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I seriously doubt it... (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by Bob on January 12, 2001 at 23:33:13:

In Reply to: Re: suspension bushings - urethane or modified OEM posted by Tim in Central Jersey on January 12, 2001 at 08:09:09:

Having installed several sets of Thrust Arm urethane bushings, I and my customers have all been thrilled with the results. None have noticed any adverse effects. In theory slightly more road texture may be transmitted through the suspension, but since most of us are performance oriented, it would be a good trade-off IMHO.

As far as stressing the other bushings, even the stiffer 750il bishings, being much stiffer than stock e28 bushings would do this, right? Actually, the lower control arm bushings are solid (not open matrix like the thrust arm bushings) rubber with a much greater cross section per unit thickness, and are unlikely to deflect much under any circumstances, anyway. I have yet to see a set of these fail for any reason. I keep a couple of sets of lower bushings in stock, but have NEVER had to install a single one because the bushings typically outlast the LCA ball joints!

Actually, wide tires stress the whole suspension way more than harder bushings! Put 195/70-14" 528e tires on your 533/535/633/635 and you'll double your thrust arm bushing life!

I've got nothing against 750il bushings, mind you. It's just that the urethane don't need machining and have served me well.


Brett A., Bob et al:

The guy who does the 'serious' stuff on my E28 said the urethane bushings are too stiff and transmit too much vibration to the chassis. Also, that by replacing 1 set of bushings in the suspension matrix w/ urethane, the difference in "give" will force all the other non-urethane bushings to fail. So, he used the modified 740 or 750il bushings instead.

Just curious to hear what you guys thought of that opinion. Still don't know enough myself to have an opinion yet!


'87 535is
274k miles

I had the 750i bushings insatlled about two months ago and the car brakes and rides smooth.
Don't go with urethane, good but will squeak.

Will be going through my front end soon.
Wanted opinions on urethane versus modified OEM (750il) bushings. Just don't want it squeaking or too much road noise coming back into the car.

Please.... actual experiece with products preferred.

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