Question about 1998 Chevrolet Astro

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There is oil in the radiator

My 1998 Chevy Astro has oil in the radiator and the coolant is very low in the radiator.

What is going on?


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Most likely you have a blown head gasket allowing oil to get in to the coolant.

Posted on May 08, 2010

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Check the engine oil dipstick if it is mix withe water don't drive
and check the gear oil
some cars got oil coolers
when it leak it's mix with water

Posted on May 08, 2010

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Your engine cooler or your transmission cooler has failed and the fluids are mixing in your radiator. Note the coolant is corrosive to the internal bearings to your transmission and engine. Determine which oil is mixed in your radiator, pull the dip stick on your transmission and engine and look for any signs of coolant mixing. Try not to rung the engine and flush out the engine or transmission before the bearings or damaged and will cause you to replace the engine or transmission.

Thank you for using fixya and good luck

Posted on May 08, 2010

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Could becoming from ur oil cooler lines that go into rad,,,could have internal crack in rad,,,pull dip stick out & ck to see if motor oil is low or a grayish color,,if ok ck trans fluid to see if is low,,have to find out what kind of oil residua is in the over flow jug

Posted on May 08, 2010

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Looking for the torque specs for 1998 chevy astro van?


1998 chevy astro 4.3 v6 torque specs include :
* foot pounds *
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camshaft sprocket bolt = 18 ft. lbs.
connecting rod cap = step 1 = 20 ft. lbs. step 2 = additional 70 degrees.
crankshaft damper bolt = 74 ft. lbs.
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exhaust manifold bolts = step 1 = 11 ft. lbs. step 2 = 22 ft. lbs.
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oil filter adapter bolt = 15 ft. lbs.
oil pan bolt/nut = 18 ft. lbs.
oil pump bolt = 66 ft. lbs.
rocker arm with press in studs = 18 ft. lbs.
rocker arm with screw in studs = 19 ft. lbs.
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* inch pounds *
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front cover bolt = 106 in. lbs.
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intake manifold lower = step 1 = 27 in. lbs. step 2 = 106 in. lbs. step 3 = 133 in. lbs. ** (tighten bolts in sequence)

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