I suffered a Run away diesel

Ps watch out as (and I've never understood why!) there are two slots on the flywheel. You need the right one.

One will get you lined up on the injection pump, one will be some way out.

They'll both be out if the timing has shifted but one will still be close (else it wouldn't be running at all) and the other will be way out.

finding tdc is not a problem and ive done a few timing belts in my time. I used to have a reverse light switch for the flywheel but I couldn't find it last time. more worried about having to learn about the air conditioning as I've not worked on a air conditioned 300 before. I expect it is going to get in my way for checking the timing???
car was at normal temp when I test drove as I'd left it to idle for a long time. I got into 3rd gear and no faster than 30mph and clouds of white smoke. none while idling???

Been out there and checked. Whoever suggested timing is spot on... Thank you. Tried with cover on. Put pin in fuel pump on 4 revolutions and every time there was no slot visible on the fly wheel. So. Cover now removed. Pump needed to be turned about 1 tooth clockwise to line up. Belt was way too loose, thought the tensioner had come loose but on further inspection it wasn't. Belt in okay condition except one tooth cracked at the base. I guess that's where it jumped and stretched it, hence why tension was loose. Gates belt and ina tensioner/idler.

Have photos I will post when I get time

Timing belt photos

It’s the thin slot of the two in the flywheel you want, was that the proper timing pin fully in, it looked very wobbly, mine was a neat sliding fit

You are correct, it wouldn't go in, that was what I was trying to show. It is the correct pin. Flywheel was locked in place. I found my reverse light switch. I couldn't get the pin in until I removed the belt and was able to turn the pump pulley. Was a tooth out maybe 2. Had to turn it clockwise to line it up. Bearings were a bit noisy so I've got to order a new timing belt kit.
Interesting that the over revving would cause this??

julianf said:

Timing would be the first thing to re-check.

And air leaks into the fuel if you've been messing with any of the fuel line connections.

If you're 100% sure these are good then start looking at other stuff, but, if you have messed with the fuel lines, my money would be on them.

I've not read the whole lot - have you done the belt post incident?

Click to expand...

Spot on. Looks like you were right. thanks

I reckon you may know this, but the fip, at idle, never sits at the "tdc" position. It almost does, but just not quite - you have to get a socket on it and just apply a touch of tension for the pin to slide in and out without friction.