2014 sx210 dead cylinder

[HighTechRedNeck]

Hello all,
Hoping to find some technical links from you guys who've been there done that on one of these.
My stbd engine took a dump before I even got on the water. Narrowed it down to the most fwd cylinder. Zero compression reading.
Pulled valve cover, timing chain appears intact and tight. I'm guessing one of the 6 valves or springs is bad. Kind of shocked they did 6 valves per cylinder.
Any leads is appreciated. Hesitant to tear into it with no manual.

 

[rucharlie]

Did you ever fix the problem? What was the problem?

 

[HighTechRedNeck]

Yes. What I assumed was a bad valve ended up being 1 stuck valve. Found out the hard way. The valve stems get corroded evidently if you don’t start it up like once a month.
Pulled whole motor to line up the timing chain. Pretty big nitemare but she’s back on the water till the next fiasco

 

[rucharlie]

I have the same problem with my boat. I got one of them free by transmission fluid in the cylinder, spark plug hole. My engines took on water last year. The other engine still has the problem. I did compression test and each engine with the stuck valve that one cylinder has zero compression the engine that got freed now has regular compression back. You said you pulled the engines. What exactly did you do? Did you rebuild the top? Did you rebuild the bottom? You said you did something with the timing is that’s all you did? I’m trying desperately not to pull out the engine. I know it’s a nightmare worst case I’ll just pull out the top head with the valves in it and take them and get rebuilt, but I don’t know anything about the timing.will the chain will just go back on the same spot. (If I rebuild the top) I’m also assuming we have the same engines I have a 2011 AR 210 with the 1100 cc engines. Four-cylinder non-turbo model.

 

[HighTechRedNeck]

Ironically the same symptoms showed up on my other motor too but I knew it was probably the same thing. On that one I was able to pop it back down without pulling the head.
With the first one I assumed it was a worst case scenario so I built a wood gantry and used a winch to pull the whole motor up and out. The issue was there are no timing marks on the crank so you have to find Top Dead Center the old fashioned way, finding the highest point of travel for cylinder number 1. You can be one tooth off and it won’t start. Yes it’s the jet ski motor stuffed in these boats. There are one or two good YouTube videos for jet ski engines that do an in depth rebuild that helped me

 

[rucharlie]

How did you pop the valve back down? Was it on the intake or exhaust manifold valve? Did you have zero compression on just one cylinder and you worked on that cylinder only?

 

[HighTechRedNeck]

Had no compression on that cylinder. Pulled valve cover and took off cam holders. If you tie wrap the timing chain to cam sprockets you won’t lose timing. Didn’t want to remove cams. I was able to get cams up enough to remove the “cap” over the valve with a magnet. It was an intake valve on both. Banged the top of the valve with a punch and it freed back up. It may have damaged valve stem seal if there was enough corrosion but I’ll cross that bridge when/if I have to.
Hope this makes sense.

 

[rucharlie]

Sounds like amazing advice. I took off the valve cover, but I couldn’t see the cams, but I will try that method. Obviously, the cap is magnetic right? Also, did you mark the sprocket with the chain or you just wired tied it and try to do it? Which valve was it? Was it 1,2,3, or 4 closest to the sprocket or the most farthest away? Thank you

 

[rucharlie]

 

[Neutron]

Sounds like amazing advice. I took off the valve cover, but I couldn’t see the cams, but I will try that method. Obviously, the cap is magnetic right? Also, did you mark the sprocket with the chain or you just wired tied it and try to do it? Which valve was it? Was it 1,2,3, or 4 closest to the sprocket or the most farthest away? Thank you

How could you not see the cams with the valve cover off? Never mind, i see what you mean some lobes are under those hold downs.
Just remove the large hold down one at a time, inspect under then reinstall. Check another and so on one at a time. Nothing will move if the others are still bolted down

 

[rucharlie]

So the stuck valve is on cylinder three the picture shows the camshaft cap covering three and four,,, so I loosen the bolt a little bit without pulling them off and then use a magnet to lift up the cam cap? Looks aluminum, but maybe it’s metal. Also, how many threads should I unscrew ? (8 bolts on that cap or do I have to do all 3 caps for the intake? Also, I’m not removing the caps correct just loosening them a little bit.?

 

[rucharlie]

I’m sorry I couldn’t see the valves.

 

[rucharlie]

I only seen maybe a spring, but if I left the cam caps up. I should see the valves, right