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Technical JTD timing belt

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Technical JTD timing belt

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Yeti

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OK. I'm confused.

I'm on my second JTD Multipla just now (still got both), and the timing belt instructions are confusing me.

I just changed the engine, and I had to take the head off because one of the glow plugs broke. Put a new belt on too.

So, it fires up - and it sounds really 'knocky', like the belt's a tooth out or something. So I've doublt checked it tonight, but the autodata instructions are really confusing.

It doesn't actually say where the crankshaft timing mark is supposed to line up with - and it doesn't say about the camshaft one either!

The camshaft one says something about 7 teeth after the mark, and 3 teeth before the join in the rear timing belt covers?

Can anyone clear this mess up so I can be sure the belt is on properly?

I can, of course, just take the covers off the other one and copy that, but I'd rather not if I can help it - and if someone does have the answer, it'd be quicker typing this message than looking at the other one!

Thanks.
 
The cam one is pretty obvious.. So you can see that.
The crank pulley has a small Mark on it and it lines up with a Mark on the engine casing at the 9 o'clock position.
Mine is a 115 and that's how it is.
Marty.
 
Hi. If you have bought a new belt there will be two white lines on it. One line needs to line up with the notch on the cam pulley and the other white line needs to line up with the notch on the crank pulley. The pump pulley doesn't have to line up.
Hope this helps,
Mick
 
So the Autodata one is talking ******** then!

I've lined the lines on the belt up with the notches on the pulleys - and it still clatters like a box of spanners. :cry:
 
Not sure what the autodata thing is...
Anyhow...could you see the crank pulley Mark at the nine o'clock position??(some people can't seem to find this..so maybe it's not on all versions)

If your belt lines line up still after fitting it's all good... Worth rotating it by the crank a few turns to confirm tho.
Cheers
Marty.
 
The installation instructions on autodata do describe crankshaft position but only as far as to advise using the timing tool.


I agree the removal instructions on autodata are confusing..

Quote ' Ensure camshaft sprocket timing marks aligned
To engine No..416449: Camshaft sprocket timing mark seven teeth behind cylinder head cover timing mark. Three teeth in front of cylinder head cover lower edge.
From engine No..416450: Ensure timing marks aligned.'

Mine must be after engine No.. 416450 as it has a nice pointer on the Camshaft sprocket , easy to line up.

What year is your JTD??
 
I've checked and double checked the belt. I've compared it to my X reg 105 JTD. All fine.

It runs fine, it just rattles like hell - and the engine I've put in was running when I picked it up.

This one's an 04 plate 110 JTD.

I can see the mark on the crank pulley, but there's no mark on the engine to line it up against - so I've used the lines on the new belt (3 times now).

I've also had all the tappets out and cleaned them all - still rattles like mad.

I really don't know what to try next.
 
Did you originally put the belt on in the wrong position? If so then it may have bent a valve or two and you won't stop it rattling!!
 
are you definately sure the old belt was lined up correctly before?

the camshaft mark is at 1 o'clock is
crankshaft is just past 9'oclock.

however if the old belt had jumped some teeth you wont know where you are...

as when you line the belt up it takes a fair few revolutions for the timing marks to line up again....i nearly **** myself the first time i rechecked! i thought it would line up every revolution...until i actually thought about it!
 
Hi all, i'm new to this, but seeking your advice advice. I have just fitted a gaites timing belt set to our recently purchased 02 jtd 110. It was driving well but on 150k and not much history so changed the lot and the water pump. As a lot of people seem to find, couldn't find a mark to line up with crank pulley, so i got cam marks lined up, marked everything with tipp ex and then scribed a line from centre of crank out through crank pulley mark and filed a little nitch in engine case.
Put new belt on, made sure nothing had moved, all ok, only the line on the belt is one tooth out on the cam pulley, rechecked with my marks on old belt, everything is exactly as it was before i took it apart, so i put it back together, as it came apart as it was running properly. Just wondering if anyone else has had this? Its nagging at me as obviously the marks on the belt are there for a reason. Haven't started it yet as i'm doing thermostat which is more time consuming than you would think!
Thankyou for any advice:D
 
The belt is on correctly, and always has been.

It runs and drives fine - it just knocks like hell.

I've rechecked the belt 3 times, and I've had the tappets out to clean them all out, and it's still doing it.

It can wait for now - I'll fix my Pajero instead for now!
 
Yeti said:
So the Autodata one is talking ******** then!

I've lined the lines on the belt up with the notches on the pulleys - and it still clatters like a box of spanners. :cry:
Click to expand...

When you did the above did you need to move any of the pulleys before the lines lined up? It does sound very much like you've slightly bent a valve. This would cause a rattle if it's sticking slightly due to being bent!!
If you turn the engine 720 degrees by hand can you hear any funny clunking noises?
Mick
 
No clunking noises when turning it over by hand. Or even when turning it over with the starter motor.

It's very much like diesel knock.

I did have a thought - one of the glow plugs broke, so I had the head off and fitted a new head gasket - I did order a standard thickness one, but if it was slightly too thin, could it cause this?
 
Hi all, just to update you on my situation, i timed it up with the marks on the belt even though they were one tooth further apart on the taught side of the belt than the one that came off and it starts, runs and drives perfectly. Great forum, thanks to all:D
 
Like Poppoprog Ive found that my cambelt on jdtm is one tooth out on the cam pully, its one tooth closer to the crankshaft than the marks indicate it should be. not sure what to do. it runs and drives what I consider quite well,

however it may run better if i moved it one tooth tighter.. Mpg isnt great but if im not opening the inlet/ exhaust valves at the right time that would make sense. If it was one tooth out would there be damage caused or would it run?

Poppoprog and anyone else, did you notice improvement in power/mpg when putting the marks lining up? need to know asap as its in bits on the drive...
 
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