engine vibration

H

hindsight

Member
Hi all

I am having problems with a vibration from the engine of my series 1 v8.

I have only had the car a couple of months and am slowly going through the faults. Its always had the vibration but i put it down to the engine mounts , which were non existent, and the carbs being well out of balance.

These things however are now sorted and the vibration is still there. I removed the engine fan hoping that it would be out of balance but there was no difference.

The engine runs fine but when you get to about 2500 revs the vibration starts and lessens at higher revs.

It is definitely engine related as it vibrates just when revving the engine.

I am now thinking that it maybe an out of balance torque converter or has the engine got some sort of balancer on the front?

Any ideas ?

Thanks Steve
 
It should have a balance ring on the front pulley, and the torque converter can be out of balance, but you have 4 positions to choose to fit it, so one of the other 3 might cure it, and if not the engine can be run for very short periods with it disconnected to eliminate it as the cause.

That sort of vibration at those approximate rpm seem to be becoming more common for some reason.
 
Hi Harvey

Thanks for the quick reply.

I think I will try the front pully first as I dont really fancy removing the gearbox unless I really have to.

Do you know if the balancer is part of the front pully or separate ?

Thanks
 
The balancer is separate, but you'll probably have to remove the pulley to fit it. Some are on the front of the pulley, some are on the back. There are two different types of crank pulley dependent on crankshaft type, and fitting the wrong one can cause a vibration, but I can't offhand think how you would tell them apart if you had one of each on the bench in front of you.
 
hindsight said:
I think I will try the front pully first as I dont really fancy removing the gearbox unless I really have to.
Click to expand...

You don't need to remove the gearbox to alter the position of the converter.
 
Is the balancer balanced to an individual engine or can you use any one and can the engine be run without one to see if the vibration is still there ?

Also if the vibration goes with the balancer removed then do I have to use one ?

Thanks.
 
hindsight said:
Is the balancer balanced to an individual engine or can you use any one and can the engine be run without one to see if the vibration is still there ?
Click to expand...

They're balanced to a crankshaft/conrod/piston type, not to an individual engine, so providing you have the correct type for your crank type they can be swapped over. You can run it without one if it doesn't vibrate without it, in fact lots of engines in conversions run without them.

hindsight said:
Also if the vibration goes with the balancer removed then do I have to use one ?
Click to expand...

See above.
 
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