C7 surge tank cap will not disengage

Push down again VERY HARD and turn CCW !! It's a BEAR !
Siggy

SunSeeker2 wrote:
IvyLog; After reading your advice about pushing down HARD; I realized I needed to get higher up than just standing at ground level. Got a small step ladder and "took the high ground" in order to push down on the cap. We have lift off! Thanks so much; its not about strength; its about leverage! Thanks to you all for your inputs; I've also have decided to replace this plastic surge tank with a metal one in the very near future.

Glad you got it off. But, getting a metal replacement tank for that particular design is all but impossible. Now, before someone gets their panties in a wad, I'm speaking of the rectangular tank that normally sits on the right side upper, just above the radiator. Most coaches have really tight clearance for those tanks. Obviously this is for rear radiator design. For this SPECIFIC design, I've seen only ONE metal tank replacement and, it was a prototype, not a production replacement tank.

Sunseeker, If your tank is not cracked, no spidering, no seeping, no obvious signs of potential failure, then don't replace it 'till you seem some of those signs. You're looking at about $130 - $140 replacement cost. I agree on preventative maintenance but, to toss a tank that's still got life in it, well, your choice.
Scott

IvyLog; After reading your advice about pushing down HARD; I realized I needed to get higher up than just standing at ground level. Got a small step ladder and "took the high ground" in order to push down on the cap. We have lift off! Thanks so much; its not about strength; its about leverage! Thanks to you all for your inputs; I've also have decided to replace this plastic surge tank with a metal one in the very near future.

Push down HARD on the cap as you turn because the second detent is not sloped...will not help pull the cap down.

I have a C7 too..

My only thought is to replace the tank as many say the tanks fail around the ten year mark.

It’s on my list for my next service whipping.