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2003 GMC Yukon Question: how do i determine if an internal coolant leak is the falt of a bad intake gasket

 

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merton, Fort Myers, FL, June 03, 2012, 11:48
 Rookie

or a blown head gasket

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    Greg's Orange Auto (14209 Answers) , Orange, CA - (714) 361-9386
    globalhelper June 03, 2012, 15:31
     Master

    do a chemical test on cooling system. do you have water in oil or oil in water?have you ever overheated vehicle?

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  • Answer #2

    Autohaus Lake Norman from Autohaus Lake Norman, June 03, 2012, 15:34
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     Journeyman

    If you have the 4.8/5.3/6.0 engine, then its most certainly NOT the intake gasket, because these engines use a "dry" intake (no coolant goes through the intake).

    If your getting coolant in the oil, then you may have a bad oil cooler (if equipped) or a bad cylinder head (common with these cylinder heads). To verify if its the head, fill the cooling system full (no air pockets) and then pressurize the cooling system. Remove the valve covers (both) and let sit for 5 minutes. Then inspect around the middle row of head bolts (between the rockers). if you see coolant puddle on top of the standing oil, the heads are porous.

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    moebee, November 25, 2012, 06:32
     Rookie

    i have antifreeze leaking soon i put in in tha morning, i can see it comming from the bottom, and its also sweaks in the morning but stops after i drive for awhile

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  • Answer #3

    June 03, 2012, 20:11
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     Master

    I live in Ft. Myers. Contact me buy email if you want help. jmgrhm30@gmail.com

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