engine damage finally repaired

[checkrail]

I am certain that it's the chain as it travels over the brass tensioner, I have tightened to the recommended

John

[Craven]

Have you got all parts positioned correctly

images.jpg (12.66 KiB) Viewed 850 times

[checkrail]

Yes I've already replaced the swivel bolt, I cannot understand why it was perfectly fine yesterday.

John

[2cams70]

Checkrail - if nothing else your continuing saga certainly has woken people from their slumber and gotten the grey matter juices flowing. A word of warning though. I know your Greyhound enjoys going for walks but don't whatever you do repeat the same thing as happened last time. Hit the go button only when you are sure everything is correct and preferably have someone else give it a quick once over to ensure they are in agreement that everything is correct.

PS - I'd gladly travel to the UK and give it a once over if you are willing to pay the airfare.

[Hawksfield]

John
Sorry 2cams is correct I have to swing it clockwise to get it to fire. Iam getting old.
My ignition is lumenition optronic and can move it slightly back and forth with the engine at rest to set a rough 15 degrees BTDC.
Wish I could give you hands on help.
Good luck and be sure before you fire up.

John

[rgh0]

Did you check the alignment of the tensioner sprocket with the chain ? The carrier can twist and this possibly happened when the chain was broken in the initial incident

regards
Rohan

[checkrail]

Alignment looks ok but i've ordered a new quadrant, i don't know what else to try

John

[types26/36]

I have not read all of the thread so dont know how far the engine was disassembled but did you replace the oil slinger (front of crankshaft?) If you did was it fitted the correct way round?
If you bought a new slinger did you get the correct one as the Lotus type is slightly different to the Ford Cross-flow type having a recess so the chain does not rub on it.

[checkrail]

Yes I replaced the original one

John

[types26/36]

Yes I replaced the original oneJohn

With the correct one?
Here is a picture showing the difference in slingers, the two on the left are Cross-flow types and shows where the chain was catching when used in a T.C.
The one on the right shows a Lotus type and shows the “relief” in the slinger.

[billwill]

I think the timing chain can rattle against the casting surrounding the water pump, but I think this only happens if the chain is too long, i.e has stretched or the chain tensioner is extremely slack.

The tensioner should be tight enough that you can feel the chain tighten at the top between the two cams, and you tighten it untill you can flex the chain up and dwon about three quaterers of an inch with your fingers roughly half way between the two sprocket wheels.

It must have happenned at some stage on mine, because there are two grooves in the waterpump casting, inside the timing case.

~~~~~~~~
See my long topic about conducting a Clay Test for details about putting the Twin Cam head back onto the block.
viewtopic.php?f=39&t=26441&hilit=valve+clearance

[rgh0]

The chain clearance on the Burton cartridge waterpump casting can be tight and some people have reported needed to do some fettling in the area close to the tensioner

cheers
Rohan

[checkrail]

I have a new brass tensioner but it will need some reaming out for the new pin to fit. What sort of clearance should I have? The old one is a easy fit, perhaps that is where the noise is coming from.

Thanks John

[Hawksfield]

Hi
I fitted a new quadrant some years ago it did not require reaming!. It is able to move horizontally on the pin in use.
Did you locktight the sprocket bolt.
Give it a good check when fit the new quadrant, make sure the chain is tensioned correctly before you hand turn it then on the battery plugs out. Cam cover off.

John

[checkrail]

Fitted the new brass carrier after havng to ream out to fit the new pin, the carrier now sits equidistant on the pin with the chain in perfect alignment
As soon as I attempted to rotate the engine the clanking noise is still there, I just cannot fathom why it would turn quietly the other day.

John