Leak Down Test Leak at Intake Manifolds

[Boyd12]

951 Carb engine leaks at the intake manifolds when doing a leak down test. Surfaces are clean, torque is correct. Is it ok to use sealer? I would rather not, but I have tried two sets of manifolds with the same result.

 

[Boyd12]

I rechecked the surfaces and torqued to 90 inch/lbs. Still leak. Any ideas?

 

[burtshaver2021]

Probably not much help to you but I had a similar leak on a 717 for my Challenger, leaked where the intake manifold mates to the rotary valve cover. I ordered a new o-ring, haven’t gotten it back together yet but I’m hoping the new o-ring fixed it. What do you have there? O-ring? Or a gasket? Either way, if you’ve replaced the gasket or o-ring and it’s still leaking I couldn’t see a small amount of 518 hurting anything. I always use 518 on my cylinder base gaskets and it calls for it on some o-rings.

 

[Boyd12]

Thank you for the response. It does not have a gasket or seal. I was thinking about using sealer, but I hate to do that since it should not need any. The problem is I cannot install this engine in its present condition.

 

[burtshaver2021]

I’m not going to be much help sorry. Last time I worked on something with reeds was 2 years ago. It was a 2003 600 MXZ. I do remember that the reed cage looked similar to yours in here, but I can’t remember how that sealed up but it did, it wasn’t metal on metal on my snowmobile, I thought it was either a gasket or the reed cage itself had a rubber gasket on it? I can’t remember, good luck though,

 

[burtshaver2021]

Intake gasket on 951 no more ?
Maybe this might help, from the little bit I read on this thread, it looks like there is a rubber gasket on the reed cage that is your gasket, how do they look? Maybe new reed cages unless the rubber on them can be purchased separately

 

[burtshaver2021]

COMETIC Seadoo 951 Aftermarket Reed Gasket
I would be tempted to go ahead and try a little bit of 518. Seen this gasket for use with aftermarket reeds, good luck

 

[Boyd12]

COMETIC Seadoo 951 Aftermarket Reed Gasket
I would be tempted to go ahead and try a little bit of 518. Seen this gasket for use with aftermarket reeds, good luck

THANK YOU! I have used Cometic gaskets before and they worked well.

 

[mikidymac]

I would use some 1211 if anything.

 

[Boyd12]

I ordered gaskets from Cometic and will see what happens.

 

[burtshaver2021]

I ordered gaskets from Cometic and will see what happens.

Let us know what happens, I would be interested to see a couple of pictures of the reed cage, more specifically the rubber gasket on it.

 

[Boyd12]

Let us know what happens, I would be interested to see a couple of pictures of the reed cage, more specifically the rubber gasket on it.

Will do. I should know next week.

 

[Boyd12]

Let us know what happens, I would be interested to see a couple of pictures of the reed cage, more specifically the rubber gasket on it.

For some reason Cometic sent these gaskets like it was an organ donation, I got them this morning! Obviously, they are not correct. I cut the opening to match the manifold and installed them. No more leaking. Yay!

 

[burtshaver2021]

For some reason Cometic send these gaskets like it was an organ donation, I got them this morning! Obviously, they are not correct. I cut the opening to match the manifold and installed them. No more leaking. Yay!

I meant to hit the laughing face, that’s to funny. Made me laugh out loud. Glad you got it fixed