Water in Valve Train but not really down below.
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Water in Valve Train but not really down below.

  1. #1
    The Good mrjoshua's Avatar
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    Default Water in Valve Train but not really down below.

    I went to change oil on my new 468 for the first time I have one good weekend on it. I went to pull the disributor and it was "milky" at the collar. Pulled the valve covers and found water and the the front rockers on both sides were pretty gummy. I could see down on the cam and could see milky oil in there also. I pumped the oil pan out but found little evidence of water down below. Oil was a little hazy but not milky or frothy. I run injected headers and also evacs to the valve covers. Anybody have any problem with water or steam getting back in the engine through the evacs? I'm not getting any reversion with the injection system (i don't think). They run nice and dry below 2000 RPM.

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    Senior Member stallion176's Avatar
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    top end will condensate to a certain extent but sounds that you are past that. you may want to check water pressure at cruising and wot to make sure your not exceeding the psi limit.

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    The Good mrjoshua's Avatar
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    I Do have an relief valve and also only ran at about 150* water temp. So if anything I should be able to up the block back pressure.

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    "BOATLESS" blender over's Avatar
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    Josh what do u use to regulate the water to your headers?Besides that how did it run? How do u like the ride?

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    Red Blooded American The Doctor's Avatar
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    What fuel are you running? Anything with ethanol or methanol in the fuel will cause substantial condensation, which is very normal.
    The best things in life aren't things!

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    The Good mrjoshua's Avatar
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    Quote Originally Posted by blender over View Post
    Josh what do u use to regulate the water to your headers?Besides that how did it run? How do u like the ride?
    I have a valve between the thermo housing and the T valve. I was having trouble getting a consistant result. I put in a new spring and ball in the T and that did the trick. Now you can at least ride in the back seat and not get roasted.

    Blender as far as the boat ran it was great. I'm not sure what it can truly do. Carb and timing need a little tweaking, but with 30 gal of gas and two guys 200 lbs each it ran 67 with an "A" cut. The ride is fantastic. It truly does "float". It was great to ski behind as well. I think a solid 75 mph is out there for it. I might try an A/B cut since it pulled me up just fine. Just need to find the right buttons to push. At these altitudes I'm really happy. Now if I can only keep the water where it should be....

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    The Good mrjoshua's Avatar
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    Quote Originally Posted by The Doctor View Post
    What fuel are you running? Anything with ethanol or methanol in the fuel will cause substantial condensation, which is very normal.
    Just regular premium gas. Not sure of the ethanol content required here in NM.

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    i had a little bit in my valve covers when my engine temp was low, but it blows out when i go for a cruise. 150* sounds like plenty...
    Last edited by ka0tyk; 08-09-2011 at 06:49 PM.

  11. #9
    Registered User DUYA's Avatar
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    Sounds like it may be reversion. Due to the cam profile. caused from your water running up to exhaust.

  12. #10
    The Good mrjoshua's Avatar
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    Quote Originally Posted by DUYA View Post
    Sounds like it may be reversion. Due to the cam profile. caused from your water running up to exhaust.
    I could be dead wrong but i really don't think it is. I've had wet headers on my old boat and knew how to set up the system.. As for the cam its really not huge. How would reversion cause water up top but not down below. The oil was literally black or white depending where i pulled it from. Another thing. I did find a few little shreds of oily "sponge" on the head beside the rocker. I looked in the breather and it looks like the same kind of material inside. This is what made me think of some sort of backpressure through the evacs from the headers. Could the evacs be bad? they came with the headers when I bought them used.

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    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by mrjoshua View Post
    I could be dead wrong but i really don't think it is. I've had wet headers on my old boat and knew how to set up the system.. As for the cam its really not huge. How would reversion cause water up top but not down below. The oil was literally black or white depending where i pulled it from. Another thing. I did find a few little shreds of oily "sponge" on the head beside the rocker. I looked in the breather and it looks like the same kind of material inside. This is what made me think of some sort of backpressure through the evacs from the headers. Could the evacs be bad? they came with the headers when I bought them used.
    Bingo, header Evac's on injected headers cause, just what you are describing.
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  14. #12
    21 Daytona Outlaw's Avatar
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    if your oil temp is too cold it wont burn off the condensation

    guys around here drill the injection fittings and use holly jets to regulate the amount of water
    Last edited by Outlaw; 08-09-2011 at 07:49 PM.
    #55

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    Default Simple test....

    After changing your oil, and drying out the moisture as best you can, un hook the evac lines and go for a ride... You'll either cure the problem AND KNOW where it was coming from, or eliminate the evacs as the source of the moisture.... I would hazzard a guess it isn't from the head/intake junction because that usually adds quite a bit in the bottom of the pan, and from what you're saying, the sump was fairly "dry" with clean, unpolluted oil..... How about the "drippers" in the headers? Are they dripping pretty well, or not so much? How much actual water/steam are you getting out the back? AND, are you running any water "dumps" besides the headers? Hey, just bring it out to Bullhead and we'll sort that sucker right out.... BTW, how is that Holley carb working for you? Any issues? We missed you guys at the Long Beach races, say HI to your Dad, and hope to see you on the river before we see you back at Parker races in November.......
    Ray
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    Senior Member rogerroost's Avatar
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    i've had water in oil from a blown evac valve. cost me alot before we figured it out

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