Crankshaft pulley is wobbly?
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Thread: Crankshaft pulley is wobbly?

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    Default Crankshaft pulley is wobbly?

    I had a new timing belt fitted last week in the GTi6 (and all the related seals). Problem is I've just had a look down the side of the engine while the car was idling as I heard a weird noise ... Only to see a wobbling pulley. I believe it's the crankshaft pulley, it's about 150mm dia. And left of the alternator.

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    Why would it do this and is it related to a timing belt fix? Going to have to limp back to the workshop I think.

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    Should also add that the centre bolt seems tight and the pulley doesn't move by hand

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    Fellow Frogger! Roland's Avatar
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    It would have been taken off and refitted for a timing belt change.

    It's the harmonic balancer, and if its wobbly then it needs replacing.

    It also drives the serpentine belt which drives the alternator and Air conditioning.

    Can you provide a picture of the pulley?

    If it's actually wobbly in operation then you shouldn't run the engine.

    Check back with your mechanic and get him to have a look.

    Cheers
    Roland
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    I've no idea with Peugeots, but it sounds fairly serious. I'm thinking it is a harmonic balancer where the rubber sandwich between the inner and outer pulley is deteriorating?
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    Hmm, yep my first thought was harmonic balancer... Just not sure exactly. Dark now so can't get a pic. It's a bugger as the mechanic I like is 20 klm away. I was going drop it off tomorrow but maybe I shouldn't drive it based on the replies!

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    Fellow Frogger! Roland's Avatar
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    Quote Originally Posted by lowpugV2 View Post
    . . . I shouldn't drive it based on the replies. . .
    I concur!
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    Quote Originally Posted by Roland View Post
    I concur!

    Fairly definitive then. I'll call mechanic in question. I'm feeling like it should be fixed by him, just correctly this time. He's actually really good so I'm sure it won't be an issue.

    I just ran the car for a few seconds to take a video - certainly it looks like the pulley is not centred on it's spindle. So a vertical wobble.

    Here's a pic of the the pulley(big silver one):
    Crankshaft pulley is wobbly?-img_20171015_191737.jpgClick image for larger version. 

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    And brace yourselves - a riveting film. Better than Sunday TV at least.

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    1000+ Posts PeterT's Avatar
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    Looks like a dodgy aftermarket pulley. Definitely not original, which are two piece. That looks like it's solid.
    Roland likes this.

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    Thanks Peter, so I should be asking about that? From memory the that pulley had holes in it last week!

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    1000+ Posts Beano's Avatar
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    I don't know about these cars in particular.

    However I wonder if it has a woodruff key which has not been put back in properly ?

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    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by lowpugV2 View Post
    Thanks Peter, so I should be asking about that? From memory the that pulley had holes in it last week!
    Definitely. That's a very dodgy thing to do. Especially without asking you. Some engines have solid pulleys, such as 8V 405's and 205's. However, they're designed for that configuration. The crank could break in two, from unwanted harmonics, in your case.

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    Quote Originally Posted by PeterT View Post
    Definitely. That's a very dodgy thing to do. Especially without asking you. Some engines have solid pulleys, such as 8V 405's and 205's. However, they're designed for that configuration. The crank could break in two, from unwanted harmonics, in your case.
    Really? Right, so definitely do not drive to workshop then. I assume even a short drive could damage things. Will call them in the morning. Thanks for the input. Should have been a simple oil leak fix...

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    Fellow Frogger! Roland's Avatar
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    Yep, That's a solid pulley.

    It looks like its not seated properly.

    Give the mechanic a call and don't drive the car!

    Cheers
    Roland
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    Quote Originally Posted by Roland View Post
    Yep, That's a solid pulley.

    It looks like its not seated properly.

    Give the mechanic a call and don't drive the car!

    Cheers
    Roland
    Thanks Roland. Car keys locked away... Will catch the train tomorrow. Such a pain though. Oil leak and timing belt was the last thing to fix before I can drive it worry free and do some track days. Wonder if my mechanic will feel bad enough to drive over and fix it in my driveway.

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    Might resume my hunt for a good 505...

