Mark SF

Hello,

I seem to have some leakage from where the radiator end tank joins the cooling element.

Is it worth trying to repair? Otherwise it looks like an all-aluminium radiator like the one by 928 Motorsports is the way to go.

So how easy is r&r? What has to come out first?

Thanks in advance

Hilton

Presumably its started leaking on the right-side (passenger side for LHD cars)?

Common point of failure - I repaired mine myself by replacing the end tank. The end tank costs about $90 including the rubber gasket, and the part number is:

No Cooler (5 speeds) - 928 106 041 02
With cooler (for auto gearbox) - 928 106 041 03

This thread here on how to do it:

https://rennlist.com/forums/928-foru...placement.html

As for good replacements - my personal current preference is the OEM one, as experience suggests its good for 15-20 years, has zero fitment issues, and isn't actually very expensive (I got a quote for one from a local Behr distributor as my plan B before attempting repair, and was very surprised how reasonable it was - on a par with the ones from 928ms and 928intl).

My preference may change if Greg Brown's planned one ever makes it as far as production.

Mrmerlin

Roger sells new end tanks,
remove the radiator,
take new tank and seal to the radiator shop thats experienced with plastic end tank radiators,
they will have the correct tools to effect replacement,

Also remove the thermostat and replace it,
as well as the rear thermostat seal and O ring and get a new coolant bottle cap and
2 fresh gallons of coolant try the Z 05 Zerex,
drain the block as well it holds 2 gallons
Coolant system should be good to go for a long time

supercedar

I believe you meant to say G05. At least I hope so because thats what I used.
Thomas

mcholdfast

I replaced the end tanks on the radiator in the Murano car last weekend for the same reason. I followed the directions in this thread and had no problems at all and no broken tabs. Move the power steering reservoir over, lift out the fans and then the radiator. Don't forget to disconnect the temp sensor in the bottom of the rad. Less than $200 for new end tanks and seals sure beats the price of a new radiator.

Ad0911

Find a company tha can pressure test your radiator. Mine seemed to leak too, until I discovered with this pressuretest that the plug on the top side of the right tank was leaking. Only another seal was needed to stop the lleak. I believe both tanks are the same but the right one is mounted upside down compared to rthe left one. The plug on the right side is where the thermostat switch sits on the left side. My car is a '78.

Mark SF

Thanks for all the advice, I'm going to get it on the ramps this morning, warm it up and see if I can locate the exact source of the leak. It does look like the passenger side tank seal though, and the car is LHD.

Mark SF

Well it's definitely coming from the joint between the end tank and the core. Guess the next step is to take out the radiator.

928 at last

and if you're going to do the job yourself, it's easier on the tabs (i.e. you'll have more left) if you temper them first. A commercial grade heat gun will work. Best suggestion is to get the parts from Roger, and have a local rad shop that's experienced with the plastic/aluminium set up to do the work.

Good luck!