omc 3.0 water in oil

[Harleyguy]

I have a omc 3.0 1994 in a four winns. I had the head and exhust gaskets replaced we also decided to replace all the gaskets on the top end when we discovered permatex on all the gaskets, now everything is cleaned up and re assembled. no start, when we hold throttle open it will catch fire in the carb? I am leaning towards the valves needing adjustments. also the plugs are new with but the wires seem a tad loose but they all make the snap when they were pushed on. the boat ran before the tear down. It was mixing h20 in the oil. please help me thanks...

 

[Windykid]

Re: help

Re: help

I Think Your Timing Is Out.

 

[Don S]

Re: help

Re: help

Almost everyone that comes to this forum wants "HELP". If you would put in the title something like "OMC 3.0, water in oil" you would get a better response.

Did you replace all those gaskets or just "Clean them up" and re-use them. Did you also cleanup the head gasket? or replace it?

 

[Harleyguy]

Re: help

Re: help

thanks for the info I am new to this site yes all the gaskets have been replaced with no permatex. everything went together good. ??????????

 

[Harleyguy]

Re: omc 3.0 water in oil

the rockers were way to tight with wouldn't let the valves close . adjusted them and it started. now the problem is there is still water mixing in with the oil.

 

[Don S]

Re: omc 3.0 water in oil

How many times have you changed the oil. one change is not going to get all the water out. 5 or 6 may not get it all out.
Is the level rising? If not, change the oil a couple of times and use half oil and half diesel fuel, run at idle for 10 minutes each time. Then put in clean oil and filter. Run it under load for a while which should burn off any lingering moisture. Then check the oil level and see if the oil is milky again. If it is, you probalby have engine problems.

 

[Harleyguy]

Re: omc 3.0 water in oil

Thanks I will try that. I did drain all the oil by the plug . The omc oil runs me $20 + 12 for the filter, Would a strait 30w be ok for doing this and a fram oil filter? My auto mechanic is telling me the oil and h20 is mixing when he removed the valve cover and saw the oil on the rockers. I went over there to set the timing ( any body know what it is? tdc 3rd v down? ) and he said drain oil, clean it up with parts cleaner by letting it drain thru the engine and out the plug, tear it down looking for mistakes. Remove the head and have it machined for $150 put it back together and there should be no h20 in oil any little bit will burn off. The oil is pretty ulgy and scary looking to me right now. I have only ran it for 5min so far since the surgery on it.

thanks

 

[a70eliminator]

Re: omc 3.0 water in oil

Has your mechanic mentioned a leak down test? As don already said there will be alot of contaminated oil laying in pockets inside the block 1 oil change and 5 mins run time is not going to do it.

 

[Harleyguy]

Re: omc 3.0 water in oil

No he hasn't, Im going to do all the work I can on it myself. Like I said I would rather start with what don said. But the oil is so expensive. What would you do?

thanks

 

[Dakota47]

Re: omc 3.0 water in oil

Go to wal-mart and buy Pennzoil 10W30 hd. $2.25 a quart.

 

[Dakota47]

Re: omc 3.0 water in oil

Or you could just but the Wal-mart Tech oil 10W30 for $1.19 ..

 

[Harleyguy]

Re: omc 3.0 water in oil

thanks wal mart is down the road. How do I run th e boat with a load on it?

 

[Bondo]

Re: omc 3.0 water in oil

How do I run th e boat with a load on it?

Ahhhhhhh,............. Go Boating,..??...................

 

[Harleyguy]

Re: omc 3.0 water in oil

changed the oil 6 times w/the 50/50 mix. still milky. should i still run it w/ a load on it and heat it up ?

 

[Don S]

Re: omc 3.0 water in oil

When you ran it between oil changes, did the oil level rise?????

It shouldn't take that many changes for the oil to be clear, unless there is water getting into the engine.

Drain the cooling system, block off the water hoses going to the manifold and coming from the outdrive and pressureize the cooling system. Should hold about 15 or 20 PSI

 

[wire2]

Re: omc 3.0 water in oil

changed the oil 6 times w/the 50/50 mix. still milky. should i still run it w/ a load on it and heat it up ?

What 50/50 mix?

 

[Harleyguy]

Re: omc 3.0 water in oil

Oil and diesel fuel, The oil didn't seem to rise enough to see by the eye but it is not clear (milk)...................... But leak down test next on list.

thanks

 

[Harleyguy]

Re: omc 3.0 water in oil

I cant figure out how pump the air with some kind of nipple or somthing. People are telling me that it runs to good to be the head....they say block .....or exhust flappers? What do I do?? tear it appart and get a block? or spend $100 for a marina to check it over??

 

[dcg9381]

Re: omc 3.0 water in oil

You should do a leak down test. It's similar to a compression test, but puts pressurized air into the cylinders and helps to determine how much air is leaking out.

It'll also help you "hear" a head gasket issue if you have one. It's easier on cars because they have closed loop cooling systems and listening for bubbles is cake.

It's normal to have some water in the pan after swapping the head.. After swapping it, drain the oil via the pan bolt, and put new oil in... You're ok using auto oil (cheap) and an automotive filter in my opinion.
Mark the oil level after you start it... you want to just begin to pump the oil around. Run it again up to operating temp on a hose - check for oil rise or water in the oil.

 

[Harleyguy]

Re: omc 3.0 water in oil

Failed Leak down test. Water in cyl 3. Had the head checked over and the valves were re-seated before and thats where the leak was. Now install new head. Thanks for all the info guys , Hopeful I can anwser a question someday..