Where would coolant be leaking from at the rear of the engine, drivers side on a 98' suburban
INTAKE GASKET ,THEY ARE MADE OF A HARD PLASTIC AND CRACK EASY,THIS IS COMMON ON THE 4.3 AND UP ENGINES,S 10 BLAZER SUBURBAN AND FULL SIZE TRUCKS.IT IS REALLY EAZY FIX.U CAN DO IT YOURSELF SAVE ABOUT 200 IN LABOR COST.PICK UP NEW GASKET AT LOOCAL AUTOZONE AND A TUBE OF BLACK SILICONE,WHEN REMOVED AND CLEANED SMERE A LITTLE SILICONE ON HEADS FOR A LITTLE EXTRA INSURANCE.DONT BE FOOLED AT WHAT U SEE UNDER HOOD IS REALLY EASY JOB. I HAVE REPLACED THEM AT 25OOO MILES.
Could also be a head gasket or freeze plug, I have seen the freeze plugs leak there also.
Most likely freeze plug or blown head gasket. What ever is more expensive and hard to replace. I own a shop and for the past year I have had about 22 of them come in that needed either the freeze plugs or the head gaskets replaced. All though I would definitely check your upper and lower intake manifold gaskets as well. If it is a intake leak, be careful not to crack the plastic upper intake manifold when removing or installing, they break for like no reason.
The possible leak points include hoses, the radiator, heater core, water pump,head gasket, freeze plugs, automatic transmission oil cooler, cylinder head and block.
those are notorious for intake gaskets. i do 3 to 4 a week
Ya i've also seen many intakes on the 90's small blocks go bad, easy enough fix tho
mine just had an intake gasket go in the same exact spot at 70,000 miles prob intake
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