I’m little worried about one thing as from my previous work with car engines I’ve learnt that it’s necessary to re-tighten the head bolts a couple of times after replacing the head gasket etc. I can’t find such maintenance advice regarding the head bolts in the GY6, is that an unnecessary measure in smaller engines like the 150cc GY6?
A blown cylinder head gasket is nothing I want to experience at this stage
My Wangye is now sold..:( --------------------------------- - 1982 Yamaha XZ550 Vision
Post by slowscootin07 on Sept 2, 2007 12:17:31 GMT -5
I too am a mechanic and know like you that auto heads do have to rechecked for torque once after driving a while. I don't know about the gy6, but since I buy rebuild and sell outboard motors for boats I can tell you what you has to be done with them. 1) replace the gasket and torque to specs in the PROPER order. 2) run the engine to normal temp. 3) let the engine cool off 100% and I mean 100%. 4) retorque the bolts. That's it. There's really no tightening service intervals for them(outboards.) I'd be reallll careful though. I've heard the threads on the gy6's arenbt the strongest of ones and wouldn't monkey with them unless you had to.
I hope someone else chimes in here since I'd like to know myself. Jeff
If it smacks you like a bug & tastes like a bug, then it probably was a bug. Don't smile & ride www.jeffs-hotsauces.com/firedrakehome.htm SYM HD200 30mm OKO CVK carb, MRP no-limit CDI, Bando hi-perf coil, Emgo 48mm free-flow, MRP GY6 Type 2 stainless steel exhaust & muffler, Full LED conversion & markers, ENM tach and 100 watt amp/speakers
the factories that make the GY6 engines have been doing it for a long time. They seem to have figured out what the best torque settings are for the engines new. So we don't really need to mess with it unless you had to pull the head off for some reason. So its best to not mess with it on the GY6 engines. But if you retorque the head bolts, loosen the headbolts and then retorque them to spec.
Many years ago quality control on car engines wasn't all that great, so retorquing your engine bolts was popular on new cars. Motorcycles too. Heck they (the new Harley owner) used to tear down new Harley motorcycle engines just to ensure the engine was built correctly. it was amazing to see all the crap HD was putting out at the time. British motorcycles weren't any better either. the Japanese almost put them all out of business way back then with simply having better quality control.
When I first picked up my brand new Norton Commando, it had a Champion spark plug fail six miles from the cycle shop. Then after they put in new NGK plugs I went about ten more miles back towards home and the head gasket blew out on one cylinder. Go figure. But after that it ran great for quite a while, but I had to replace the head once, get a valve job, the kick stand broke twice and was unweldable, the center stand ate through its mounts from the vibration. But that was about it for problems with the bike when I owned it.
2007 Roketa Fiji 150 2007 Roketa MC54-250B 1992 Harley Sportster 1200 ----------------------------------- "Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming -- WOW--What a ride!!!"
wereed: HOw can I start a thread?
Jun 1, 2013 10:55:49 GMT -5
wereed: or respond to a thread I started three years ago...
Jun 1, 2013 10:56:07 GMT -5
marklorenzi: I just bought one of the Fleetwoods. They look like a clone of the Honda XRM's they sell overseas. It is in transit now and I should get it this week. I will try to post my experience here. Call me the guinea pig hahaha.
Jun 2, 2013 20:29:11 GMT -5
flyangler: wereed, this forum is read only the new forum is on the banner above. Dan
Jun 5, 2013 7:35:29 GMT -5
silkyg1973: can someone please tell me how to post
Jun 10, 2013 12:08:46 GMT -5