Coolant question
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Member
Joined: Jul 2007
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From: Northwest NJ
'90 300E Blk/Tan
Coolant question
Since I am doing a valve job on my '90 300E, and I have to replace the coolant anyway, is there any particular coolant that has to / should be used in these engines ?
Super Member
Joined: May 2003
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From: Motor City
95 E320 Cabriolet, 108K
Yes, the antifreeze must be an HOAT (hybrid organic acid technology) type. Valvoline Zerex G05 is what you need. It's the same thing as the MB dealer antifreeze, but cheaper, and available at most auto supply houses.
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Joined: May 2007
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From: Harpenden, Hertfordshire, England
1996 W124 E320 Coupé, 1990 W124 300E twin turbo, 1991 W126 300 SE, 1984 Ford Capri 2.8i
I'd stick to MB dealer coolant. It's pH neutral and, according to those who know better than me, that is important. It's hardly a large outlay, even if it isn't as cheap as alternatives. However, if it really is 100% identical to Valvoline Zerex G05, then fair enough.
