Air leak help

[apple1]

Iam new to the forum and have a question about a air leak i have on my 2001
blaster. the motor will not hold air it goes out as fast as it goes in! i found one leak around the reed cage, but it is not a big enough leak to go that fast.
i also noticed air coming from the crank case vent tube. I have replaced the crank seals and top end. any ideas on where it might be leaking? everything is sealed tester, exhaust..... i have done alot of searching but couldnt really find the answer.
thanks

 

[brandoz28]

why did you need to replace the top end? was the old piston skirt broken?

 

[apple1]

top end was wore out when i bought it. the piston skirt was not broken.

 

[blasterBruce]

If its leaking that bad you want to tear it back down for inspection , doing so very carefully

 

[Blaaster]

Time to thicken up the soapy water in the spray bottle.

Could you have damaged the crank seal when you installed it

 

[apple1]

i dont think i damaged the seals. i was very careful about installing them.the reed cage is the only leak i have found and its a small one.

 

[Blaaster]

If the seal is new, correct and inserted properly and air comes out of the breather, there must be a hole or a crack between the crancase and the gearbox.

 

[apple1]

i will recheck the seals. i hope its not in the cases. i have a 02 thats getting a new crank next week. i dont want to split the cases on both!

 

[Blaaster]

Well I have sad news for you, if the seals hold air, then the case is the culprit.

 

[slickerthanyou]

Only way to get air in tranny is leaking case halves, or leaking clutch side seal and spacer

 

[Blaaster]

Only way to get air in tranny is leaking case halves, or leaking clutch side seal and spacer

Or by placing the tranny vent tube in your mouth and blowing hard.

 

[apple1]

Ill check the clutch seal. Im out on blowin in the vent tube lol.

 

[slickerthanyou]

Or by placing the tranny vent tube in your mouth and blowing hard.

Haaaaaaaaa! Very true!

 

[slickerthanyou]

Ill check the clutch seal. Im out on blowin in the vent tube lol.

I swear I read on here that air can leak past the spacer.

 

[apple1]

well i clamped the vent tube off and it will hold air. i still need to check the clutch seal, but its probably leaking between the cases.

 

[Blaaster]

Ah ha, the old leak between the crancase and the gearbox trick, I hope for your sake it is a crankcase seal problem.