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[JamesV6CDX]

I've not checked them properly, but I'm guessing my 'bones are getting worn

I have a few questions though if that's ok Please

1) I've heard you can only polybush the front bushes, not the rear. Is that still the case?

2) How do the bushes press in, and why is a press not required for poly bushes, but is for conventional ones? Do they just go in with a drift, after removing old ones, as per guide?

3) How come with Poly bushes, you can torque all the bolts in the air, without having to lower the car onto it's wheels first? Why are they different?

Sorry, but I'm more of an engine man, I'm not hot on suspension

Cheers,
James

[aaronjb]

1. Yes AFAIK, other than home made solutions.
2. They just slide in - no press required, no drift, just.. fingers
3. Because (and this is the answer to 2, too) the whole bush revolved within the wishbone; with the standard bush you're 'twisting' the rubber bush every time the wishbone goes up & down because the outer part is wedged in the wishbone and the inner part bolted to the chassis; with the poly bush the inner part is bolted to the chassis but the outer is lubricated and free to rotate.

[JamesV6CDX]

3. Because (and this is the answer to 2, too) the whole bush revolved within the wishbone; with the standard bush you're 'twisting' the rubber bush every time the wishbone goes up & down because the outer part is wedged in the wishbone and the inner part bolted to the chassis; with the poly bush the inner part is bolted to the chassis but the outer is lubricated and free to rotate.

I'm gobsmacked at that!!! Is that safe? seems really, really odd!!

[aaronjb]

Oh I forgot - the poly bush also comes in two halves, one half slips in from one side, the other half slips in from the other side

And yep, perfectly safe IMHO

[JamesV6CDX]

Oh I forgot - the poly bush also comes in two halves, one half slips in from one side, the other half slips in from the other side

And yep, perfectly safe IMHO

Two halves, one from each side - guessing this prevents horizontal movement? (which is the worry I had)

In which case, they sound ok!!

[aaronjb]

Yeah - they have (from memory) a 'lip' on each half that's wider than the hole the main bush goes through, so they get sandwiched between the chassis mount and the wishbone, IYSWIM, so they can't migrate out

[sticka_v8_init]

1. Yes AFAIK, other than home made solutions.
2. They just slide in - no press required, no drift, just.. fingers
3. Because (and this is the answer to 2, too) the whole bush revolved within the wishbone; with the standard bush you're 'twisting' the rubber bush every time the wishbone goes up & down because the outer part is wedged in the wishbone and the inner part bolted to the chassis; with the poly bush the inner part is bolted to the chassis but the outer is lubricated and free to rotate.

Aaron, are you saying its dead easy to replace the wishbone bushes with polybushes? If it is as you say then i'm interested.

[YZ250]

1. Yes AFAIK, other than home made solutions.
2. They just slide in - no press required, no drift, just.. fingers
3. Because (and this is the answer to 2, too) the whole bush revolved within the wishbone; with the standard bush you're 'twisting' the rubber bush every time the wishbone goes up & down because the outer part is wedged in the wishbone and the inner part bolted to the chassis; with the poly bush the inner part is bolted to the chassis but the outer is lubricated and free to rotate.

Aaron, are you saying its dead easy to replace the wishbone bushes with polybushes? If it is as you say then i'm interested.

I would say more like quite straightforward rather than dead easy. This applies to the front bush only though. The balljoint is riveted on and the rear bush is still a press fit, hence a lot of people going for Lemforder replacements.

[aaronjb]

Yeah - what that man said.. you still have to get the wishbone at least half off the car and then drill & hacksaw the old bush out of the wishbone.

I can't imagine that part of the process is particularly fun or nice when you're laying on your back under the car (I've not done it myself, I believe Mr Gixer has, though)

[feeutfo]

Things to consider first.

Is the rearward bush ok? If so Polly are for you. If not, new wishbones, unless you want to fleck about with a press.

By far the hardest part is removing the old front bush, cutting out is ok, but try to find some sort of powered chop saw or jig saw with long enough blade. DO NOT cut too deep through the two metal bands ,that make up the old bush innards, and damage the wishbone. See Razo's guide.

Fitting the Polly bush and ESP. torquing the bolts is a piece of piss as it can be done wheels in the air as said.

[YZ250]

Things to consider first.

Is the rearward bush ok? If so Polly are for you. If not, new wishbones, unless you want to fleck about with a press.

By far the hardest part is removing the old front bush, cutting out is ok, but try to find some sort of powered chop saw or jig saw with long enough blade. DO NOT cut too deep through the two metal bands ,that make up the old bush innards, and damage the wishbone. See Razo's guide.

Fitting the Polly bush and ESP. torquing the bolts is a piece of piss as it can be done wheels in the air as said.

Definately.    I used short bits of old wooden batten to wedge down the wishbone away from its hanger to enable cutting. You need to do this to get the shoulders of the poly bush in. 
From then on I just used Razzo's guide as mentioned. In the abscence of a reciprocating saw, I had to remove the inner of the bush and then thread a hacksaw blade through the hole and then put the blade back on the saw if that makes sense. Tedious rather than difficult. 

Regards
Alan

[sticka_v8_init]

Things to consider first.

Is the rearward bush ok? If so Polly are for you. If not, new wishbones, unless you want to fleck about with a press.

By far the hardest part is removing the old front bush, cutting out is ok, but try to find some sort of powered chop saw or jig saw with long enough blade. DO NOT cut too deep through the two metal bands ,that make up the old bush innards, and damage the wishbone. See Razo's guide.

Fitting the Polly bush and ESP. torquing the bolts is a piece of piss as it can be done wheels in the air as said.

Ahhh crap...thought it was too good to be true Lemforder replacements it is then. Had a smile for all of 4 minutes there

[feeutfo]

Things to consider first.

Is the rearward bush ok? If so Polly are for you. If not, new wishbones, unless you want to fleck about with a press.

By far the hardest part is removing the old front bush, cutting out is ok, but try to find some sort of powered chop saw or jig saw with long enough blade. DO NOT cut too deep through the two metal bands ,that make up the old bush innards, and damage the wishbone. See Razo's guide.

Fitting the Polly bush and ESP. torquing the bolts is a piece of piss as it can be done wheels in the air as said.

Ahhh crap...thought it was too good to be true Lemforder replacements it is then. Had a smile for all of 4 minutes there

Apart from the cost, some would argue that's better. As removing the bush is far easier on a bench. Although there's still rear bush bolt and ball joint to far with. Depends if you want the use of the lemforder bushes? Then fit polly if they fail?