crank pulley wobble

[benveedub]

hi,

my engine was running lovely the other day whilst moving it onto a flat bed ready for a complete overhaul, it stopped, thought it may of been fuel, but when i went to turn it over again, nothing.

i got my old man to watch the engine turn he said the crankshaft pulley was wobbling?

i have not tried it since, i have turned the engine by hand to see if the timing was right.....it is,


is this bad news?

thanks

ben

 

[gvee]

Grab the pulley firmly with both hands and give it a jiggle*.
Is there any play?

When you tried to restart were you on the flat? I can imagine that if you had a low tank that whilst being loaded the angles could have made the tank appear empty.



*yes, that's the technical term :lol:

 

[benveedub]

cheers for the response,

gave the crank a jiggle.......no movement at all.

 

[gvee]

Nothing at all?

Are you sure your old man saw the pulley wobbling or perhaps it was just a lot of deflection in the fan belt?

 

[benveedub]

when you turn it by hand you notice the pulley wobble, i have seen it whilst trying to turn, it wobbles like mad? got the engine out today its getting stripped

 

[Zcat7]

I had a standard pulley rip itself apart for no apparent reason.

It appeared to fracture around the 2 holes before pulling itself apart. Could it be that yours pulley is also thinking about letting go and is starting to warp, hence wobbling?

 

[69PROJECT]

I just replaced mine with another and it was fine

 

[sparkywig]

I had a standard pulley rip itself apart for no apparent reason.

It appeared to fracture around the 2 holes before pulling itself apart. Could it be that yours pulley is also thinking about letting go and is starting to warp, hence wobbling?

They can do that if they've been damaged during previous removal, usually by using an ill-fitting puller or a screwdriver.

 

[benveedub]

cheers for the replies everyone, will find out for sure today, mechanic has had a new pulley to put on so hopefully this should make a difference. he too has said its funny there is no play in it.
hes going to check everything and set it all up. wish i had the time to do it myself but im way too busy on the bodywork.

cross fingers

 

[aogrady]

cheers for the replies everyone, will find out for sure today, mechanic has had a new pulley to put on so hopefully this should make a difference. he too has said its funny there is no play in it.
hes going to check everything and set it all up. wish i had the time to do it myself but im way too busy on the bodywork.

cross fingers

Hi,

How'd you get on, fixed the wobble?

Cheers,

Alistair

 

[benveedub]

hi, good news the pulley had warpped? put a new ine on and hey presto no wobble.....


anyone heard of this b4?

 

[aogrady]

hi, good news the pulley had warpped? put a new ine on and hey presto no wobble.....


anyone heard of this b4?

That's good then. Not heard personally of a bottom pulley fault, i know the top one can be trouble

Alistair

 

[Zcat7]

Oops, double post...

 

[Zcat7]

The guy I got my replacement pulley from after it pulled apart (see above) said that he had heard of this happening before. I had never removed mine before it broke and hadn't seen it wobbling but like Sparkywig says it only takes a PO to pull it off badly and it can get warped easily enough. Could be that yours had a bit of metal fatigue set in and it was giving up the ghost?

 

[benveedub]

maybe....eitherway hes stripped it down given me a listof parts to buy sounds like he 2ant to do a refurb whilst hes there says it wouldnt do any harm...cost a bloody fortune mind

 

[Trikky2]

The guy I got my replacement pulley from after it pulled apart (see above) said that he had heard of this happening before. I had never removed mine before it broke and hadn't seen it wobbling but like Sparkywig says it only takes a PO to pull it off badly and it can get warped easily enough. Could be that yours had a bit of metal fatigue set in and it was giving up the ghost?

Sparkywig is right. They are very easy to bend when trying to pull them off if they are tight or if the puller is not quite right. I did this myself one time many years ago and had to buy a new one

Refitting a distorted one will result in metal fatigue over time since belt tension will cause slight bending as it rotates and cracks will develop.