overheating problems

i fitted a pm x-tech 70 kit yesterday to the set up in my sig, it started up on the second kick once it was all back together so i took it for a slow ride to start running it in but after about 15 mins of riding i ould hear the water was bubbling, so i stopped and there was water coming out of the pipe cylinder head, and it was bubbling up for about 5 mins till it cooled down, anyway i took the engine out last night and it had blew the head gasket, so i replaced that and checked everything over and it all looked ok. this morning i took it out for another slow ride and after about 10 mins the same thing happened so ive got the engine out again and ive checked the water pump and the thermastat and they are both working fine.

i havent got a clue what it could be now so anyone of you got an idea?

thanks for reading

 

i would be sniffing around the thermostat, sounds like its stuck closed and so its not circulating the coolant

 

i just stuck it in a cup of boiling water and it opens up fine mate

 

if it was working properly before then its probable something you done while rebuilding the engine are all the hoses back in the correct place then start investigating waterpump thermo etc..

D

 

did you bleed the cooling system properly yes? might have an air lock?

 

I'd say thermostat too, but if ur sure it works then are you putting the right amount of water in? lol try the simple and cheap things first, it can only be things that you have chnaged if it just start doing this after you fitted the kit

 

no ive not bled the cooling system, how would i do that mate?

thanks

 

yeah thermostat is deffinately working and im putting the right amount of water in

 

i never found one of them on my aerox engine but sounds like you have a air lock mate

p.s tell me how you get on with the kit i have the same just havent had chance to ride my bike because its time for mot tax and insurance

 

there isn't one on an aeorx... you could always leave it ticking over with the coolent cap off

 

there is on the pm x-tech kit mate but i couldnt get to it as the bike was built back up, so i had the bike ticking over for about 10 mins with the cap off and i was pumping the pipes for a bit, once i had done that it went out again and once again it stopped, ive stripped the top end off and the thermostat has come apart???? but luckily it has not broke anything else, i tryed the thermostat yesterday and it was working perfectly, but as its broke into pieces i think it must not of been working and the water has got so hot it has blew the gaskets

anyone think the same?? will it do any harm trying it without a thermostat?

thanks

 

nope, can run without a thermostat just means that the engine will take slightly longer to warm up so you will need to let it warm up for a bit longer

 

mite be wise getting a new one before the winter sets in well and truely though!
wouldnt wanna cold sieze it!

 

most aftermarket kits have the bleed nipples

the mhr rep has two lil brass nipples with rubber caps, ive had it before when there was a slight tear which slowly drained all the coolant and was overheating. but it does have to be bled properly!

 

i ran my streetrace without a thermostat.

 

ive just found out my head is slightly warped so gunna phone pm to see if they sell them seperately

 

bruv scrap the pm kit, theyre shit. go anything cast iron, or stick to polini malossi or stage 6 etc. reputable brands.

 

ive just stuck the head from my other 70 kit on and ill see if that works, cant afford another 70 kit atm but if this works it will do for a couple of month til i can afford a better 70 kit

 

could always get the head skimmed, cheap way to do it!