Leak Down Test Help
#1
Posted 29 March 2018 - 03:04 AM
#2
Posted 29 March 2018 - 04:22 AM
Personally, as the Compression Test seemed healthy, I wouldn't get too hung up on a Leak Down Test as it's a static test and the motor is in a dynamic state when running.
Also, while the compression test may have been OK, it doesn't necessary mean there's not a leakage path via the gasket from the cooling passage to the push rod holes (and that leads to the sump).
Are you loosing coolant?
Is there any oil in the water? (not that this is conclusive)
#3
Posted 29 March 2018 - 06:24 AM
leakdown is just that leakage, your rings are wornout
#4
Posted 29 March 2018 - 07:11 AM
Are you sure your doing the test correctly? TDC firing position with piston static at the top? If all the cylinders read the same low figure I'd be a suspect of the method or gauge personally
#5
Posted 29 March 2018 - 07:59 AM
Have you got the breathers fitted and connected to the carb? I could pour out water when I had those pesky k&n breathers 'filters'
#6
Posted 29 March 2018 - 12:00 PM
Ac
#7
Posted 29 March 2018 - 12:18 PM
I'd whip the head off. You don't say what type of engine it is but working on the assumption it's a carb type then it won't take very long at all. If it's injection obviously it'll take a little longer but still worth it. Besides it'll be a nice Easter project.
#8
Posted 29 March 2018 - 12:22 PM
#9
Posted 29 March 2018 - 12:54 PM
#10
Posted 29 March 2018 - 06:37 PM
I'm losing some coolant for sure.
I'd suggest taking the head off and going from there.
It could the something as simple as the gasket (most likely) or it could have a crack in the head.
#11
Posted 30 March 2018 - 02:05 AM
Edited by fdmays, 30 March 2018 - 02:06 AM.
#12
Posted 30 March 2018 - 07:59 AM
Edited by Sprocket, 30 March 2018 - 07:59 AM.
#13
Posted 30 March 2018 - 03:35 PM
To my way of thinking its the head gasket...
You have water in the oil and its using water.
Sometimes you never find out what the cause is.....generally specifically or in life
A BK450 will be fine for you assuming its a recently bought one.
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