stag engine timing

[georgestag1]

Hi guys. Remember me, georgestag1 of the stuck stu stub in the cyl' block. The stellite drill method was a waste of money and time (still nothing ventured nothing gained) I managed to remove the stub using a rotary cutter. It took a lot of time and effort resulting in a not quite round hole to which I fitted a helicoil. The heads are now fitted

However all isn't plain sailing and I have the following problem. I managed to cast the right hand timing chain which ended up near the sump. (I won't say how) (The left hand chain is still in position) I can refit the RH chain but as the camshafts aren't fitted I fear I've lost the timing.

My Haynes manual isn't a lot of help as it only caters for an engine out of the car. For timing it states "check that the line on the flywheel is aligned with the line marked on the flywheel housing". That's no help to me with the engine in situ.

I think I can retrieve the situation as follows. The section in my haynes manual re fitting the jackshaft states "Position the jackshaft so that the line marked on the sprocket slopes slightly down towards the lefthand bank with the dowel to the lefthand bank and the No2 piston on TDC". The jackshaft and left hand chain haven't been removed. Am I correct in thinking the timing can be retrieved by referring to the marks on the jackshaft sprocket ?

I look forward with bated breath too helpful comments re the above.


My best regards to all my "helpers"

George stag1

[AlanD]

Hi George,
just a thought, have you tried positioning a mirror there to see the timing marks?

Alan

[V Mad]

No George, the jackshaft position cannot help you set the cam timing. Firstly set the crankhsaft for piston No2 at TDC. If you cannot refit the timing cover and pulley, then instead this can be done with a rod through the plug hole, plus a dial gauge helps to accurately find the topmost point. To set correct cam timing you then need to have the camshafts, sprockets and chains fitted set so that the slot marks are all aligned at the top as described in the manuals.

The jackshaft position is only of use to make sure the distributor is set at the original position. Even then you can reset the distributor anyway if you need to.

[Coppo]

Hi George.

You should get hold of one of the They are a must..This is my stag bible....

Cheers.

Paul.

[peterrc]

Hi George, all the information that you require can be found here.

http://www.grampianstags.net/StagManual.pdf

It takes a while to download but the Engine information starts at page 50.
Peter, Cupar

[jbuckl]

Stating the Blindingly obvious (sorry) :-

Basically do this:-

Set piston no.2 to tdc without the cams fitted.

Reassemble chains and sprockets using support brackets, ensuring jackshaft sprocket line is as per r.o.m.(for dizzy adjustment range)

Reassemble cams.

Bolt cam sprockets to cams.

[georgestag1]

Hi jbuckl
Stating the blindingly obvious is OK by me.
I've read your posting and I have the following query. Doing as you suggest I feel the camshafts could be coupled up 180 degs our of sync'. Excuse my ignorance but what is r.o.m (for dizzy adjustment range)? I am sure your explanation will cause me to say "what a thicky I am".

As it is only the cork which has been stolen I hope the contents are all there.

Cheers, George.

[Mike Stevens]

R.O.M = Repair Operations Manual. The original Triumph publication which has been scanned and uploaded.

Cheers,
Mike.

[georgestag1]

stag engine timing

Hi Alan D, Vmad, and Peter cupar.

Thank you all for your advice but I fear I'm still in deep dodo.
Both the haynes manual and the Triumph repair manual refer me to the lines on the flywheel and flywheel housing for timing the engine. For me to see the said lines (as the engine is still in the car) would require removing the gearbox. That is something I have no wish to do. There must be another method to be unearthed.

The suggestion to use a mirror to find the above marks puzzled me somewhat. I've assumed it is to find the flywheel and it's housing marks. I've looked and I can't find a handy cover to remove which would give the desired sight access, or am I missing something?

My thanks to you all. georgestag

[georgestag1]

Hi Mike
Thank for explaining r.o.m to me. I have read it and sadly it doesn't cover the situation I'm in, namely 2 chains which became detached from the sprockets thereby losing the timing.


I'm sure in the fullness of timeI will be guided to the solution of the problem.


Cheers, georgestag.

[Andrew S]

If you have the timing pulley on the firing stroke on No2 and the rotor arm is pointing to the No 2 lead, then turn cams round so that both marks align with each mark on the front cam caps and attach the chains.

[les M]

Hi Mike
Thank for explaining r.o.m to me. I have read it and sadly it doesn't cover the situation I'm in, namely 2 chains which became detached from the sprockets thereby losing the timing.


I'm sure in the fullness of timeI will be guided to the solution of the problem.


Cheers, georgestag.

George
Can you please tell me what is fitted to your engine, from your posting both heads are fitted without cams? Is the front timing case and the crankshft pully still fitted? or have you removed them. If you can let me know then I should be able to give you the info that you require to get it all back.

Les.

[georgestag1]

Hi Les
Thank you for the interest you are showing in my problem.

Both heads are fitted without the cams. I had however fitted the LH cam and turned the engine by hand. that cam has been removed. The front timing case is removed, the crankshaft pulley has been temporarily refitted also the bolt to facilitate engine turning. If by chance the LH cam had been fitted 180 deg out would I have damaged any valves?
The distributer has been removed.

Both chains came off by a stupid act

Regards George.

[georgestag1]

Hi Andrew
Thank you for the timing info. Unfortunately the distributer was removed at the start of my work and hasn't been replaced.

Regards George

[les M]

Hi Les
Thank you for the interest you are showing in my problem.

Both heads are fitted without the cams. I had however fitted the LH cam and turned the engine by hand. that cam has been removed. The front timing case is removed, the crankshaft pulley has been temporarily refitted also the bolt to facilitate engine turning. If by chance the LH cam had been fitted 180 deg out would I have damaged any valves?
The distributer has been removed.

Both chains came off by a stupid act

Regards George.

George
I have attached a word doc with the write up on because I seem to get logged out ater 5 mins on here typing.

Les.