DashLaflash
15+ Year Contributor
- 311
- 7
- Jul 4, 2007
-
Millbury,
Massachusetts
Hey guys I have recently stumbled across the lightweight pulleys and all of the controversy they create. There is no doubt that the 4g63 uses a rubber ring in the crank pulley to help stop the twisting of the crank. It appears that this isn't super effective because of its design as opposed to the kind that's on the 420a that attaches directly to the crank snout. It also can come apart as the rubber gets warn out over time or is a lower quality autozone pulley. Most people are too scared to use an aluminum one and end up buying a $300 fluidampr or something like it. Now every thread I read on the subject people say stay away, and that a friend of a friend of a friend had one cause catastophic engine failure. In the same thread however, someone will post first hand experience of running one for seven years without any issues. Now I know you can't believe everything you read on the internet but this is a good site for DSMers and there is a lot of mis-information on this subject. It's very frustrating. Another note is that Unorthodox has been selling their lightweight crank pulleys for 13 years and would most certainly have gone out of business if these were that much of a problem. There is a slight advantage to having a lightweight pulley as it decreases rotational mass and is a solid piece of aluminum so it will never come apart. Also you can find them much much cheaper than $300. I would get the balancing of the crank pulley double checked at a machine shop however.
So I would like people that have purchased a lightweight crank pulley to post their experiences with it in this thread, as well as how many miles they have travelled with one installed. Also post if it has destroyed your engine and you know for a fact it was from the pulley (This will be hard to prove IMO). I would like only hard facts and first hand experiences PLEASE!!!
So I would like people that have purchased a lightweight crank pulley to post their experiences with it in this thread, as well as how many miles they have travelled with one installed. Also post if it has destroyed your engine and you know for a fact it was from the pulley (This will be hard to prove IMO). I would like only hard facts and first hand experiences PLEASE!!!