2020 gti se 170 problem

[Slking]

So thanks for adding me to the forum. Had an issue this weekend sucked up some rock and banged up impeller and wear ring but not bad. I shut the engine down and got towed back as it wouldn’t started sounded like a rock had stuck in the impeller. I’ve pulled the pump and there was a rock but after taking to off I was going to crank it just to verify everything ok and the Starter would hit but no crank. I pulled the plugs to hand crank it and each cylinder is full of nice clean oil. Any ideas on what I have done. The rocks didn’t seem that bad and I shut off the engine it didn’t stop on its on with the rock?? It’s only got 41 hours on the engine and it has to be related to the rock incident as it was Running fine before.
Thanks for the thoughts? am I screwed… further investigation in the last 10 minutes tells me it was water in the cylinder. Could I have back fired water up in to cylinder? I was ona pretty switch river is it possible it was forced up the exhaust while I was trying to deal with the rocks?

 

[Milehighguy303]

I don’t see any direct correlation to sucking up some rocks and having your cylinders full of water - the impeller and jet pump are only connected to the engine by the exhaust cooling hose off the jet pump.

You say your ski wouldn’t start and got towed back after sucking up rocks. How far and how fast was the ski towed? Towed 20 MPH or faster for a considerable distance? If you have water in your cylinders, it is possible that you towed the ski over 20 MPH and created a Venturi effect and water was pushed from your jet pump, thru the exhaust cooling hose, into your exhaust manifold and water went into each cylinder because the engine was not running with exhaust pressure to push the water out, like should happen normally when riding the ski. Lake water cools the exhaust.

I have a 2021 GTI SE 170 and page 95 of my owner manual it says to not tow faster than 20 MPH or water can go into the exhaust manifold. This is the only logical explanation I can think of for what happened to your ski.

As for what to do now… you need to get the water out. I had this happen to my 2007 GTI SE 155 in February and you may want to read my post on compression test from February and March. I did not follow the all shop manual steps for water ingestion - but most. I did some other things with a shop vac that were recommended to me by a ski shop without removing my intake or exhaust manifolds, and it was effective. But I would move rather quickly, and don’t panic. You don’t want the water to be in there too long because I took some time and it ended up damaging my injectors too, but I had salt water in my engine. But you can save your engine and ski - it was sort of hard to find a shop willing to quickly help me, so I had to do it myself.

 

[pretex]

You said oil in the cylinders, not water correct?

 

[Slking]

Initially thought it was oils but it was water a fuel once I sucked it out

 

[pretex]

Okay. What Milehigh suggested you should do. Once you get the water out of the cylinders and intake, you will need to change the oil and filter as well. You may have to do oil changes multiple times to get the water out entirely out of the crankcase.

 

[Slking]

Okay after the 6 oil change I’ve got 97% new oil coming out no apparent water. I’ve got to wait to water test it until I get the new impeller and wear ring next week so I’m going to put fresh oil in it and fog the cylinders. Anything else I should do?

 

[skiasylum]

You have water possibly trapped in the intake manifold and exhaust system. The muffler can trap a lot of water and needs to be taken off and drained. The intake manifold can also hold water and should be taken off and drained. You need to drain both systems or you will continue to show water in the oil no matter how many oil changes you do.