Vehicle & Technical > Discovery

300tdi Tensioner sheered off.

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hrox:
Hey Guys,  driving to work down the motorway this morning and the dash lit up like a xmas tree.  pulled over to find my serpintine belt intact but loose.  closer inspection revealed that the tensioner pully housing bolt had sheered off.  after collecting the pully and housing from up the motorway I managed to get to the office a few miles away but obvisouly heating with electric fan and not alternator was an issue.   Heres my problem.  half the bolt is still stuck in the engine from where it sheered off and I dont know when i will have the funds to get this fixed.   Can i in true landy style, get a shorter belt to put round the crank, water pump and alt and use the alt as a tensioner for now until i can get this fixed properly??  below are pics i took this morning.



Thx in advance

eugene:
try useing a good set of bolt extractors should do it

Disco-andy:
If you are desperate to save money you may be able to fix the old tentioner with a new bolt, after getting the old bits out. A new tenioner will set you back £40 so im not sure id bother fixing it.

ibruceuk:
This happened to me.

I managed to get by for a couple of days with one of these emergency belts just to cover the waterpump and alternator.  Was pretty hard on the arms though without PAS!

It's not the easiest thing to get the old one out, but I managed it with a simple right angled dremel and a good screwdriver.

I used the drill in the dremel to drill a hole about 3mm deep in the centre of the stud, and then one either side of it.  I then used a milling bit and joined the holes together.

Then a decent straight screwdriver and a fair bit of force and turned it out.

A new stud is a couple of quid and bobs your uncle! :)

Mine managed to wipe out my viscous fan when it went bang so that came off too.

Saffy:
Wow what a horrible failure.
My old engine had the thread in the alloy stripped for that stud. Nothing like that sinking feeling when torquing up the nut and it staying slack as stud pulls out. Ended up changing the whole front aux ladder frame as I had a spare one. That engine had stripped threads all over, alternator mount,  rocker shaft pillars, inlet manifold. Heli coiled a few. At the time would have loved to met the ham fisted spanner monkey that trashed the threads :evil:

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