See here:

http://yoshifab.com/store/index.php?_a=viewProd&productId=11&review=read&added=1

I have been eye-ing these for a good while, and I think I am ready to buy them (my old OEM rubber bushings are torn up).


Any experience with these? Any reservations about using them? I suppose they could transmit more vibration to the chassis than the stock rubber would. But, there are no threads on the topic, so I am seriously considering giving them a try!

-Michael

Looks like a quality made part but probably harsher ride? That would seem the only minus, if it is a minus?

I wonder if any one uses these to hold alternator?
--
I own a Volvo or Does Volvo Own Me? Try the easy to search Expanded Style FAQ Index http://40mph.com/Brickboard_700-900_FAQ_Expanded_Index_Version/

Thanks for the information, mtd240. I just got them for the alternator and a few for the 940. Maybe that will keep the always looser belt from screaming on the 240.

I imagine you could get a wind up toy purr/vibration at worse. Positive thinking out loud, the 940 power steering pump is at the same location as the 240 alternator but with no bushings. Maybe the mechanical PS pump attachment on the 940 causes a vibration on but you cannot notice it.

Tom

The interesting thing about PS pump is that cannot vibrate. In a sense, to vibrate, something has to move back and forth. The more the mass the more the shake.

These are a vane pumps which are similar to a centrifugal pump. The parts that move are in the hub and slip outwardly from centrifugal force. They hug against the outer housing that is elliptical and push the fluid.

No need for the rubber on these would be my thinking but these come from Saginaw Michigan, you know. Who knows what transpired in the translations with just telephones, books and snail mail!

I read from your other post about the marketing idea and it makes very good reasoning that it helped sell their older 4 banger models against the smoothness of our domestic sixes an V-8's of the seventies. They sold even more cars in the eighties.

It must be a universal theory of don't mess with something that is working "unless and only if" it might get us more money in sales to redesign it or cost us unit sales if we do not or affects public preception of the product like a safety recall does!

Phil

Your vibration thoughts are not valid. An imbalance on a unidirectional rotating part will cause vibrations.

Maybe it's not spinning fast enough to matter though?
When it comes to vibrations, I remember the exploding CD worry based on the "exploding" lead disc - it was rotated so fast that the vibrations tore it apart and a large portion of the room that "contained" it.
So yes, I agree - imbalance causes vibration, regardless of it rotating in only one direction.

I can't find what the original experiment was called, but this alludes to the idea: http://blog.cdrom2go.com/2011/02/can-a-cd-rom-disc-explode-in-a-drive/

Personally, I would worry a little about vibrations, but I would worry more about snapping belts that are either over-tightened, or if there is momentarily more resistance to rotation. When replacing things like this with what might be an upgrade, I try to understand why there are bushings there in the first place. My alternator has some rather un-smooth bearings, and I'm sure it would snap a belt without rubber to cushion it. Granted, most accessories are in better condition than mine.


Happy Bricking

I've bought and installed his lower front chassis braces, and if they're any indication of quality, I'd go for these, too, were it not that I already recently installed poly's throughout.

ive seen them in action, there is no vibration from what i could tell caused by these, install does appear to be a major pain
let us know!

I made some of these and put them in one of my cars as only had enough gray PVC bar stock for the experiment. They turn out just fine, no vibration or odd sounds and better alignment.

Plastic is more easy to machine, cost less, still provided some change of density and no corrosion onto the bolts, not that it all matters that much.
Poly tries for a loose to firm or forgiving fit. That aluminum will be there until the cows come home! (:)

I line-bored my brackets to make the inside diameters more round and nominal for simplicity. I noticed as I assembled my setup, that once everything is tensioned up, they are right about "some" looseness probably can be tolerated.

Volvo could have had the alternator bracket solid but I think they must have committed themselves years ago to the rubber setup way of thinking and as poor as it was used on the other side too! I do not know what series cars they started using them but evidently those engineers have secured tenure by now! Now they will learn the Chinese ways, for the good or bad and we shall see!

Besides they can always come back on how bad the rubber setup is and it gets by. I feel they will work fine for you. Post back and give us what will be an expert consumer report!

Phil

Marketing, it is all about the customers first perception, feel of the door closing firm, a quiet vibration free engine and a nice ride indicates quality. Sold! Anything engineering can do per marketing specifications will get done. But valve hushers wear out quickly, accessory bushings wear, then you get piston slap and later there is the rear trailing arm bushings.

Tom