Tyshooter2000 Posted March 31, 2017 Report Share Posted March 31, 2017 Hello everyone, rebuilt another banshee been a while since I have built one. I bought the best of the best and today finally got her all buttoned up. However once I got her mounted in the frame and everything done I noticed coolant very very small amount like two or three drops dripping from the seams of the head and the cylinders. I re-torqued all the nuts and started her up for the first time. She cranked up no problem but the coolant started to drip more this time. So i let her run for 30 seconds and shut her off. Everything was brand new and it was a aluminum or copper hybrid gasket. I initially torqued to spec and in order and still had this issue. What should I do, any help would be greatly appreciated. By the way it is a stock head and stock cylinders all new oem Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 31, 2017 Report Share Posted March 31, 2017 When you torque everything down, do the head first so the cylinders go to the head evenly, then torque the base. So loosen it all and try it that way. If it still won't seal and you're sure the gasket is good, you may need to have the cylinders and head decked a bit to get it all flattened out. Quote Link to comment Share on other sites More sharing options...
Tyshooter2000 Posted March 31, 2017 Author Report Share Posted March 31, 2017 I tried that and still leaking, now it is leaking past the studs. Brand new studs cylinders head and head gasket I am perplexed. I am going to try some copper spray I guess. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 31, 2017 Report Share Posted March 31, 2017 Pull the head, take a pic of head gasket install, let's make sure head gaskets on rite. I only use oem head gaskets when using stock head, I've seen some pretty shitty n flimsy head gaskets out there. Pull the cylinders n studs then oil cylinder walls down real good. Take ascetone on a red scotchbrite pad and clean all the Black Death off of the mating surfaces. Post pic of clean surfaces. If fucked up find super flat surface (granite block) tape 100 grit paper to granite and work cylinder in a figure 8 pattern making sure you count your circles to repeat on other side . Finish up with 400 grit and use same process on head . Buy a mock up set of gaskets to measure squish . If squish is too tight adjust with thicker base gaskets. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 31, 2017 Report Share Posted March 31, 2017 I've done this countless times with professional results Quote Link to comment Share on other sites More sharing options...
camp0429 Posted March 31, 2017 Report Share Posted March 31, 2017 I like to media blast the cylinder gasket surfaces Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 31, 2017 Report Share Posted March 31, 2017 I like to media blast the cylinder gasket surfaces Sent from my iPhone using Tapatalk That gets them clean, but not flat like lapping. Quote Link to comment Share on other sites More sharing options...
Tyshooter2000 Posted March 31, 2017 Author Report Share Posted March 31, 2017 (edited) Hey guys, well here is the update and some clarification. Sorry my post was so poorly written. I bought an entire oem top end kit. Wiseco pistons gaskets etc. Everything was weseco right out of the box or container except cylinders and head and both them were yamaha factory. I pulled the head today and inspected the gasket. The gasket looked great aside from one slight imperfection right by the water jacket on the right cylinder. However it was the left cylinder that was leaking more. So today I went and got some permatex spray copper gasket and sprayed the head gasket and reinstalled exactly per the manual. Did the second heat cycle on the banshee and nothing leaking from the head. And the machine ran like a beast, idled perfectly and oil and fluids look great. However towards the end of the heat cycle there were a few drops dripping on the exhaust. So it is either coming out of the over flow or from filling the tank. Or worst case scenario it is coming out of the two front cylinder base bolts. So later this evening after everything is cooled down I am going to inspect again. The head issue is solved but now it may be leaking from the bottom cylinder bolts. If that is the case I am going to pull the cylinders and spray down the two gaskets with the copper spray and try again for test number three. As far as cleaning or being true there should be no issue at all as this was a brand new install, everything but the cases, and transmission. Everything else is brand new oem or aftermarket performance. As a add on, when I pulled the head everything looked beautiful. It is obvious coolant was not leaking into the cylinders and it is leaking around the bolts and flange. So hopefully all i have to do is pull the cylinders and permatex and I am good to go if infact it is leaking from there again. Thanks for all the advice as usual. Edited March 31, 2017 by Tyshooter2000 Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted March 31, 2017 Report Share Posted March 31, 2017 Rubber plugs in bottom of cylinders? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 31, 2017 Report Share Posted March 31, 2017 You said everything was OEM, but Weisco. Weisco seals and gaskets are garbage and definitely not OEM. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted April 1, 2017 Report Share Posted April 1, 2017 Yahtzee tricked, only thing I like wiseco are pistons, and I've been have some issues with them over the last six months. Squish test have been all over the place from piston to piston Quote Link to comment Share on other sites More sharing options...
Tyshooter2000 Posted April 1, 2017 Author Report Share Posted April 1, 2017 What I meant to say was everything was either aftermarket performance or OEM. Yes the gasket kit was wiseco and that may certainly be the problem. So after the third heat cycle there is a tiny drip and I mean 2 drips per five minutes. So I contacted the part supplier and he is going to refund me the top end. So now begs the question what the fuck do I get now. I have almost every mod on tranny and supporting mods including racing radiator high flow water pump billet clutch kit blah blah blah, what is the best top end for trail riding? Thanks guys. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted April 1, 2017 Report Share Posted April 1, 2017 Aggressive trail port on your cylinders and you're going in the rite direction Quote Link to comment Share on other sites More sharing options...
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