99 Ranger 4.0L with the possibility of an internal coolant leak.

[Fixing Ranger]

My Ranger has been sputtering around 40mph and 2000 rmp's, with rough starts in the morning. It has also been loosing small amounts of coolant and I have a lot of white smoke (steam) coming out of the tail pipe. I do not have any coolant leaking external. I have pressure tested the heads and all 6 cylinders held at 145psi for several minuets. I also pressure tested the coolant system and lost pressure very quickly. If the heads are holding pressure were is the coolant leaking?

Thanks,

 

[slammed98z]

Sounds like a Headgasket, cracked head, or cracked block. Does the "white smoke" have the faint smell of antifreeze? Which 4.0 do you have? OHV or SOHC?

 

[BrooklynBay]

Welcome to this forum! I've renamed your thread, and moved it into the Ranger section.

 

[Fixing Ranger]

Thanks, this has been a learning experience. No coolant leak, just air from changing the water pump. Found some bad injectors and replaced them. But, now receiving codes for running rich on both banks?