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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 03-28-2012
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coolant leak

99 4.0 ohv is leaking coolant on the drivers side at the back of the engine. I couldn't see any hoses on that side. Does that mean a freeze plug is leaking? I couldn't see exactly where it is leaking.
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Old 03-28-2012
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Could be a freeze plug. bottom part of the engine? or higher up?
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Old 03-28-2012
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Lower intake gasket is shot, common issue. I did 2 last summer on my truck and my moms espo.
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Old 03-28-2012
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Quote:
Originally Posted by Blhde View Post
Lower intake gasket is shot, common issue. I did 2 last summer on my truck and my moms espo.
Thats what i was leaning towards. Its rare a freeze plug leaks on 4.0's
the backside is exactly where mine blew, and when i took it apart, i had two other leaks i couldn't see.
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Old 03-29-2012
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There is a freeze plug on the head in that area, you will need to pull the intake to get to it.

You can use an inspection mirror and a flash light to verify. If its the plug it will leak all the time, if its the gasket it will be a waterfall when the engine runs.
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