#1banshee Posted February 4, 2009 Report Posted February 4, 2009 So my buddy is doing a leak down test on a motor... It lost 1/2 in 4 hours.... Could the cold weather " 25/35 " deg's then going upto 60/70 deg's in the garage be causeing this to go down in psi?? Should we not wurry about the 1/2 of psi drop in 4 hours? If there was a leak it would of been alot less psi when we checked it right? Quote
tony cub Posted February 4, 2009 Report Posted February 4, 2009 if it holds 5psi in 5min your good.your leaving pressure in to long. Quote
#1banshee Posted February 4, 2009 Author Report Posted February 4, 2009 if it holds 5psi in 5min your good.your leaving pressure in to long. ahh gotcha so dont leave it in too long then? Quote
rubberneck Posted February 4, 2009 Report Posted February 4, 2009 I was told 6psi, for 6 min, sooo 5 for 5, 6 for 6, whatever, doesn't matter. If that bitch only dropped 1/2 psi in 4 hours, its tight as a frogs ass. Fire it up and run it. Quote
Onesickcrewcab Posted February 4, 2009 Report Posted February 4, 2009 I've always done 6 PSI for 6 minutes. Never had it leak past 4 PSI in that time. You should be good to go. Quote
RollinRhino Posted February 4, 2009 Report Posted February 4, 2009 That is actually pretty good on cold metal. 1/2 a pound in that long a time means the motor is tight. Quote
#1banshee Posted February 4, 2009 Author Report Posted February 4, 2009 that tight huh? Thanks for chimeing in guys!! Chad see your dumb ass next week fruite cake I was told 6psi, for 6 min, sooo 5 for 5, 6 for 6, whatever, doesn't matter. If that bitch only dropped 1/2 psi in 4 hours, its tight as a frogs ass. Fire it up and run it. Quote
blaster2006 Posted February 4, 2009 Report Posted February 4, 2009 sorry.. but may i ask what are you talking about ? what is leaking? Quote
#1banshee Posted February 4, 2009 Author Report Posted February 4, 2009 sorry.. but may i ask what are you talking about ? what is leaking? Leak down test to make sure everything is sealed up and there is no air leak's within the motor.. Its a good check to see if you have any air leaks after rebuilding etc etc.. Its a simple test and for like 20/25 bucks of parts its well wourth it. Quote
fasstbanshee Posted February 4, 2009 Report Posted February 4, 2009 sorry.. but may i ask what are you talking about ? what is leaking? my bumm hole :yelrotflmao: Quote
#1banshee Posted February 4, 2009 Author Report Posted February 4, 2009 my bumm hole :yelrotflmao: what kinda butt plug do you have? Quote
CBAIER1206 Posted February 5, 2009 Report Posted February 5, 2009 (edited) It's called the king kong bundy!! LOL....guaranteed to stop any leaks, period! :yelrotflmao: Edited February 5, 2009 by CBAIER1206 Quote
wacko2000 Posted February 5, 2009 Report Posted February 5, 2009 Greg not to jack your thread bro, But how do you do a leak down test? I have heard about them, but never say one done before. where can i buy one? Quote
#1banshee Posted February 5, 2009 Author Report Posted February 5, 2009 I will make you one... What you do is pull off your exhaust.. You get caps to cap them off... Now for the intake same idea but in 1 side u put a plug where u can fill the cyl's up with air..and on the 2nd intake you put a gauge... then you fill it up to 6psi for 6 mins... If it holds the psi your engine is tight no air leaks...If it loses air then you have a leak in your engine and could make it run like shit.. Mine was held 6psi for 6 hours lol. Never budged.. We miss understood what we were told.. Quote
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