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wuzerk · 27th November 2014, 15:13

I have a new theory about the Hydramount. I have two brand new diesel
Hydramounts and the old original which was passing serious vibration back to
the steering wheel and the seats. When fitting the new mount cured the problem I assumed that the old one had softened with use and was allowing too much
engine movement coupled with the fact that the rubber had many splits in it.
This does no tally with the fact that the two new mounts are easier to bend
back and forth than the old replaced one! In other words the rubber is more supple. I have come to the conclusion that the reason we have to change the Hydramount is because the rubber has stiffened with age which means that it cannot allow the normal amount of engine movement without passing
some of it back through its lower mounting on the chassis to the steering wheel and seats. I was able to compare the engine vibration at tickover on my car with my sons diesel which needs a new mount and they feel identical but my car has no wheel or seat vibration now whereas his is quite bad. In other words the new softer mount is better able to isolate the same amount of vibration from the chassis.

27th November 2014, 15:13	#1
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	The hydramount,a new theory.....discuss I have a new theory about the Hydramount. I have two brand new diesel Hydramounts and the old original which was passing serious vibration back to the steering wheel and the seats. When fitting the new mount cured the problem I assumed that the old one had softened with use and was allowing too much engine movement coupled with the fact that the rubber had many splits in it. This does no tally with the fact that the two new mounts are easier to bend back and forth than the old replaced one! In other words the rubber is more supple. I have come to the conclusion that the reason we have to change the Hydramount is because the rubber has stiffened with age which means that it cannot allow the normal amount of engine movement without passing some of it back through its lower mounting on the chassis to the steering wheel and seats. I was able to compare the engine vibration at tickover on my car with my sons diesel which needs a new mount and they feel identical but my car has no wheel or seat vibration now whereas his is quite bad. In other words the new softer mount is better able to isolate the same amount of vibration from the chassis.