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questions on G35 Bushing replacement
Quick newbie question, what is the rule of thumb for bushing replacement? (especially for an old car that is approaching 200K? )
1) Do you "only" replace the broken one with an upgraded version? or do you do a complete overhaul for every bushing to save the headache down the road.
2) Is DIY possible without the hydraulic press? and if not what does the average shop charge for a complete bushing over haul?
"There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know."
-- Donald Rumsfeld
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Change whats needed, unless customer wants to go all out. some bushings are able to be done without hydraulic press. price depends on vehicleOriginally Posted by KLCC
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Depending on your intentions with the older car you can also buy new suspension arms with the bushings installed. Might be more parts cost but it will definitely save on labour. Pressing out bushings sucks.
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Don't forget to tighten everything down with the bushings in the neutral stress position, or you'll be doing the whole job again in a month.
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+1 for buying control arms w/ pre-installed bushings whenever possible. Makes DIY much easier.
Tap, Rack, BANG!
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By upgraded, do you mean polyurethane bushings? I would stick to the factory bushings unless this is a track car.This quote is hidden because you are ignoring this member. Show Quote
G35's have mostly cast control arms, you are going to need a hydraulic press, a bunch of drivers and receivers, and some knowledge on how to press without damaging things or yourself.
Buying new arms is going to be the easiest way. I'm going to assume the mounting bolts are seized into the bushings and the bolts cannot be removed so the arm will be stuck in the sub frame and has to be cut out with a Sawzall. It is super easy to accidentally cut brake, fuel lines, wiring harness doing this, so be careful.
Usually you replace only what is needed. A few months ago I replaced all rear suspension bushings on a vehicle. It took me 10 hours. So not cheap.
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+1 for new control arms with the bushings pre-installed. And only replace what's broken.
You're going to be in for a fight anyway with the bolts underneath.
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+1 for polyurethane also being a bad call.
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great advice for those who chimed in.
I will only replace what's broken instead, I'll probably looking for an upgrade with the bushing pre-installed to save me the hassle, and time.
Just curious why polyurethane is not advised compare to stock rubber? is it because of environmental? or just because it makes the ride harsh?
"There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know."
-- Donald Rumsfeld
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Way more NVH and possibly squeaky nonsense that's terrible in a daily driven car and doesn't matter at all in a track car.This quote is hidden because you are ignoring this member. Show Quote
I think of it as a track upgrade, only. Similar reason to never run track brake pads on a street car.
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Having some flex and give in bushings is a good thing. It helps isolate vibrations, bumps, and noise. Polyurethane has no give to it, you will feel every crack in the road. It makes the car just harsh. They squeak, you have to lube them every few years. Most regret installing them.This quote is hidden because you are ignoring this member. Show Quote
One of the worst things you can ever do to a vehicle is polyurethane engine mounts.
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