bubbles in line from head pipe

[tor*p*do]

Got my ski together with my first B pipe
dual cooling, ported 701, line from back of head into bottom of pipe
and the line from the top of the pipe has air bubbles! (using clear water lines)
Normal?
Need to close down my screws because exhaust is getting into water jacket?
thanks!!!!

 

[Crab]

Got my ski together with my first B pipe
dual cooling, ported 701, line from back of head into bottom of pipe
and the line from the top of the pipe has air bubbles! (using clear water lines)
Normal?
Need to close down my screws because exhaust is getting into water jacket?
thanks!!!!

you may have a head gasket leak, pressure test the headpipe by closing all the screws and plugging one end and blow.

 

[QuickMick]

your riding around with the hood off and noticed this? Or you noticed this on the water hose? I would think if its coming from your exhaust the air bubbles would not be clean.

yea do as crab said to check your pipe.

 

[tor*p*do]

running on trailer in water with hood off

 

[QuickMick]

simple fix, get rid of clear waterlines so you cant see the air bubbles.

 

[tor*p*do]

both plugs nice brown, no sign of head gasket leak
running screws at
hi: 1.5 turns
mid: 0.5 turns
lo: 1.0 turn
at recommendation of engine builder
maybe too many screws open letting exhaust into water jacket?

 

[tor*p*do]

OK,so pulled off the inlet and outlet hoses and closed water screws
blowing in gives the slightest psss of air flow, seems to be lower in pipe
bad news??

 

[tor*p*do]

N e 1?

 

[Dustin Mustangs]

I tested a bpipe like this and it held pressure just fine.

 

[tor*p*do]

OK, so I tightened a few fittings and it holds some pressure
but leaks a little - I figure at injection holes
still doesn't explain the bubbles in the water
It is not the head gasket- both lines from the head are clear water
pipe runs cool and seems OK

 

[Dustin Mustangs]

This might be normal. I have wondered to myself before what keeps the exhaust gasses, which at times are higher in pressure than the cooling system, from back flowing through those bleed holes. Maybe the answer is nothing.

 

[tor*p*do]

simple fix, get rid of clear waterlines so you cant see the air bubbles.

I mowed the back yard and thought about this one
I think the hooker and Dustin have the right idea.
As the high pressure wave from the exhaust port opening hits the headpipe
at what, several hundred psi at least?
it would overpower the cooling water reversing the flow
through the water injection port causing bubbles
This same action of exhaust gas going through the injection holes
is validated by the exhaust gook on the screws
and the high pressure gas cutting will enlarge the holes
hence leakage in old pipes :cool2:

 

[QuickMick]

I mowed the back yard and thought about this one
I think the hooker and Dustin have the right idea.
As the high pressure wave from the exhaust port opening hits the headpipe
at what, several hundred psi at least?
it would overpower the cooling water reversing the flow
through the water injection port causing bubbles
This same action of exhaust gas going through the injection holes
is validated by the exhaust gook on the screws
and the high pressure gas cutting will enlarge the holes
hence leakage in old pipes :cool2:

Professor plub did it with the candlestick.

Seriously, go ride your da*n ski.