Crankshaft pulley needed please

[Tyre Tread]

Does anyone have a spare crankshaft pulley that I can borrow/rent/buy/have to try and eliminate a vibration problem on one of my cars please.

I'm located between Leicester and Northampton (Market Harborough) and happy to come and collect and return or pay for postage.

[Tyre Tread]

Thanks to you both.

I have a wee confession. Although I have a Chim this pulley if for a Rover P5B but its fitted with a later Chim block (an ehgine bulit by Rob at V8 Dev about 7 years ago).

The engine has a vibration between 1700 and 2200 revs. Definitely engine/box as its engine speed related not road speed.

I've tried turning the flex plate on the autobox through 90 deg as I'm told that can produce a similar vibration but that hasn't cured it.

I have been reliably informed that although the front pulleys/dampers look the same and will fit that they should not be interchanged. I have only just discovered this so would like to try another pulley.

HOWEVER, I realised today that the bolt on part that carries the belt is different since P5B uses a single old fashioned fan belt whereas the later Chim one uses the wide belt.

So, Dave, if I could pop over and have a look at the various options (and better still if you can point out the differences) I would be grateful.

Any other thoughts will be appreciated be appreciated but bearing in mind this the vibration is DEFINITELY engine not road speed related and the vibration is worse under load.

[Tyre Tread]

Thanks Steve and Dave.

Not sure where to go with this now.

Maybe Rob at V8Dev is the best person to ask.

[Tyre Tread]

Not entirely.

I have stripped the engine twice and had the components dynamically balanced and rebuilt it. It still vibrated at exactly the same revs.

I ran it a few times and on one start up the vibration was much reduced. Still there but very feint. I have no idea why. I haven't strated it since die to the presuures of life (house move/job change etc)

Keep meaning to take the old banger for a run. Maybe I will try this week.

[Tyre Tread]

davep said:

And so your journey of "Ahh! Engine vibrations, notoriously difficult to find sir. Have you tried ..." begins.

I haven't heard any new suggestions for more than a year.

[Tyre Tread]

Hmm, intersting. Thanks.

You missed a bit from the web address : http://vibrationfree.co.uk/

[Tyre Tread]

TVaRt said:

hmmm i wonder if they can balance a new pulley/harmonic balancer!? Emailed them...

For that sort of work talk to John Eales as his brother does lots of the V8 Balancing work - His bro is based near Lutterworth.

[Tyre Tread]

V8 Junkie said:

Sorry about that, It,s amazing what they can do sorted the imbalance out insitu

No apologies necessary.

Can I ask what thge issue was with yours please?

[Tyre Tread]

ah right so probably no good for me as I have already run the engine without ancilliaries and had all moving parts balance. The pistons are within half a gram of each other as are the con rods.

It should be as smooth as silk as everything that moves had been balanced and its definitely an engine issue not transmission.

[Tyre Tread]

davep said:

If the engine is internally balanced is the harmonic balancer/pulley assembly neutrally balanced? Is the harmonic balancer the rubber type, if so check the integrity of the seals between the outer ring, the rubber and the central core. The outer ring on mine was sliping slightly which showed up during ignition timing adjustments.

Checked, substituted and not the problem but thanks.