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Old 09-03-2014   #1
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Help! Can't get cam sprocket bolt out

Hello,
I'm changing the timing belt and water pump on my 1.9 JTD 105 hp Doblo and things were going fairly well until now. I'm trying to get the cam sprocket off in order to do the water pump and the bolt just won't come off.
I don't have the special counter torque tool, instead I am sticking a screwdriver into what looks like a small slot in the valve cover side?? (looks like black plastic anyway). I'm also assuming the bolt isn't a left hand thread bolt (so I'm turning clockwise to get it in, anti-clockwise to get it out).

I've been putting quite a bit of strength into this, and I don't know how hard I should be going at this before something breaks.
Is this a really tough bolt to get out or is mine tighter than normal? Should I invest in the counter torque tool that holds the cam in place? Anyone use this tool before?

Thanks!
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Last edited by newportz; 09-03-2014 at 09:15.
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Old 09-03-2014   #2
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Re: Help! Can't get cam sprocket bolt out

Because of the arrangement of the 8v JTD, you need a locking tool to remove the pulley.

You could try something to secure it, but with the old belt & tensioners in place to help secure it, then gun it off with an air ratchet or the battery equivalent....

Other than that, the safest bet is the locking tool.

I would suggest a new bolt and some thread locking paste (which is the usual reason they are so damn tight to come off
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Old 09-03-2014   #3
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Re: Help! Can't get cam sprocket bolt out

I'll go to the dealer tomorrow and see if I can get one there...and how much it will cost...oh well, it's part of the adventure I guess

I've read that the water pumps were bad on the 16v JTD's...statistically speaking I wonder how safe I would be just replacing the belt for now. She's got 92 000km on her.
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Old 09-03-2014   #4
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Re: Help! Can't get cam sprocket bolt out

I change around 12 timing belt kits a year and never do just the belt, ALWAYS the whole kit AND water pump.

They usually make a racket before they fail, as well as weep or even drip coolant.

But because you have to remove the belt & pulley to get at the water pump, it simply isn't worth the extra work.

I wouldn't recommend not replacing the water pump
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Old 09-03-2014   #5
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Re: Help! Can't get cam sprocket bolt out

Andoo, you're quite right.
I ended up making my own tool by welding up two 3,5 cm long pieces of half inch rebar to a piece of steel that I had from an old barn door hinge (40"x1.5"x0.25"). Poked the two (spacing previously measured) pieces of rebar into the spokes, being careful of the crank sensor, and they held while I put a breaker bar on the bolt. Man, that was on there tight! Just poking a screwdriver between the spokes of the sprocket would never have done the job.

Thanks for the advice guys!
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