The boy's 88 300TE has been loosing coolant.
We already found a leak at the back of the head... future plan...
But today I did a Coolant preasure test.
Hissing and bubbling at 15psi on the forward edge of the radiator on the drives side... looks like the plastic tank to core is leaking... Fixable or should we just replace it?
If we have to replace it, is there anything else we should do apart from a coolant flush and hoses?

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2009 Mercedes ML320 Bluetec

Nah, you should be fine with that, even the hoses are a judgement item, it they still feel soft you might want to skip em, up to you. You'll lose a bit of atf, that'll need to be topped off. On the coolant leak at the back of the head, that might just be the rubber o-ring where the heater hose nipple fits in to the block, it's back near the oil filter, common leak.
Gilly

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Radiator replacement requried -- a friend of mine tried to fix my Volvo plastic/aluminum rad when the upper hose nipple broke off (in the drive, fortunately), and never did get it to stop leaking even with a new tank.

Hoses are cheap.

A citric acid flush won't hurt a thing.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!