RFJ

just pulled radiator fill tank to put in other car and am wondering if there is anything you can do to plastic to prolong its life. Tank is perfect now would be nice to have it last. Also want to try to get a little more performance out of 85 euro by enlarging air plenum and adding air horns to the inside at inlet to runners. Any thoughts on if it would be worth it?Also is there any way a euro throttle body can be used on an s-4 as it seems larger on the euro. Am i barking up wrong tree? Just looking for the best i can get without spending to much. Most of the work i can do myself. thanks for any replies. Best ,Ray

dr bob

est way to prolong the life of the coolant reservoir is to store it in a cool dark place, and never expose it to heat or light. The plastic suffers a slow death from UV epoxidation, accelerated by increased temperature. If you plan to use it in a car during that time, all these measures mean nothing, unfortunately.

I've seen reservoirs that have been so brittle at 20 years that they came apart in pieces on removal. I changed mine prophylactically a couple summers ago prior to the ride from SoCal to DFW for OCIC, and no signs of weakness at all except for the orange color. New one is still bright white a couple years later. I'm guessing that keeping the car covered in the relatively temp-stable garage is part of that.

Carl at Motorsporst offers a nice aluminum reservoir. Just no good way to verify coolant level without opening the cap. IIRC, no fitting for the coolant level switch either.

RFJ

thanks Dr Bob (where did the Dr come from?) I was hoping someone would come up with something like the leather rejuvenator you could rub into the plastic.Well wish in one hand sh-t in the other see which one fills up first. Best,Ray. no Dr.