trialsnutterman Posted March 2, 2009 Report Share Posted March 2, 2009 If you have got a small crack in the radiator, it will certainly cause problems with over heating. The coolant system is pressurised to raise the boiling temperature of the coolant, so if you've got a crack you may find that the coolant is boiling on the cylinder head and around the cylinder walls, once you get air bubbles forming on the surface it will dramatically reduce the heat transfer. Air is quite a good insulator compared with coolant. Take your radiator to a local fab shop they will have a dye penetration detection kit and they will be able to weld the crack up, if they are any good. I'd also check your timing with stobe light just to make sure. Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 2, 2009 Author Report Share Posted March 2, 2009 (edited) If you have got a small crack in the radiator, it will certainly cause problems with over heating.The coolant system is pressurised to raise the boiling temperature of the coolant, so if you've got a crack you may find that the coolant is boiling on the cylinder head and around the cylinder walls, once you get air bubbles forming on the surface it will dramatically reduce the heat transfer. Air is quite a good insulator compared with coolant. Take your radiator to a local fab shop they will have a dye penetration detection kit and they will be able to weld the crack up, if they are any good. I'd also check your timing with stobe light just to make sure. Cheers trialsnutterman,this is what I was thinking of and the bottom line is :I have a leaky radiator so it needs to be sorted whether it's my poor running/overheating fix or not. I will report back but I am struggling to find a local radiator repair business who will low temp weld it,that's why I was looking at those durafix rods. ...I'm a bit wary that my local ally specialist will want to throw a tig? weld at it..too much heat there for a little radiator perhaps? Wayne Edited March 2, 2009 by HAM2 Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 2, 2009 Author Report Share Posted March 2, 2009 (edited) I'm at home now and have the benefit of viewing the radiator with the paint stripped off...and (as with most jobs I start) it's not as straight forward as I thought Q: When is a crack not a crack? A: When it's the boundary layer of some kinda resin sealant that the 'end tray/header' is seated in?? It looks like araldite! So I guess my first plan involving a little home welding is out the window ,glad I never took it to my local (rough-but-powerful) ally workshop. Anyone ever tackled this sort of thing themselves? Edited March 2, 2009 by HAM2 Quote Link to comment Share on other sites More sharing options...
copemech Posted March 3, 2009 Report Share Posted March 3, 2009 Yea, but I still a bit miffed about what you are looking at, as I look at the '07, the top tank is just bare ali. Normally, my inclination would be similar, either something i can patch or not, just get a new one! I have a glass bead blaster to clean things, but if the ali is too thin or corroded, even the epoxy is risky. Although still not convinced this is the major problem, as normally many may not run them hard enough. As up to a certain point, there is little or no pressure build and the fan just sycles to keep things within a cooler range then cycleles back out. In other words, the cooling capacity has not been exceeded of the basic system not relying upon pressure as long as there is sufficient level and flow without the need for pressure that is naturally developed. Some really hard running! Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 3, 2009 Author Report Share Posted March 3, 2009 This is where we're at--------- can you see the resin seal and the stain where it has been leaking? Quote Link to comment Share on other sites More sharing options...
totalshell Posted March 3, 2009 Report Share Posted March 3, 2009 RADWELD!!!!!! DONT DO ANYTHING ELSE 1.99 AND PROBLEM SOLVED.... Quote Link to comment Share on other sites More sharing options...
copemech Posted March 4, 2009 Report Share Posted March 4, 2009 Good pic, although still difficult to tell if it is leaching from the exhisting seal or quite what. Personally, I would be inclined to attempt a repair, first by balsting it clean, then the application or brake cleaner and air to insure surface is clean of antiferrze residue. Another trick is to use a light vacume on the tank to suck cleaner in, thus insuring (hopefully )good adhesion in crack, and a small amount of super glue to aid in viod filling under vacume, prior to coating with the rad weld, JB weld or whatever Adrialite you call it, of choice. These compounds can work well but it is all about "clean and grip" , little ventured, nontheless! Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 4, 2009 Author Report Share Posted March 4, 2009 Thanks for the replies fellas. Totalshell, I'm a bit wary of the radweld remedy,I've seen what it does to a cars innards and I don't think my teensy trials bike cooling system could cope very well with that additive. Copey,you've pretty muched typed what I was thinking (I just needed a long distance confidence boost ) so I'm going down that route ...watch this space!!?? Quote Link to comment Share on other sites More sharing options...
zippy Posted March 4, 2009 Report Share Posted March 4, 2009 HAM2 Posted Today, 05:31 AM...watch this space!!?? Yep could be big announcement: FOR SALE 2005 Sherco 2.9 Recent Engine rebuild!!!! Just don't have enough time for it anymore. Make Offer $$$$ Ham2, I am just giving you a hard time, I hope you get it sorted so it works well and is cheap to do also. Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 4, 2009 Author Report Share Posted March 4, 2009 If you could see it now,scattered across the garage floor, you wouldn't offer $5 for it Quote Link to comment Share on other sites More sharing options...
zippy Posted March 4, 2009 Report Share Posted March 4, 2009 Does it look like this. This was mine winter of 2007/2008 Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 4, 2009 Author Report Share Posted March 4, 2009 Does it look like this. This was mine winter of 2007/2008 Well, if your having a yard sale I'll make you an offer on that radiator. Quote Link to comment Share on other sites More sharing options...
zippy Posted March 4, 2009 Report Share Posted March 4, 2009 HAHAHAHA sorry mate she's all back together now. Good luck with yours. Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 4, 2009 Author Report Share Posted March 4, 2009 The j b weld is setting as we speak. Quote Link to comment Share on other sites More sharing options...
plunker1 Posted March 5, 2009 Report Share Posted March 5, 2009 Hello gentlemen, I pulled up this blog to try to find a remedy for my Quote Link to comment Share on other sites More sharing options...
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