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I have a 2001 2.2L gt pontiac sunfire.im wondering what could cuase coolant to leak from the bottom of the intake manifold. That's where it semms like its leaking from because its coming from above the head gasket which I just replace. I bought the car knowing it had a blow head gasket. The car runs and sounds fine but the oil and coolant are mixing and there's coolant leaking from the back side (the cab side of the engine) above the head gasket. The leaking started after the head gasket replacement. Thanks for your time.

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  • Cars & Trucks Master
  • 957 Answers

You could have a bad intake gasket that is allowing coolant to go into oil. if the head gasket is good then the other thing it could be is a crack in the engine.

Posted on May 08, 2014

  • Remington Langworthy
    Remington Langworthy May 19, 2014

    It was a fuel like. Fuel rail wasn't put on right and just needed a good flush

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SOURCE: I have the crappy Fireturd intake manifold issue...possible blown engine

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on the 3.8 ussaualy not the head gasket but the upper intake gasket . antifreeze leaks inside intake and into the cylinder. very common. the new gaskets are much thicker.or the plastic plenum the black plastic part on top of the engine goes bad around the water inlet and need to be replaced . when i do either job itell the person to replace both at same time saves money and headaches in the near future. hopes this helps .....and cost for a shop to do this $1100 to $1500

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SOURCE: I have a 1996 Toyota RAV 4 that leaks engine oil. ...

same here on my rav4 1996,i just put in oil stop leak been ok for 8 months :) you will always get hatters of oil stop leaks,but they work ok,though i find don't like them have never used them

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Mustgo
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SOURCE: have a coolant leak on a 96 4.0 engine that

The head has freeze plug(s) to prevent engine and head from cracking under extreme hot (over-heating) and cold (sub-zero temp).

When the coolant system over-heat,the hose and radiator are the 1st defense.

If the drive keep driving the freeze plug will give out to protect the engine block and head.

======

Here are few pictures of freeze plus.

Link HERE

Posted on Sep 10, 2011

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2001 pontiac sunfire will not hold any antifreeze, why and whats wrong with my car????


General advice:U must track the leak .How much it takes to loose the coolant?.If the coolant shows under the car must identify the tubes clamps that need tighten or replace.If a radiator related problem need clean/solder/replace.If leaky water pump,replace.If no trace of coolant ceck the oil.If is color altered(milky)u have a head gasket ahead (with head revision)or a broken engine block/piston cyclinder.If the oil is ok,ceck the smoke:whity smoke means coolant in the pistons head.Again best guess:head gasket (can leak also in the intake manifold).Very rare coolant shows in some cars in the power stearing oil (!?) track the tubes.Tip:colored coolant (green...)is better visible in leaks.Tip:water coolant may show rusty spots where dissapearing (radiator,expansion deposit,pitched tube).Hope u deal it.Cheers.

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