POLYGRAPHITE vs. polyurethane
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: POLYGRAPHITE vs. polyurethane (SprintCarDriver)
I believe the polygraphite bushings have graphite impregnated (correct sp/term?) in the bushing to reduce squeaking. The graphite is released when the bushing is rubbed and this lubricates it. Not sure if you have to apply a lubricate to them or not when you install them. Guess I would to be safe.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Re: POLYGRAPHITE vs. polyurethane (Fevre)
I believe the polygraphite bushings have graphite impregnated (correct sp/term?) in the bushing to reduce squeaking. The graphite is released when the bushing is rubbed and this lubricates it. Not sure if you have to apply a lubricate to them or not when you install them. Guess I would to be safe.
Fevre's right. Energy Suspension BLACK POLYURETHANE have graphite in them ... as do all PolyGraphite Brand. ES COLORED POLY Do Not have graphite. Prothane brand Poly Does Not use graphite at all. Apparently, any POLYURETHANE Front Control Arm BUSHING needs lube ... whether graphited or not ... apparently molded-in graphite not too effective as self-lube. It's also rumored that molded-in graphite decreases metal-poly bond strength ... this not an issue with any ES front CA bushing because those POLY bushings aren't bonded anyway. So, I installed ES BLACK poly front CA bushings assembled with ample silicone lube. Also installed COLORED ES poly motor mounts because the metal-to-poly bond strength is supposedly better without graphite. BTW, factory GM front CA bushings are RUBBER (not poly) and they are fully metal-to-rubber bonded and should not be lubed.
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
Re: POLYGRAPHITE vs. polyurethane (jackson)
Are these going to require periodic re-lubrication- thus requiring disassembly?
This is my only objection to using poly bushings.
Brent....
This is my only objection to using poly bushings.
Brent....
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: POLYGRAPHITE vs. polyurethane (MN-Brent)
Are these going to require periodic re-lubrication- thus requiring disassembly?
This is my only objection to using poly bushings.
Brent....
This is my only objection to using poly bushings.
Brent....
Drifting
Joined: Nov 2000
Posts: 1,261
Likes: 0
From: Oak Harbor, Wa
Re: POLYGRAPHITE vs. polyurethane (Chuck Harmon)
You can actually tap the poly bushings with a zirk fitting and grease them with silicon that way.
Chuck
Chuck
