Stranded after timing belt snapped

[dumper]

True mat at work I’d removed loads with a twist back-and-forth but the only one with a slide hammer was my own and it wasn’t just a quick job my hands stung for over a hour after

[V184]

It was originally a na engine with lucas cav pump. Bosch pump was fitted with turbo. I thought in this configuration you kept it pinned? I have checked timing and pins all go in easily. I will try advancing if you think it's worth a shot? But I think there's a problem with cylinder 1 valves. If I crack fuel pipe to 1 then the smoke completely clears. Other cylinders have no effect. So I think low compression on 1.

nice video ive given it a like Provided the timing / valve clearences are spot on i would run a fuel feed directly into the injection pump thus bypassing the tank/housing etc if still no improvement i would get the injection pump tested & if you can get them out the injectors while there out carry out a compression test if it was a bent valve it would miss badly and rattle

[dumper]

Good old DI it’s now earned a GB sticker we use get one at work if you repaired a BrakeDown on the side of the road and didn’t need a recovery truck it this case GB was for got back .
Just a point on the smoke on your YouTube post on my mk3 trying to get a bit more power non turbo Bosch pump I advanced the timing on cold start with the wax stat for cold starting working that also advanced the timing for cold staring it smoked and ratted like yours until up to temperature and the wax stat put the pump back into normal driving mode I had too put the timing back to standard

Haha ill grab a GB sticker for sure.

Im going to mess with the timing and see if it has any effect. Im pretty sure it ran pinned before this so it seems strange. My bosch pump doesn't have any cable system for cold start so I don't think I can manually adjust it.

From reading on hear doing a turbo conversion you have to play with the timing but if you fit a new belt without slacking off the 4 nuts on the pump drive while pined up it can put the timing out a degree or more.

[meerkatmag]

Thanks for the advice! I have checked timing since, slackened pump pulley and made sure all pins go in. This didnt help much. It may just have been advanced from the pin position last time it was done, I didnt fit belt last time so don't know what they did to get it to run nice.

One other thing to note, on checking back the footage I can hear a ticking coming from the exhaust when it first started up. That's now gone away. Maybe piston tapping valve back into place?

Ill keep you posted, waiting for rain to stop before I mess with it.

[Chug]

Good video of all the journey and belt shredding incident and repair, and good you made it back home.

The pistons can't hit the valves if the timing is correct, only when it goes out of time when the belt shreds or snaps, but it may have been slightly bent and running and heat have let it "settle" back in, but a compression test would show any problems, a possibility is a damaged injector tip.

I would still try adjusting the timing a little each way to see if it makes any difference though.

[dumper]

Good video of all the journey and belt shredding incident and repair, and good you made it back home.

The pistons can't hit the valves if the timing is correct, only when it goes out of time when the belt shreds or snaps, but it may have been slightly bent and running and heat have let it "settle" back in, but a compression test would show any problems, a possibility is a damaged injector tip.

I would still try adjusting the timing a little each way to see if it makes any difference though.

As chug said you have nothing to lose just a bit of time to try adjusting the pump timing

[meerkatmag]

Hi all, if you're wondering what happened, ive made a follow up video about getting the van back on the road if anyone's interested:
https://youtu.be/Qnz55kJk7OA?si=ZFqQoD2m5a06Rkfm

[Chug]

Good follow up video, it doesn't need much on the valve or its seat to not seal properly, and I am surprised you can only get 50 mph, both mine with 5.13 and 5.14 axles even fully loaded at 3.5 tonnes can still eventually reach 75mph, maybe the overdrive gearbox is lower geared than the MT75.

[meerkatmag]

Thanks! It's got the power to go quicker but the gearing stops me,. At 3000rpm im going at 50mph. It seems happy cruising all day long at this rpm. Higher than this it used to overheat but maybe now with the head sealing properly I can push it further. What's your revs at 75mph?

[Chug]

I haven't got a rev counter so cannot say but it must be 3000+ I have had 85mph on a downhill with the wind behind me and the wipers flapping on the screen and probably bits of rust flying off lolz, unloaded at about 2.4 tonnes doing 60mph I can feel it pick up if I floor it and soon at 70mph.

[Chug]

Here's a quick crappy video of accelerating from 55 to 70 mph to overtake on the local bypass today, didn't have that much on the back so probably weighing in at about 3 tonnes.
https://www.youtube.com/shorts/61Tkq0BZds8

[meerkatmag]

Love the video! Sounds higher than 3000rpm for sure. A good scream to that engine. You have a petrol speedo did you change engine? I did a bit of maths and think 3750 rpm would get me to 70mph . Sometimes having guages just make you nervous, I guess it probably could cruise at that for a long distance? Maybe ill try it next time im out.

[Chug]

Unless the pump governor has been played with it should be able to go flat out all day without any issue, I did 500 mile round trip to Plymouth and back, mostly motorway/dual carriageway and flat out most of the way, as you say gauges just make you nervous, have you never had it flat out then?
And yes this truck was petrol originally, my mate converted it to diesel just before I bought it off him, and I then put the turbo engine in when that di holed its block with one of its con rods on the M25.