Chocolate milk, oil in coolant

Discussion in 'The Garage' started by sailah, Nov 23, 2012.

  1. sailah

    sailah Lampin' it

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    alright so I had an issue with oil in the coolant on my CBR project. There was zero coolant in the oil. I removed the waterpump and it looked perfect with no coolant coming from the weep hole, shaft and seals perfect. So I reinstalled that and moved on to the oil cooler which sits in a bath of coolant on the front of the engine block.

    The seals were bad, orings nasty, so they were all replaced with new OEM Honda parts.

    Oh no Mr Bill

    [​IMG]

    [​IMG]

    I also cleaned out the hoses and anything I could reach. When I was cleaning it, it seemed that brake cleaner was about the only stuff that would dissolve the chocolate milk.

    I know there is more of this in the radiator and engine block. I plan to replace the rad for other reasons so I don't want to spend a bunch of time and energy to get it boiled. Will repeated flushings work? How about that Prestone rad flush?

    I will probably just run straight tap water for the flushing process I see no reason to use coolant for a short couple hour ride to get everything nice and hot.

    Any other advice?
    #1
  2. concours

    concours WFO for 44 years

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    Pressure test that oil cooler BEFORE re-using it, air, regulated to 15 PSI. Then you need a radiator flush chemical in there, from any auto parts store. The oil residue needs the emulsifier to be flushed out. Head gasket may also be faulty.
    #2
  3. sailah

    sailah Lampin' it

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    Well, pressure testing it ain't happening, it's already installed:lol3 It looked perfect and there are many folks who have had this issue fixed by new seals.

    Is the emulsifier in a regular rad flush going to take out the oil? I have a jug of it already but it didn't say anything about oil, more for rust and calcium deposit type stuff.
    #3
  4. concours

    concours WFO for 44 years

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    Disregard the above post, I forgot, this was an artists canvas with wheels, not an actual bike to be ridden :rofl:freaky
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  5. sailah

    sailah Lampin' it

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    What are you talking about mang? I'm trying to ride it:lol3
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  6. OldPete

    OldPete Be aware

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    Note the OP's location... Turning expensive metal into scrap. :lol3

    Odds are the seals will do it but I would have checked with the cooler out.
    Over the 40 years i did diesel over-haul those coolers failed at about 10% when water was in the oil.
    90% of the time resealing did it.

    Flush the crankcase. I'd run 25% diesel fuel in the oil around the block till the engine was hot, drain and then change again(along with filters) after 500 miles.

    To flush the cooling system? Tri-sodium phosphate as per instructions.
    I'd remove the t-stat when doing this but that's just me. :1drink
    #6
  7. boasjohn

    boasjohn Adventurer

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    Try a small amount of dawn dish detergent and water in them cooling system and run to temp.it
    will break down the oil may have to do it a couple of times
    #7
  8. sailah

    sailah Lampin' it

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    Thanks guys will try the rad flush first, TSP and then Dawn just to be respectful in order:D

    There is no coolant in the oil, already dropped the oil in there and it was clean. Replaced with new oil.
    #8
  9. 1greenmachine

    1greenmachine Long timer

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    Use cascade dishwasher soap, it wont foam all over, put that in there with water and run for awhile with the t-stat open so the whole system gets cleaned. Probaly will have to drain and fill a few times with soap till the water comes out pretty much clean then do a cycle of straight water to get the soap residue out and finally fill with coolant.
    #9
  10. BluByU

    BluByU Been here awhile

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    Just a bit of TSP and a bit of dish soap will do the trick (remove T-stat first) then flush flush and flush and flush a few more times, don't want to leave anything in the cooling system that does not like to be there.
    #10