Hi Guys,

I have a problem with my go 21 3 port sport engine, when running it makes an intermittant "rattle" sound that is definately coming from the engine not the car. I'm pretty new to nitro and have never taken an engine apart before, I've read up about it but if any of you guys might have an idea what it could be before i start work stripping it down that would be fantastic!

Cheers

Paul