Red coolant & why?...

MA70-3.0GT · 11-20-2009, 12:32 PM

Yeah, I seem to recall reading that blue Glycol was thought to be responsible for erosion of parts of the cooling system, although I can't see how this would work if I'm honest, as many bi-metallic engines do use "normal" coolant & are fine with it. I know with some 6 cylinder BMW's the head can erode if the earth strap to the block goes bad, apparently because the starter & ignition system then earths through the next shortest route, which is through the cooling system & the head!
Also with my Honda CX500, you can't use coolant that contains silicates as they erode the ceramic water pump seal. If that were the problem with the 7M then the blue Glycol I use would be OK as it's a silicate free formula that I use in said Honda.

Anyhoo, if I can't find anything definitive one way or the other I'll just bite the bullet & do without my weekly Chicken supply!

11-20-2009, 12:32 PM	#3
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	Yeah, I seem to recall reading that blue Glycol was thought to be responsible for erosion of parts of the cooling system, although I can't see how this would work if I'm honest, as many bi-metallic engines do use "normal" coolant & are fine with it. I know with some 6 cylinder BMW's the head can erode if the earth strap to the block goes bad, apparently because the starter & ignition system then earths through the next shortest route, which is through the cooling system & the head! Also with my Honda CX500, you can't use coolant that contains silicates as they erode the ceramic water pump seal. If that were the problem with the 7M then the blue Glycol I use would be OK as it's a silicate free formula that I use in said Honda. Anyhoo, if I can't find anything definitive one way or the other I'll just bite the bullet & do without my weekly Chicken supply! __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!! Last edited by MA70-3.0GT; 11-20-2009 at 12:35 PM. Reason: Chicken chasing...