Results 1 to 5 of 5

Thread: Coolant in Oil?

  1. #1
    Join Date
    Sep 2001
    Posts
    17

    Default Coolant in Oil?

    I believe have another issue and welcome input. Our 1994 K2500 Suburban with about 150K miles had too much fluid in the oil pan (about 1-quart over the full line) and started to blow white smoke. The coolant was low and the car alarmed. It had sat for about 6-months when all of this was realized.

    What to do considering coolant in the oil? The dealership "guessed" a failed head gasket and quoted $2,300 repair. What about internal damage due to the coolant?

    The vehicle is good shape. I planning to loan it out as a school car for my son who just graduated.

    Thanks in advance.

  2. #2
    Join Date
    Sep 2001
    Location
    Lubbock TX, USA
    Posts
    4,194

    Default

    Sounds like a head gasket with the accompanied white smoke.

    Usually not a biggie on a little coolant in the oil, fix the headgasket, drain oil, refill, shake it down. See how it goes.

    J
    1982 C10 SCSWB 6.5TD, mods too extensive to list. (13.69 1/4 mile @94.6 MPH) RACE TRUCK
    1982 C10 SCSWB 6.2NA, 2.73 700
    1986 C10 SCLWB 6.2TD 3.73 700
    1989 V20 SUB 6.2NA, 3.73 400
    1994 G20 VAN 6.5NA, 3.42 60E
    1994 K20LD ECSWB 6.5TD, 3.42 80E
    1995 K20 SUB 6.5TD, Wrecked, ran into by stupid teen.
    1995 C3500HD DRW 6.5TD, 12' Flatbed 5.13 80E
    1995 C3500HD DRW 6.5TD, 18' Rollback Wrecker 4.63 80E
    1994 C20HD ECLWB 6.5TD 3.73 80E Wifes Truck.
    1995 C20LD ECSWB 6.5TD 3.73 80E
    1995 K20LD SCLWB 6.5TD 3.73 80E
    1996 K30 DRW 6.5TD 4.10 80E
    1997 C10 Tahoe 2Door 2WD 5.7L to 6.5 Conversion Underway

  3. #3
    Join Date
    Jun 2013
    Location
    Northern Ct
    Posts
    224

    Default

    X2 from above. I think that $2300 for a head gasket is a little extreme tho.
    Even for both being changed.
    Old habits, die hard.

  4. #4
    Join Date
    Feb 2003
    Location
    Grand Rapids MN 55744
    Posts
    1,648

    Default

    What type of antifreeze is in it? The orange stuff will actually mix with oil and form a goop that will stick to the inside of everything. if you don't get rid of it, it will eat your bearings. I would change the gaskets, refill, run it to op temp and then use an oil flush product and change the oil again then change that oil out after about 3-500 miles. Might be overkill but oil is cheap and bearings are expensive. If it was mine I would do that no mater what type antifreeze it was but for sure with the orange stuff.
    Good luck
    Hope this helps
    1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
    1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
    2001 Chinook RV, V10 gas
    1974 John Deere 1530 diesel tractor
    1993 John Deere 455 Diesel lawn mower
    1967 GTO, 1989 Honda Transalp
    2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
    1998 6.5 suburban, stock, daughter's
    1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's

    1984 6.2 ATS turbo 3500, SCDWLB - Son's
    3 kids, 1 wife, 1 dog
    Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!

  5. #5
    Join Date
    Sep 2006
    Location
    Brooker, FL
    Posts
    1,217

    Default

    Dvldog is right - but ANY ethylene glycol will cause sludge.

    I would flush the cooling system to completely remove the ethylene glycol. Then change the oil/filter and run the engine for a few minutes with the radiator cap off to flush the crud out, then change the oil/filter again, and run the engine again for a few minutes.
    '94 Barth 28' Breakaway M/H ("StaRV II") diesel pusher: Spartan chassis, aluminum birdcage construction. Peninsular/AMG 6.5L TD (230HP), 18:1, Phazer, non-wastgated turbo, hi-pop injectors, 4L80E (Sun Coast TC & rebuild, M-H Pan), Dana 80 (M-H Cover), Fluidampr, EGT, trans temp, boost gage. Honda EV-4010 gaso genset, furnace, roof air, stove, microwave/convection, 2-dr. 3-way reefer. KVH R5SL Satellite. Cruises 2, sleeps 4, carries 6, and parties 8 (parties 12 - tested).

    Stand-ins are an '02 Cadillac Escalade AWD 6.0L and an '06 Toyota Sienna Limited.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •