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2G Coolant in Oil

Posted by Vdubzr32, May 29, 2019

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  1. Vdubzr32

    Vdubzr32 Proven Member

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    Lake Hopatcong, New Jersey
    So i was finally able to start my 2g after two years. Time hasn’t been on my side to work on the car. Rebuilt fresh Head and Bottom End. The head and bottom end were done at a machine shop resurfaced. ARP stud were used and tq to spec. Multi layer Headgasket was used.

    Yesterday i added coolant, to let the car run it’s first heat cycle.

    I noticed coolant on the floor. I did my checks looked for leaks from the radiator and filling neck. I noticed the leak was coming from the tranny side of the motor. My guess a freeze plug leak. (Still have not varied that leak)

    I then checked my oil and saw coolant. So as of right now i have coolant in my oil.

    I will conduct a coolant pressure test to see what can be the issue.

    Anything I should look for?
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  2. ThunderChild

    ThunderChild Supporting VIP

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    Rathdrum, Idaho
    You're on the right track, might have to pull the year and check for any marring on the sealing surfaces. If not that, might be a crack somewhere.
    Are you running a coolant donut oil cooler? It's possible that may be bad too.
     

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  3. Vdubzr32

    Vdubzr32 Proven Member

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    Lake Hopatcong, New Jersey
    No I’m not running that oil cooler. I’m running B&M oil cooler mounter in the front.

    The crack wouldn’t that have been found at the machine shop if there was?
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  4. rEclipserGST

    rEclipserGST Proven Member

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    Columbus, Ohio
    Trans side coolant leak could be heater core. Thermostat coolant lines. Even radiator hoses. OR one of the turbo coolant lines as well.

    Upload a picture of how much coolant and oil is mixed.

    If you need to do a video as well, make an album on your facebook public labeled DSM. And drop that link. The size cap on here is frustrating sometimes.

    Could also drop some UV dye in to trace the leak.
     

    Street Build 717  25

    1995 Eagle Talon TSi AWD
    187 whp · 200 lb/ft · 2G DSM
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  5. ThunderChild

    ThunderChild Supporting VIP

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    If the properly magnafluxed it, it should have been found, but things get missed occasionally.
     

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    fwd · manual · 1G DSM

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  6. Vdubzr32

    Vdubzr32 Proven Member

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    I have no coolant lines running into the TB. I checked all the lines from the thermostat going into the heater core.

    Most of the coolant was in the engine when i drained it was about half a gallon of coolant with oil from oil pain. When i get home I’ll post.
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  7. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Ever put a head gasket on backwards?
    I no they will fit but don't know what happens other than some ports are exposed or dont match. Who did the final assembly?
     

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  8. ThunderChild

    ThunderChild Supporting VIP

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    Shouldnt be causing mixture if the head gasket was backwards somehow, might see overheating or odd temp cycles from the restriction ports being on the wrong end/side.

    The more I think about it, the more it seems that it has to be a flaw in the gasket/surface, or a crack somewhere.
    It's possible that the turbo is to blame, but same story: it'd have to be cracked or worn through somewhere, or have lines hooked up wrong...
     

    Street Build 340  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

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  9. Vdubzr32

    Vdubzr32 Proven Member

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    Lake Hopatcong, New Jersey
    I
    So i pressure tested my coolant system. It held 22 psi. I had minor leaks from the filler neck, 2 freeze plugs on the front of the block.

    If there were a crack in the block would it still hold that much pressure?

    I ended up removing the head. The head gasket looks brand new and all the entire block had coolant. When i removed the head I did notice 2 of the arp studs were loose not the bolts. Bolts were TQ down n i needed a breaker bar to loosen them. Could the two loose studs cause the head to lift n create a leak?

    How can the turbo create this problem? It has two line an in and an out for cooling.
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  10. Vdubzr32

    Vdubzr32 Proven Member

    335
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    Joined Nov 16, 2012
    Lake Hopatcong, New Jersey
    474B2F18-CC6F-4798-AB26-CB8BA5548E88.jpeg

    This is first glimpse when I removed the head.
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  11. ThunderChild

    ThunderChild Supporting VIP

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    Rathdrum, Idaho
    The issue may only present itself if the block is warm and the crack opens up from heat. If it held 22psi steady for 1 min, then I'd say it's less likely it's cracked.

    The turbo could only do this if it we're cracked or somehow the water jacket were worn through, or the coolant lines were somehow installed on the wrong ports, which is nigh impossible.

    inspect that gasket and the cylinders very carefully, and the cylinder head as well for cracks or leak traces.

    The studs being loose could definitely be a cause, they need to be finger tight in the block, also make sure all the crap is out of the stud holes/threads so they can seat properly, otherwise you will be torquing the nut against the stud shaft and could ruin them, while also causing a lack of clamping on the head.
     

    Street Build 340  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    425  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 955  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

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    1992 Eagle Talon TSi AWD
    manual · 1G DSM

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    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  12. Vdubzr32

    Vdubzr32 Proven Member

    335
    19
    Joined Nov 16, 2012
    Lake Hopatcong, New Jersey
    1DBC213B-1BA2-4377-AB44-312A534332CA.jpeg
     

    Street Build 3K  11

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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