I have a friend that has a severe leak on the rear of her engine. I mean as
fast as a water hose can put water into the expansion tank, it comes pouring
out somewhere on the rear of the engine.
Its a 98 F-150 ext. Cab with a 4.6L A/T. Its got about 150,000mi on it.
I am good with cars, hell I worked on the Ford hotline, so I know what to
look for, but what I am looking for here is if anyone has seen this before.
I know full well it could be a bad freeze plug (what I am leaning towards),
or a cracked block, or better yet a corroded heater line coming off the back
of the engine. The reason I am checking here, is to see if anyone has seen
this before, because you have to pull the engine to be able to see it, or
remove everything down to the lower intake. Either way, its more than I want
to do so I can diagnose her engine problem. I am looking for people that
have worked on a specific case that matches this one.
I found the original source of the problem, I think the engine overheated
due to low coolant level, and inadequate coolant mixture. She has a leak on
the air purge between the top of the radiator and expansion tank, and she
let it get low a couple of times, and didnt put 50/50 mix back in it.. Just
water. So I think the truck boiled the water off inside the block and either
blew a freeze plug, or cracked the block. Either way, since you either have
to pull the engine or trans to get to the leak, she knows its not goin to be
cheap to fix. My experience with this engine is limited, so any body who has
seen this before. I would appreciate the input.
P.S. I am only looking for techs that have worked on this problem before,
not input as to what you might think it is, due to experience on a different
engine ( I have that experience), only this engine, and only with the metal
heater lines running out the rear of the engine. Thanks