water in # 4 cyl

[dogfish2008]

hi i have 1988 omc 2.3 .i just rebuilt motor top to bottom .it has its ups and downs .i was changeing sparkplugs with the ears on and the water going to them .when i got to # 4 plug cyl was full of water .what is up with that ? is it because of the ears with water going to them and not running the motor ! got the water out and it runs allright i am all new with this another thing fuel filter on the carb the worng one was in there i got the new one but there is no spring behind the filter .i put it in anyways .will it cause any problums
thanks for any help

 

[Maclin]

Re: water in # 4 cyl

Just having the water running at the muffs would not force water into the engine.

Was the engine running that day just prior to you taking the spark plugs out? The most likely scenario for water in a cylinder is from faulty risers or riser joint gasketing or a faulty exhaust manifolds. The water enters a cylinder via an open exhaust valve.

Did you install new manifolds and risers? If so, did you make sure all mating surfaces were completely flat. Are you sure you used the correct gaskets.

There are two chambers in the exhaust manifold, an exhaust passage and a water passage, same with the riser. Spent cooling water flows up to the exhaust manifold water passages when the engine is running and meets the exhaust flow inside the risers and exits with the exhaust. If a riser or manifold is leaking between the two chambers due to rust or corrosion or just age then the water can enter the exhaust passages when the engine is turned off and will drip or flow into any open exhaust valve. If the riser joint gasketing is leaking then the same thing can happen even if the riser and mnanifold are intact.

 

[dogfish2008]

Re: water in # 4 cyl

hi thanks for the help .when i put it back to gether the riser that is there was no gasget . i will take it back apart and put one in .
thank you

 

[Maclin]

Re: water in # 4 cyl

How old are the exhaust manifold and riser? I might as well be the first to say this....Re-installing old manifolds and risers on a new engine is not a way to save money or time in the long run, or even short run for that matter. If they are old then they can/will leak and can cause hydrolock in the new engine, and that can lead to bent rods, broken pistons....

 

[dogfish2008]

Re: water in # 4 cyl

hi dont know how old manifolds are but the boat is a 1988 so i think they are old .is there any way i can use them ? i took the boat out yesterday and she ran great for a change .i dont know if i said this but we put a new 2.3 motor in her this spring and still getting the bugs out .an other question what do i use to insluate for sound in the motor cover i have nothing there now and it make a lot of noise?
thanks for the help

 

[Maclin]

Re: water in # 4 cyl

Sure you can use them, I mean you just did I think. Older exhaust manifolds and risers can be looked at as a time bomb, once they corrode enough they can leak between the exhaust and water passages and water then has a way to get into the engine via open exhaust valves. I guess it depends on how long you intended the rebuilt engine to not have problems like that!

Yours may go on for a long time with no problems, but some would consider it somewhat of a gamble. I just wanted to make sure you understood the risk.

Good job on the engine work by the way, sounds like you will have some fun with the boat now.

You can search for insulation tips, I have seen that topic before in other categories here.

 

[Dakota47]

Re: water in # 4 cyl

are you in salt water

 

[dogfish2008]

Re: water in # 4 cyl

hi guys
thanks for all the help i will be looking for a new riser and manifold .as for the salt water question i plan to head to the ocean this weekend and look for a tuna thanks again

 

[Maclin]

Re: water in # 4 cyl

Salt water corrodes stuff like that at a very rapid rate. Be sure to always run it at home or wherever with fresh water after every time. I would also look into the salt neutralizing agents and systems that can help keep the leftover chemicals from the salt from doing their worst as it sits.

Good luck on the tuna!

 

[dogfish2008]

Re: water in # 4 cyl

thanks for the info .i think the boat has seen alot of salt water when i got it there was lobster bands in the conpartment.and it is gona see alot more salt water i hope as long as it runs good in the big lake today thank you for the help