Z1OwnersClub GB

Hey Zedheads,
On installing cams,on early Z1a,#1and 4@TDC and #1 cylinder has camlobes looking at eachother or oppossed?Got the arrow parallel with head on exhaust cam,counted 28 links on camchain b4 installing inlet cam.Crank turns twice to 1 revolution of camshafts.Any clews fellas :
Thanks

Pointing away if they are the same as the J type.
This was earlier today and although a couple of degrees off TDC, they are facing away from each other on number 1 cylinder.
This is with number 1 and number 4 at (very nearly) TDC



AL

Thanks Al,
Where was the arrow pointing on the exhaust cam in this position?
Pete

Arrow on exhaust cam always points to front of engine in line with top machined face of the head and the cam lobes will be facing away from each other when viewed from the right hand side (number 4 cyl) Which is also the side which the timing marks are visible from.

As above by zed1015 with number 1 and number 4 cylinders at TDC the number 1 cylinder lobes are facing away from each other as are the cut-outs (notches) on the timing side end of the cams on number 4 cylinder when viewed from the right hand side of the motor.
At this time the lobes of number 4 cylinder are facing toward each other and the timing arrows of the exhaust camshaft and inlet cam shaft are facing away from each other too, fore and aft respectively.

There is a marked difference between the position of the arrows when exactly parallel to the head and the correct valve timing as set out in the manuals.
Similarly, with the arrows parallel to the head or as near as one tooth or the one next to it will allow,... the lobe centre method of measurement may be as much as one tooth or more out due to wear in different components of the valve train, valve clearances, deck heights and head skimming, gasket thickness's..... etc etc etc.

I found that mine is a tooth and a quarter out on the exhaust cam and a tooth and three quarters out on the inlet cam.
The fractions here are explained by adjustable cam sprockets!! and the discrepancy by a mish-mash of non standard parts barrels, pistons, head, cams and base gasket spacing etc.

In any event both arrows are fractionally above horizontal, the inlet being more so than the exhaust and this is not a set up for radical cam timing it differs from standard by only about three degrees.

Hope this helps.

AL

Edited to correct hideous error on my part

Is it possible to get them the other way round i.e. lobes of no. 1 pointing out with 1 and 4 at TDC ?

Apologies to Peter and others for some reason i have written the wrong thing twice. Half a day of cam dialling has zapped my ability to tell left from right.

They are indeed facing away from each other.
The cam lobe of number 1 cylinder, the arrow on the cam wheel and the cut out notch on the right hand side are all aligned.

Hope i haven't caused any disasters in the mean time.

AL


*I will edit the above to as not to mis-lead others.*

Was just checking as mine are definitely pointing out on no. 1 at TDC.

Evans, yourself and zed1015 were absolutely correct they are facing away. I dont know what happened between walking from the engine to the computer but hopefully i caught it in time.

What a plonker!!!!


AL

Also, it is very easy to be one pin out when counting 28, so turn engine over by hand with a spanner then check again.

Thanks for that guys,I'll have to find another reason why mine wont start...It holed a piston nearly 30 years ago and has'nt run since.....!