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    Spoke to mechanic. He didn't replace the balancer, just degreased and reassemble. Said it's not an oem one but a specific lightened solid version. Probably done by previous owners etc. Reckons the balancer itself is fine but he did say he probably rushed the installation, many apologies etc. He'll sort it out tomorrow for me. Hope it is an easy fix.

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    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by lowpugV2 View Post
    but he did say he probably rushed the installation, many apologies etc.
    A mild understatement, but good to hear responsibility taken.
    Seems to be a rare thing these days.

    Jo

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    Fellow Frogger! Roland's Avatar
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    Quote Originally Posted by lowpugV2 View Post
    Spoke to mechanic. He didn't replace the balancer, just degreased and reassemble. Said it's not an oem one but a specific lightened solid version. Probably done by previous owners etc. Reckons the balancer itself is fine but he did say he probably rushed the installation, many apologies etc. He'll sort it out tomorrow for me. Hope it is an easy fix.
    I'd be very tempted to source a new OEM design one (probably is a harmonic balancer) and have that fitted.

    Peace of mind is the aim here.

    Post or PM the last 8 numbers of the VIN and I or someone can check the part number of the original pulley fitted.

    Cheers
    Roland

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    Quote Originally Posted by jo proffi View Post
    A mild understatement, but good to hear responsibility taken.
    Seems to be a rare thing these days.

    Jo
    He's been flat out lately so I can understand that he might be struggling a bit. He's lending me his car while he rectifies the issue.

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    Quote Originally Posted by Roland View Post
    I'd be very tempted to source a new OEM design one (probably is a harmonic balancer) and have that fitted.

    Peace of mind is the aim here.

    Post or PM the last 8 numbers of the VIN and I or someone can check the part number of the original pulley fitted.

    Cheers
    Roland

    Will do Roland. I had a quick look and it looks like Gates do an oem replacement part. I'll post the VIN later. Much appreciated.

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    Quote Originally Posted by lowpugV2 View Post
    Will do Roland. I had a quick look and it looks like Gates do an oem replacement part. I'll post the VIN later. Much appreciated.
    here's a solid one from the UK which I've fitted to my 306 because of deterioration of the original - they've done lots of kms on these in the uk under all sorts of conditions and never had an issue from the advices I was given

    =>>> Lynx Garage ::: Lynx Power Engineering ::: Engineering

    your call but there's so much compliance in the belt I can't see a shock problem re sh**ting a crankshaft

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    1000+ Posts PeterT's Avatar
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    Each to their own opinion but I wouldn't put an out of balance object on the end of the crankshaft. I've got one on my race car but it was balanced along with all the other rotating bits, before assembly.

    '92 205 Mi16
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    Quote Originally Posted by alittlewino View Post
    here's a solid one from the UK which I've fitted to my 306 because of deterioration of the original - they've done lots of kms on these in the uk under all sorts of conditions and never had an issue from the advices I was given

    =>>> Lynx Garage ::: Lynx Power Engineering ::: Engineering

    your call but there's so much compliance in the belt I can't see a shock problem re sh**ting a crankshaft
    I'd say thats exactly what's on the car now.

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    Quote Originally Posted by PeterT View Post
    Each to their own opinion but I wouldn't put an out of balance object on the end of the crankshaft. I've got one on my race car but it was balanced along with all the other rotating bits, before assembly.

    So slight confession ( put your fingers in your ears Roland) - I drove the car to the workshop.

    Long story short, sent a video to the mech. He asked me to check a few things and then gave an OK to run it over. I figured another 12 klm gentle drive is low risk considering I'd driven the car unawares all weekend.

    He stripped the part of, reset it and it's smooth now. Not a hint of movement. He said if it was his car he'd keep the solid one on there. He also fixed another little oil leak that sprung from the vacuum pump O-ring - did it FOC so I think he was a bit embarrassed about the rushed repair last week. Overall I'd say good service from an honest mechanic who made a rare error.

    Thanks for everyones input. Much appreciated. And before I do any track work I'll order a new and balanced Harmonic Balancer/Pulley and get it fitted.

    At 310,000 klm there's some life left in this GTi6 for sure!
    jo proffi and Roland like this.

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