coolant
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Freshman User
Joined: Aug 2003
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coolant
The engine coolant in my 03 7.3 Ex will not stay at the max mark. It will always end up about 1 1/2 inches below the min mark. I have refilled it several times. I drive it for a week or so and it ends up about 1 1/2 inches below min and stops. It doesn't continue to drop. Any ideas?
Posting Guru
Joined: Dec 2004
Posts: 1,102
Likes: 3
From: Virginia - SW (Riner)
Coolant loss
Look in the area around the waterpump - t-Stat housing. Bet your WP is on it's way out. That's the way mine started. Wasn't enough of a leak to leave anything on the ground but, I would gradually loose coolant. Just a little bit from week to week. Another area to look @ is the hose clamps on the U&L rad hoses. The OEM ones are known to break from time to time.
Hope this helps,
DG
Hope this helps,
DG
New User
Joined: Nov 2004
Posts: 20
Likes: 0
My 99 did the exact same thing after I changed the WP. It turned out that I had a small leak around the t-stat housing. A leak in that area lets coolant leak from the top hose and then no more. That is why it stops a little below the mim mark. Hopfully it is the t-stat or a hose connection. If it is the WP its not too bad of a job.
