petemcr 2 Posted January 13, 2014 Report Share Posted January 13, 2014 Hey all, Hoping someone on here can give me some advice on this, I've just had to replace the headgasket on my 93' VR6, so the heads on now and I've come to time up the head, I've got all the timing marks aligned, the Intermediate notch is in view, the cam alignment tool is in place and the engine is at TDC So I've put the chains on, temp fitted the cam cover with the tensioner bolt in place and tested the timing and sure enough after 2 turns of the crank the came alignment tool slotted back in place no problems, but it felt like there was a slight bit of slack on the chain on the sprocket closest to you, where the dizzy would be. Asked a friend to give a hand as he's a mechanic, he came round and fitted the sprockets again but had the chain tight, turned it over again and the cams look to now be out, probably by a tooth or so. My question is, should there be any slack on the tensioned side? and has anyone got any tips on fitting them and keeping the chain tight. Cheers Link to post Share on other sites
Therusterman 59 Posted January 13, 2014 Report Share Posted January 13, 2014 I believe this can be caused by the cam chain tensioner-this operates in oil pressure from the engine to tension the chain. Link to post Share on other sites
Lukey. 381 Posted January 13, 2014 Report Share Posted January 13, 2014 Bleed the tensioner bolt by putting the piston down into a cup of oil and pump it so it fills with oil and it should apply more tension to the slide rail Link to post Share on other sites
petemcr 2 Posted January 13, 2014 Author Report Share Posted January 13, 2014 So is a little bit of slack Ok on the guide rail side? I don't mean really loose but just a slight bit? I know there is not meant to be any slack between the two cam sprockets but I was under the impression the chain on the guide trail has to be tight. I just want to be sure before I start to assemble everything back up to be turned over. Cheers for the reply's Link to post Share on other sites
Therusterman 59 Posted January 14, 2014 Report Share Posted January 14, 2014 Hope you get it sorted, let us know how you get on Link to post Share on other sites
petemcr 2 Posted January 14, 2014 Author Report Share Posted January 14, 2014 Hopefully I do, I'm going to spend the day tomorrow with it I think. My plan is to remove the Cam on 1,2,4 and get the engine timed up again, finger tighten the sprocket and test the timing and make sure the slack is on the tensioner side and there's no slack between the cam sprockets, if it's all well then I will nip up the sprocket bolts and hopefully it will run ok... hopefully Link to post Share on other sites
petemcr 2 Posted January 15, 2014 Author Report Share Posted January 15, 2014 Right, so I've been out and done it again today, I removed the sprocket of cam 1-3-6 and adjusted the crank to dead on TDC, with the intermediate sprocket notch in view, fitted the chain so all the slack is on the tension bolt side and fitted the cam cover and bolt to test the timing, and this is how I left it so far Link to post Share on other sites
petemcr 2 Posted January 15, 2014 Author Report Share Posted January 15, 2014 (edited) Pics and video, is this too tight or is that how it should be, this is after turning the engine over two turns of the crank Sent from my HTC One SV using Tapatalk Edited January 15, 2014 by petemcr Link to post Share on other sites
Lukey. 381 Posted January 16, 2014 Report Share Posted January 16, 2014 Why do you have a single intermediate cog and a double chain? Link to post Share on other sites
petemcr 2 Posted January 16, 2014 Author Report Share Posted January 16, 2014 Why do you have a single intermediate cog and a double chain? That's a damn good question... I know the chains/clutch were done in 2009 before I got the car, I wonder if they got the wrong chain kit at the time and whoever has done the work has just put it on anyways... I don't know what to do now, to swap this out for a single chain I would need to pull the engine/gearbox to either change the intermediate socket to a duplex one, or swap out the sprockets and top chain for a simplex chain right? Link to post Share on other sites
Lukey. 381 Posted January 16, 2014 Report Share Posted January 16, 2014 The double cam sprocket has the dizzy drive on it too, the correct thing as you say would be to put the proper intermediate on. Link to post Share on other sites
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