1999 DW8 Dispatch - Timing belt hanging off the edge of the fuel pump sprocket

[CitroJim]

I wonder if there's mileage in getting a socket on the crankshaft pulley bolt and slowly turning the engine over by hand and seeing if you can see/hear/feel the cause of the problem.

Good thinking Zel and it would be instructive to look at the crank pulley and make sure the pulley bolt is still tight... They can come loose and often this results in damage to the crank belt sprocket and the crankshaft keyway...

This bolt really does need to be Loctited and done up FT...

I once encountered one that had worked loose and would just not tighten up or stay tight afterwards... Ended up running a bead of weld across the bolt head, washer and pulley to lock it firmly... That worked

[Pug_XUD_KeenAmateur]

The bolt that I was referring to that's a proper Pain in the 4X is the one marked '3' on your diagram.

I strongly suspect that the fourth bolt is in situ correctly, but just in case, its approx location is marked on this not particularly good pic: fixing is not visible but is close to where the arrow points, just behind the pump (bolts to the block).

This one's a doddle to get at and I'd think unlikely to be any issue with that

[NB: spare lump, injection pipework absent]

[CitroJim]

The bolt that I was referring to that's a proper Pain in the 4X is the one marked '3' on your diagram.

Isn't it just

You need to ensure it and the pump flange nuts are done up tight too as there's a lot of vibration in that area of the engine and they will soon come loose if you don't...

A wobbly pump will cause the belt to run offline but they should not have needed to disturb the pump when doing the belt

[kenbw2]

A wobbly pump will cause the belt to run offline but they should not have needed to disturb the pump when doing the belt

The pump has been meddled with a few times. This is the order that I've had meddling done within the past 3 or 4 months:

1. Remove timing belt
2. Remove Lucas pump
3. Attempt to fit incorrect pump (no, mr Peugeot Citroen New and Used Blackburn Limited, a 106 pump won't fit a Dispatch...)
5. Put new belt, tensioner and water pump on
4. Give up and put Lucas back on

(about 1 month passes)

1. Slacken timing belt
2. Remove Lucas pump
3. Try to fit DW8 Bosch pump
4. Tighten it all up
5. Run the engine, fuel pump is faulty
6. Slacken timing belt
7. Remove faulty Bosch pump
8. Fit XUD9 Bosch pump
9. Tighten it all up
10. All works!

(about 2 weeks pass)

1. Notice fuel leak from pump
2. Remove timing belt cover to check for leaks
3. Notice timing belt is dead centre, although moving left-to-right slightly
4. Belt also had those scrape marks
5. Garage removed the top of fuel pump to replace some seals that were leaking. They did this in situ though.
6. Put timing belt cover back on

(about 2 months pass)

1. Remove timing belt cover
2. Holy cr*p, it's like the OP

[CitroJim]

Gosh! That's one heck of a lot of pump disturbances....

After all that work Ken, it's definitely looking at the tightness of the flange and rear bracket bolts then...

[kenbw2]

Gosh! That's one heck of a lot of pump disturbances....

Yea my attempt at getting a Bosch pump went less smoothly than I predicted =/

After all that work Ken, it's definitely looking at the tightness of the flange and rear bracket bolts then...

You're referring to the ones Pug_XUD_KeenAmateur pointed to on his picture, the three just behind the sprocket, or both?

[CitroJim]

You're referring to the ones Pug_XUD_KeenAmateur pointed to on his picture, the three just behind the sprocket, or both?

Both Ken, the three on the flange and the one Keen_Amateur describes as a devil that secures the rear pump bracket to the cradle...

It may now be missing; I've seen them work loose and disappear entirely - trouble is, they're special with taper seats on their heads...

[kenbw2]

Picked it up again, the garage have diagnosed it as the pump being slightly not straight., apparently it was the plate behind the sprocket (not the bracket, apparently. I'm not 100% sure what he's referring to)

£80 has got me a new belt and the pump realigned. Knock £25-£30 off that for the belt, I guess £50-odd isn't worth arguing about as I care about keeping them sweet.

Hopefully that's the last of it.

[CitroJim]

Excellent Ken Pleased it is fixed and a reason has been found...

I'd be very inclined to keep a very careful eye on it for a while...

[kenbw2]

Me too. The photo is so I can compare it to make sure it isn't moving across at all.

I notice it's starting to have those marks on the back of the belt again though. Should I worry about those?

[CitroJim]

I notice it's starting to have those marks on the back of the belt again though. Should I worry about those?

Not necessarily Ken as the belt contacts the side cheeks of he crankshaft sprocket in the normal course of running...

They should only be light witness marks and should not cause damage to the integrity of the belt by taking small lumps out of it, putting small tears into it or causing roughness on the belt surface...

Over time those witness marks become quite polished and smooth..

[kenbw2]

Excellent.

Well it's not like I'm booked to take it to Germany for the weekend this weekend or anything. Oh wait...

Thanks guys for your help with this one. It's made me a feel a bit more equipped, and as ever I learn the most when something goes wrong!

[lydecker777]

Hi, how have you got on with this , I'm struggling with my conversion

[kenbw2]

Have you seen my reply to your comment on the Veg oil forum?

http://www.vegetableoildiesel.co.uk/myb ... #pid515472