Third OEM Ford Coolant Reservoir/Degas Leaking at Seams - Solutions? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 09-15-2017, 02:58 AM Thread Starter
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Third OEM Ford Coolant Reservoir/Degas Leaking at Seams - Solutions?

All -

I am on my third OEM ford coolant reservoir.
  • OEM tank - 205k with no leaks, overhauled rest of coolant system so decided to replace as preventive MX - big mistake
  • 1st replacement tank - leaked at seams at 5k miles, installed with new motorcraft cap



  • 2nd replacement tank - leaked at seams at 10 miles (build date March 2017)



  • 3rd replacement tank - leaked at seams at 20 miles, (build date 7/20/17) - installed with another new motorcraft cap to be sure




Some googling reveals a few guys out there have tried 5 or 6 tanks until they found one that sealed. All of my replacements have had visibly poor mold lines and obvious low quality manufacturing. Visible gaps in the seams in multiple places, etc.

Dealer is playing nice with warranty exchanges, but i dont have time to drain and refill my coolant every 20 miles.

Aftermarket tanks are sticker shock at $400+.

General motor condition - 211k, runs great, preventive coolant flush/change at 205k to rotella ultra ELC, navistar pump, motorcraft tstat, ford hoses, ford radiator (small pinhole in original), ford tank, motorcraft cap. Runs correct temp, no smoke, steady coolant level (other than what leaks out of the seams).

Any ideas, recommendations, solutions? Keep plugging away until i find a good tank, or bite the bullet and go aluminum?

2002 Arizona Beige F250 Ext Cab Short Bed. 7.3L 6spd 4x4 140k
2" leveling kit, 285/75 Mastercraft AT2's,Napa BFF, DiPricol Pryo/Boost, DP F5 NS/stock/hi/40/80/120/140agg-lope, Toolbox, Audio goodies, IH shiftknob
muffler delete, CCV reroute, AIH/Foil delete,
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post #2 of 4 (permalink) Old 09-17-2017, 08:58 AM
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It's a shame the old one is gone.
I wonder if one from a srap yard would be a better option?
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post #3 of 4 (permalink) Old 10-15-2017, 03:22 AM
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I found a small seeping leak on the seam of my original 2002 F-350 coolant reservoir. I considered replacing but thought I'd try to repair It first. I used Gorilla instant glue gel formula along the problem area of the seam, and went a bit further than necessary just for good measure. It solved my problem. You might want to give it a try.
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post #4 of 4 (permalink) Old 10-16-2018, 06:06 PM
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Replaced mine with a Dorman bottle and Motorcraft cap two years ago. Zero issues.

The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4

6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
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