Radiator or what?

[87sheerips]

OK I cant get out of silver lake without breaking my shit some how. OK, i get off the shee like 30 mins after the first ride. Its hot as hell, with coolant boiling in the overflow. I purged the system by blowing into the top of the radiator, until all the fluid was out of the head. It semed to blow through fine. Impleller looks aftermarket and it works (first time dealing with cooling system). Started it without the radiator cap and coolant timmediately starts flowing through the top. Its not boiling, its just flowing. It looks like the coolant is in the bike, but its not going anywhere. I also found a litlle gummy piece sitting in the radiator, looks like the stuff you pour in to fix cracks. Any input on this would me great thanks

[409Banshee]

OK I cant get out of silver lake without breaking my shit some how.  OK, i get off the shee like 30 mins after the first ride.  Its hot as hell, with coolant boiling in the overflow.  I purged the system by blowing into the top of the radiator, until all the fluid was out of the head.  It semed to blow through fine.  Impleller looks aftermarket and it works (first time dealing with cooling system).  Started it without the radiator cap and coolant timmediately starts flowing through the top.  Its not boiling, its just flowing.  It looks like the coolant is in the bike, but its not going anywhere. I also found a litlle gummy piece sitting in the radiator, looks like the stuff you pour in to fix cracks.  Any input on this would me great thanks 

411936[/snapback]

 

I had something of a similar problem running real hot. If your impeller looks like billet, its aftermarket. Stockers are some kind of plastic. I ended up just getting a new Fluidyne radiator, (it was time for a new one anyway) and ran Engine Ice as coolant, and haven't had a heat problem since. I was also a little lean in the jetting as well, got that changed. If you found some gunk in the rad, I'd pull off the coolant hose on the rt side of the bike and start running water through it to flush it out to see what else could be there, just my $0.02.

[Rock-46]

I had some problems overheating, and after going through the whole cooling system, re-jetting a few times we still couldn't find the problem. After all that it ended up being the headgasket had a small leak. Replaced the head gasket, and haven't had a problem since.

 

If your bike it not heavily moded and the stock rad is working properly there is no reason why you need to spend the $$ on a new one. I would guess the problem is somplace other than that.

[87sheerips]

Well you can see my mods in my Signature, i am 100 over which runs hot as it is. My head gasket has been ran for about 2hrs total. I flushed the system for flow and it seemed fine. The radiator is obviously the original but it doesnt leak or anything. There were no signs besides noticing i was overheated one time. I flushed it and refilled the system only to overheat immediately again. If someone can brush me up on the cooling system that would be great, im still not an expert in this area, thanks!

 

Remember coolant immediately started to flow out of the top of the radiator(cap off) as soon as i started to run it.

[Machwon]

How far has your head been milled? Has it been reworked lately for the .100 over cylinders? You could have some detonation going on.

[batoutofshell]

The radiator system runs on pressure if you are loosing it at the cap you need a new cap,same thing happened to me got a new cap and it was cool yes I have a 87 too. that will cause it to seem like its overheating

[87sheerips]

for the first question, my head has been milled .20 to make up for the 100 over. Before my recent rebuild the squish area was too small and i was getting a little piston slap. So that area is good.

 

For the second question, Fluid is coming from the cap when i take it off intentionally. When running , coolant shouldnt want to come out of the cap I thought,. It seems like the system is building huge pressure and throwing it out of the overflow.

[batoutofshell]

I was just saying when mine got hot the coolant came out of the cap and caused it to lose coolant i thought that what you said my bad!you have some kind of backup it sounds like to me??

[87sheerips]

yea, thats what it seems. But i dont know what causes a radiator to go bad besides it cracking and leaking. My impeller works fine too. Seems to be a lot of pressure built up. When i take to top off the overflow, pressure releases at it was steaming. I dont knwo whether to buy a radiator or what.

[87sheerips]

so i think i might of blew the head gasket, im at 100 over, and from what i hear, missing a gear can be hell for a head gasket(which ive done a few times). Anyone agree or am i shootin at the wrong bird here??

[RNBRAD]

Definitely sounds like a head gasket. Also do you notice any excess moisture or steam coming from pipes? Radiator fluid smell like gas or exhaust? Either one or both of those your headgasket is blown.

[87sheerips]

yea, the head gasket steams around it, and fluis is also steaming, looks liek pressure is going into water side. I think the head gasket is the aswer too, now i just have to find one for 100 over cylenders.

 

Thanks RNBRAD