Excessive Water Pump VIBRATION (VP 4.3GXi)

[xenonvidita]

The waterpump on my Volvo Penta 4.3GXi has just been replaced (brand new), but it seems to vibrates excessively, as if rotating on a wrong axis. However it is a brand new pump and the engineer who installed it was puzzled too and checked with Volvo Penta who allegedly said this is normal. I am not convinced and have posted a video of the vibration on youtube as I feel my water pump's vibration is far too excessive: If anyone with a view could take a look and give me an opinion I would appreciate it: (YouTube)

Note: I had a similar probmem with the old water pump 3 years ago, after a change of impeller it was rotating so much that it actually came off its support!!! so this time I am being very cautious as despite the engineer's assurances that they all do this, I have seen many other 4.3 engines without this problem.

I have also found a similar thread on this forum (Thread: excessive vibration of volvo penta seawater pump ) where others have said some vibration is normal, but all videos of this engine on youtube show them with a non vibrating water pump...

Any comments will be welcome. Thanks in advance

 

[nathanj988]

Re: Excessive Water Pump VIBRATION (VP 4.3GXi)

Your video is marked private.

 

[dypcdiver]

Re: Excessive Water Pump VIBRATION (VP 4.3GXi)

That is definitely not right. Looks to me as if the bearing has moved or that the mechanic has some how mounted the pump at an angle on the harmonic balancer, or possibly the crank stub is not running concentrically.

 

[mikeneal]

Re: Excessive Water Pump VIBRATION (VP 4.3GXi)

Def not right. Harmonic balancer is running true so either water pump shaft is bent or it is not square to the balancer. I would suspect not mounted flat to balancer. It is a slip fit to a rib feature of the balancer so any corrosion or debris will make it not be flat.