Water in RXP Intercooler

[MammasRXP]

Hello to all of you RXP Wizzards!

Mamma's 2009 RXP was running rough and had a large amount of water in the bilge after having sat in the slip for two weeks. Pulled her out to take her home to take a look at the plugs. Low and behold the #1 cylinder had water in it. Thru the judicial use of this and other forums, it looked like the intercooler could be the culprit. I pulled it and sure enough it had lots of water in it. Problem solved? Well, after having priced a number of intercoolers, I had sticker shock and wanted to double check. I filled the water side and waited for the water to flow out. No joy. Having seen the U tube video of water coming out of the intercooler air hose with the engine running I deducted that it needed warmed up to expand the supposed crack. Well, I got out mamma's hair drier and proceeded to heat the intercooler to pretty dang hot....no water came gushing out. Next thing to do was to pressurize the water side to 35 psi....dayum, no water has come out of the air side at all!

So I am at a loss now as to where the water came from. Any and all advice will be appreciated. Mamma will love you and me!!

Always operated in fresh water
99 hours
Was not winterized

 

[red2blue]

Hello to all of you RXP Wizzards!

Mamma's 2009 RXP was running rough and had a large amount of water in the bilge after having sat in the slip for two weeks. Pulled her out to take her home to take a look at the plugs. Low and behold the #1 cylinder had water in it. Thru the judicial use of this and other forums, it looked like the intercooler could be the culprit. I pulled it and sure enough it had lots of water in it. Problem solved? Well, after having priced a number of intercoolers, I had sticker shock and wanted to double check. I filled the water side and waited for the water to flow out. No joy. Having seen the U tube video of water coming out of the intercooler air hose with the engine running I deducted that it needed warmed up to expand the supposed crack. Well, I got out mamma's hair drier and proceeded to heat the intercooler to pretty dang hot....no water came gushing out. Next thing to do was to pressurize the water side to 35 psi....dayum, no water has come out of the air side at all!

So I am at a loss now as to where the water came from. Any and all advice will be appreciated. Mamma will love you and me!!

Always operated in fresh water
99 hours
Was not winterized

When you say ..."sat in the slip for weeks"....do you mean the hull was in the water for that length of time?

If so...I'd suggest...you had enough water in the bilge...maybe the sc sucked some of that crap and sent it on into the ic an then to the motor.

I'd be pulling all the plugs.Then without plugs in the holes....try firing it up..see if any more water is in there. Checking the oil...looking for milky looking oil. You don't want a hydro-locked motor.

A slight possibility is the resonator filled with water ...maybe some got back fed into the wb and on to the motor...?

 

[MammasRXP]

When you say ..."sat in the slip for weeks"....do you mean the hull was in the water for that length of time?

If so...I'd suggest...you had enough water in the bilge...maybe the sc sucked some of that crap and sent it on into the ic an then to the motor.

I'd be pulling all the plugs.Then without plugs in the holes....try firing it up..see if any more water is in there. Checking the oil...looking for milky looking oil. You don't want a hydro-locked motor.

A slight possibility is the resonator filled with water ...maybe some got back fed into the wb and on to the motor...?

I've pulled the plugs and just #1 had any water. Have cleared it and sprayed LPS2 in the cylinder. Oil looks fine, but am gonna change it anyways. I need to change the wear ring and when it comes in I will put it all back together and take it out to see what develops. I will report the results in a few weeks. Oh, and thanks wizards for the tips on changing out the wear ring!

 

[AircraftDoc]

Was the rear exposed to the waves? Water through jet to inner cooler to exhaust manifold into #1 cylinder through a open exhaust valve.
This is why you can not tow it without pinching the hose from the jet pump.
LPS 3 would be a better choice.

 

[Duane72]

If the intercooler is not leaking my bet is a backfeed like others have described. No other real way for water to get into the cylinders since it is a closed loop system.