ok i just rebuilt my blaster .40 over numara hi performance piston kit and vitos hi comp gasket and d.i.y port job new crank seals oil block off tors removed its mixed 28:1 for the first tank on 93 pump . so any way i started up the blaster and it ran for about 3 mins and is shut off so i tried starting it up again and it just poped so i took off the head to find tranny oil on the piston and head so my ??? is wtf did i do wrong plz help me i cant stand not having my blaster any help appreciated I:I:-/
crank seals and rebuild
- Thread starter blaster518
- Start date
ok but that dosent explain the oil on my piston and head does any one think i need to redo my seals again ??
ok but that dosent explain the oil on my piston and head does any one think i need to redo my seals again
Do a leakdown test. What is your compression? Did you replace the seals because they were bad? If so did you flush out the bottom end of all the tranny fluid that got sucked in before?
ok thanks guys for the fast replies ill try to drain out the oil out of the bottom end an yes i replaced them cus they were bad and i did split the sace the right side and i re placed the seal behind the gear and i reinstalled the bushing/spacer the goes in the middle of the new seal . im gonna take ff the top end again and see what i can do about getting the oil out any suggestions ????
Are you sure you split the cases and not just removed the covers? If you split the cases draining any fluid would not be an issue. As for rinsing it out, since gas/2-stroke oil mix down there I don't see why you could not just use some 32:1. A good time to have done this probably would have been when you had the top end off and possibly pull the motor so you can flip it upside down.
Yeah, if you really split the cases and you put that bushing in the right side seal, then you must have made a mistake sealing the cases. Did you use a case sealant like Yamabond?
I do indeed. Here's a link to a diy http://www.blasterforum.com/do-yourself-20/build-use-leakdown-tester-10663/
Good way to find the actual leak BEFORE tearing down, of course in your case it's 100% likely to be a crankcase to trans leak, but still worth doing. After my rebuilds, I found leaks in both my motors.
ok i took off the clutch cover and replaced it that way can u put that seal in backwards? cus it dosent look any different at all ether side i have it all apart as we speak and i have that seal out no and ima buy a new seal is there any diys how to install them cus i used a socket the size of the out side of the seal
