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[JamesV6CDX]

I'm just thinking about where to start, when I look at the Omega on Monday. Likelyhood is, it's suffered a cambelt failure at 3,000rpm.

I am thinking -

A) Strip it down to the timing belt. Look for obvious signs of damage or belt slippage. If none found, and it appears to be in time, then investigate other options.

B) If it does appear to have had a cambelt problem, then I guess all I can attempt to do, is attempt to refit another belt kit, and then compression test it to make sure valves have not been damaged?

C) If the engine truly won't turn by hand and appears seized, I guess I will be removing the heads, to find out what's happened in the chambers.

D) At that point, decide whether to 1) Get a decent pair of 2.5 heads, and rebuild them up. or 2) Service/tweak up my 3.0 lump, and drop that in there! My 3.0 engine is complete, and sounds as sweet as a nut. It needs camcovers, cambelt change and oil cooler, but that won't take long, especially out of the car. I'd to e/m gaskets too.

To be honest, I need to take the quickest option, I am being too inconvenienced by not having wheels!

[shyboy]

PM sent.

[JamesV6CDX]

PM sent.

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[Marks DTM Calib]

Well the first thing to do is get the cambelt cover off......what EXACTLY where you doing when it went?

I thought I read that the aux belt was off?

[shyboy]

Sorry! Posted too soon. PM now sent. I'm getting very old.  

[JamesV6CDX]

Well the first thing to do is get the cambelt cover off......what EXACTLY where you doing when it went?

I thought I read that the aux belt was off?

At the time that (I think) it went - I was pulling up onto the driveway slope in 1st gear.

It was only after this that I popped off the aux belt.. and tried to turn the crank by hand.

Admittedly, I had no room in there, I didn't have a decent ratchet or socket, and it was dark and cold, so I think I need to make a fresh assessment on my day off...?

[Marks DTM Calib]

Yep, need that cam cover off but, thats only a 30 minute job so easy enough to do....

[JamesV6CDX]

Yep, need that cam cover off but, thats only a 30 minute job so easy enough to do....

Yep, I've done enough of them, it won't take m elong to strip it down.

Whatd'ya think I'll find in there  :-/

[Marks DTM Calib]

Difficult to say....you might be lucky.....you might find a collapsed tensioner.

Diffcult one to call.

[JamesV6CDX]

Difficult to say....you might be lucky.....you might find a collapsed tensioner.

Diffcult one to call.

I'll soon see.....

Am I right in thinking anything over two teeth is valve bending time?

[Marks DTM Calib]

Difficult to say....you might be lucky.....you might find a collapsed tensioner.

Diffcult one to call.

I'll soon see.....

Am I right in thinking anything over two teeth is valve bending time?

Yep although, on a 2.5 you can get away with 3 sometimes.

[A380 Elite]

I Wish you luck and i hope, its a small thing and not something big.

Good luck.

All the best.

[sassanach]

or if your really jammy 6, but the engine in my case still ran, but very rattley

[Kevin Wood]

Am I right in thinking anything over two teeth is valve bending time?

Depends in what direction. EL_Swervo had about 4 teeth out, but it was exhaust cam advanced. You can advance exhaust and retard inlet until it won't run and you'll get no contact. Go the other way and you quickly run into bad news though.

Given that the engine won't turn, we can assume there'll be damage if it's cam belt. Do investigate the possibility of something in the clutch area having come apart if the cam belt appears to be OK. You did have "something odd" happening there shortly before...

Kevin

[Entwood]

Can you get it into neutral and actually turn the back wheels by pushing it ??  If the clutch has done something daft .. and you were having gremlins in there....  you may actually be trying to move the whole car when you try and rotate the crank ... which will be damned hard and would appear like a siezed engine.

If you can turn the gearbox I would attack it this way.    

1) cam cover as it a fairly quick job

2) drop the gearbox off and check clutch, a tad longer but if you have screwed the engine you'll probably pull it anyway so nothing really lost and might save much grief

3) if clutch is fine and with no clutch/gearbox you still can't rotate engine, then pull engine to strip or replace