mholub Posted February 11, 2013 Report Posted February 11, 2013 So heres my problem. I have a project banshee and the parts have come from all over. After I got the whole thing put together, I filled the radiator for the first time so that i could start it up, and then noticed that the antifreeze was dripping from my coolhead. My first thought was that I had a bad seal, but after inspecting the gasket it apeared fine. I then went to my jug, to see if anything was wrong with it and it looks like the previous owner droped it on a bolt or somthing circular because where the gasket seals to the jug there is a dent. The engine is a 421 cheetah so i would like to try and save the jug. So my question is, can i mill the top of the jugs to take the dent out? If so how far? I am running 19cc domes with it and thought that maybe I could change them out to compensate for the milling? Please help! Quote
sprinklerman Posted February 11, 2013 Report Posted February 11, 2013 high quality filler? if its deep,weld? Quote
Nieskes Posted February 11, 2013 Report Posted February 11, 2013 Devcon epoxy, then lightly scuff it with some fine sandpaper on a peice of glass or something flat, like possibly the top of your head. Scuff until the high spot from the epoxy is gone. Quote
trickedcarbine Posted February 11, 2013 Report Posted February 11, 2013 Mill it and do domes. Or epoxy and Glass or granite with paper. The later of the two takes a very well qualified set of hands. For all stuff like that I use a glass mirror taken out of the plastic housing for a rear view mirror. Ultimately though if you wanna be sure, tig weld it and get it machined properly. Quote
sheerider11 Posted February 11, 2013 Report Posted February 11, 2013 I got a marble tile and lay it on my bench with a piece of sand paper( 300 I think) and some soapy water. Fill it with epoxy pull the head studs and make figure 8 till its completely flat. Use a straight edge to check. I would assume its small cause you say it's round like a bolt. Quote
mholub Posted February 11, 2013 Author Report Posted February 11, 2013 It is small maybe a 1/8" in diameter. Less than 1/32" deep. I have acces to a machine shop so i could grind or mill the epoxy off to make sure it is perfectly flat. If I touched up the whole surface but barely removed any material would it hurt anything? Obviously I am afraid of removing too much material. Quote
mholub Posted February 11, 2013 Author Report Posted February 11, 2013 What i am asking is if there is any tolerance whatsoever so i could very lightly hit the whole surface. I would do both jugs simultaneously so they were the same. Quote
SOUTHTHIRTY Posted February 11, 2013 Report Posted February 11, 2013 I here when milling the top of the cylinders you run a chance of chipping the nikasil ....that why they always turn cylinders down for the bottom of the cylinders.. Quote
mholub Posted February 11, 2013 Author Report Posted February 11, 2013 I would probably grind as opposed to milling. It wouldnt be nearly as agressive as milling. Quote
Nieskes Posted February 11, 2013 Report Posted February 11, 2013 What i am asking is if there is any tolerance whatsoever so i could very lightly hit the whole surface. I would do both jugs simultaneously so they were the same. well how frickin much are you planning on taking off? Quote
mholub Posted February 11, 2013 Author Report Posted February 11, 2013 A few thousandths of an inch probably. Are the tolerances that tight that i would run the risk of the piston not having enough clearance? Quote
Nieskes Posted February 11, 2013 Report Posted February 11, 2013 Should not be an issue just check it all out when you are done. What is your squish at now? Quote
mholub Posted February 11, 2013 Author Report Posted February 11, 2013 I assume you mean the clearance between the top of piston and head?? I dont know what it is or or how to accurately check it. Sorry i am pretty novice at some of this stuff. Quote
Nieskes Posted February 11, 2013 Report Posted February 11, 2013 So what were you planning in doing after you "milled" the top of the cylinder? Do you have any pics of the gouge? Quote
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