being checked by someone who really knows these engines...

 

Have another look later and try and see the other flywheel mark - when the crank pulley mark is lined up does the cam also hit the mark??

 

Other thing to do is to check TDC by using a long screwdriver down the sparkplug hole.

[Gareth_16V 0]

I completely agree. I've had and worked on VWs successfully before but always of the 8v variey. Damn this new-fangled multi-valve technology...... :wink:

 

Well that'll keep me busy this evening!

[Supercharged 2]

Have a look at this thread for the autodata -

 

viewtopic.php?f=1&t=52131&hilit=16v+timing+marks

[Gareth_16V 0]

I'd like to say thanks for all the help on this thread.

 

This evening I decided to sort this issue, so off out I went.

 

After a spot of to-and-fro rotation of the crank (I was on my own) I found my "O" mark on the flywheel, after lining up the front pulley notch and the lower belt cover as recommended.

 

 

The cam was still one tooth advanced.

 

 

So I marked the distributor for reference, undid the cambelt tensioner and retarded the cam timing so that both marks lined up, then reset the cambelt tension. Lucky I kept that home-made tensioner tool I used on the Golf.....

 

Car starts and runs much healthier now - it actually responds when you blip the throttle too :D

Driven it round the block, and it feels much smoother and willing, but obviously going to get the timing and the idle mixture reset before it gets any major grief!

 

Just wanted to say thanks for the help.

Gareth!

[Supercharged 2]

Nice one mate! :thumbleft:

[flusted 0]

Have you lined the rotor arm back up with the line? also i think the 2l 16v throttlebody small butterfly has the wedge on it so response will be slightly worse

[Gareth_16V 0]

Yes, I have lined up the rotor arm with the alignment mark in the dizzy body. I understand that this is just a base timing setup, and that I need to get it checked properly.

 

Where is the wedge? And does anyone know a decent Bosch injection specialist in the South East area?