Bottom pulley keeps coming loose

Merryck · Dec 30, 2015

I've got a problem where the bottom pulley on my 19J keeps coming loose. It happened a few months ago whilst driving along the motorway and has just happened again twice in two days. Anyone have any idea why this might keep happening?

I'm tempted to tighten it up and just spot weld it in place, but is there likely to be a bigger issue causing this?

jamesmartin · Dec 30, 2015

are the woodruff keys ok and slots if they are loctite should stop bolt coming undone

flat · Dec 30, 2015

Pulley may be worn.

Torque up properly with a proper slathering of loctite on the bolt.

Bolt needs doing up to about 200lbs/ft

freelance · Dec 30, 2015

Pulley is almost certainly worn, check for any movement, and if there is replace it

Merryck · Dec 30, 2015

I'll take a look in the morning and see how it looks. Cheers guys!

Merryck · Dec 30, 2015

Anyone have any idea what part number it is? Just looking to see if there are any local to me, but I have no idea what I'm looking for!

Merryck · Dec 31, 2015

Hi guys, had the pulley off. The crankshaft seems to have no key of any kind on it, and is fairly damaged where it's come loose.

It also appears someone has previously tried my trick of welding it to the shaft! Not really sure what to do to be honest.

jamesmartin · Dec 31, 2015

key only reaches into rear of pulley it will be sheared off, to fully repair youd need another crank and pulley, it might be possible to fashion another key way in front of original one and use a new pulley with plenty of loctite 660

Merryck · Dec 31, 2015

Damn. That is what I was worried you'd say. The pulley spins freely at the moment and doesn't appear to sit squarely on the crank and moves about quite a lot. I think this may be the end for this engine.

jamesmartin · Dec 31, 2015

Merryck said:
Damn. That is what I was worried you'd say. The pulley spins freely at the moment and doesn't appear to sit squarely on the crank and moves about quite a lot. I think this may be the end for this engine.

its not such a hard job to replace crank if the rest of engine is ok,certainly if the rest is ok better than an unknown used lump,

Merryck · Dec 31, 2015

I'm always a bit scared by the internals of engines! I'll have a look and see what I'll be looking at replacing the crank. It may be worthwhile taking the opportunity to replace the engine with something a little more modern to be honest.

nobber · Jan 24, 2016

If you need a crank I have one here.

Dean Whittam · Jan 25, 2016

Merryck said:
I've got a problem where the bottom pulley on my 19J keeps coming loose. It happened a few months ago whilst driving along the motorway and has just happened again twice in two days. Anyone have any idea why this might keep happening?

I'm tempted to tighten it up and just spot weld it in place, but is there likely to be a bigger issue causing this?

Check it's not chipped as it might be out of balance and is the key way worn . I don't advise any weld maybe loctite but not weld .

Dean Whittam · Jan 25, 2016

Try a pulley on it first but fishing the broken key out in situ that engine micro surgery . Sump off might be easier though .

Bottom pulley keeps coming loose

Merryck

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jamesmartin

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flat

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freelance

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Merryck

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Merryck

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Merryck

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jamesmartin

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Merryck

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jamesmartin

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Merryck

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nobber

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Dean Whittam

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Dean Whittam

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