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Review on High-quality Engine Coolant Reservoir for Freightliner Models - Dorman 603-5203 by Chase Hosea

Revainrating 1 out of 5

Tried to save a few bucks and lost.

I installed this a few months ago and it seemed satisfactory although the bottom mounting hole didn't match up but since then I've had coolant leakage problems, as the sealing surface of the outlet cap is not smooth enough for the o-ring to seal on the cap. It's not very well formed. I would recommend buying the original tank.

Pros
  • Robust design backed by 100 years of automotive aftermarket experience
Cons
  • Not bad but...