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Old 05-02-2019, 05:34 PM   #1
hessam69
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Default Washers placed on engine accesory bushings?

Hi,

I bought a set of 10 genuine volvo engine accessory mounting bushings for a 240.

I have read on this forum previously that one way to make the bushings last longer is to fit washers the same diameter as the bushings under the mounting bolts.

Is this true? And is there enough room for washer or average thickness? Does anyone have any pictures of their setup with washers installed? I'd like to get the most life out of them, they were not cheap to purchase.

Thank you
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Old 05-02-2019, 06:05 PM   #2
PCH
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I always do if there is room to fit them. Do-it-Centers carry fender washers like this: https://www.hillmangroup.com/us/en/F...shers/p/513FD3
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Old 05-02-2019, 10:26 PM   #3
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The genuine ones should last a decade or two if you keep the oil off of them, no washer. With a washer, possibly longer but they may transmit a touch more noise.
There are even solid aluminum bushings available. They transmit way more noise and vibration but ̶n̶e̶v̶e̶r̶ ̶f̶a̶i̶l̶ last way longer than most alternatives...

Last edited by NotSoFresh; 05-03-2019 at 12:05 AM.. Reason: Jack told me to.
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Old 05-03-2019, 12:01 AM   #4
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Quote:
Originally Posted by NotSoFresh View Post
The genuine ones should last a decade or two if you keep the oil off of them, no washer. With a washer, possibly longer but they may transmit a touch more noise.
There are even solid aluminum bushings available. They transmit way more noise and vibration but never fail...
Thatís not at all true. All of the ones I used did... lasted 2x as long as ploy...
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Old 05-03-2019, 12:05 AM   #5
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Quote:
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Thatís not at all true. All of the ones I used did... lasted 2x as long as ploy...
fixed..
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Old 05-03-2019, 12:09 AM   #6
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fixed..
Poly only lasted about 8 months... daily driving
Aluminum about 12-14 months

I’m currently going back to stock and hope I don’t have to mess with them for a long time

:/
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Old 05-03-2019, 12:31 AM   #7
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Quote:
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Poly only lasted about 8 months... daily driving
Aluminum about 12-14 months

Iím currently going back to stock and hope I donít have to mess with them for a long time

:/
Thing is the bushings also protect the component they are mounting. Alternators and pumps dont like the engine vibrations, and last longer with some dampening, provided the dampening isnt marshmellow soft causing belt misalignment... Cant win I guess.
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Old 05-03-2019, 01:13 AM   #8
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Quote:
Originally Posted by Jack View Post
Poly only lasted about 8 months... daily driving
Aluminum about 12-14 months

Iím currently going back to stock and hope I donít have to mess with them for a long time

:/
Over tightened mounting bolts or belts? Iíve never had the IPD poly ones wear out, Iíve always sold the car before they failed. My current bushings are going on 4 years. The URO black rubber ones didnít last a year.
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Old 05-03-2019, 10:01 AM   #9
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I have had the blue poly mounts from ipd on my power steering pump for at least 8 years now with no problems.
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Old 05-03-2019, 10:56 AM   #10
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What's the mode of failure for the aluminum bushings?

And why would vibration be an issue for accessories? It doesn't seem to hurt other engines' accessories. B20 had alternator rigidly attached, no rubber bushing, and whiteblocks also have their accesories rigidly attached.

I don't think washers on OE rubber is going to do anything.
The rubber failure mode is due to torsion along the radial direction. The washer, since not bonded to the surface of the bushing, shouldn't have any effect on radial torsional stiffness, ESPECIALLY because the inner bushing sleeve protrudes 0.5-1mm from the face of the rubber bushing.
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Old 05-03-2019, 11:05 AM   #11
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I have had the blue poly mounts from ipd on my power steering pump for at least 8 years now with no problems.
How many miles ?
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