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Username Post: 2003 Cavalier rad. cap. How tight?        (Topic#342860)
family4door 
Forum Newbie
Posts: 93

Loc: North Iowa
Reg: 01-29-12
02-23-17 04:31 PM - Post#2678244    

How tight is the overflow tank cap supposed to be? Just snug? As tight as I can turn with my hand? Get a big pair of channel locks?

Radiator level light came on in my daughter's Cavalier. Overflow tank was empty. Had an oil change a few weeks ago and the check sheet said the level was OK. The cap was on so tight it took all I could do to unscrew it. The cap is a 15 lbs cap but unlike a normal radiator cap that snaps into an indentation as you turn it this screws into the overflow tank. So the question, how tight?



 




junkman104 
Frequent Contributor
Posts: 1083
junkman104
Age: 58
Loc: Murphy N.C.
Reg: 01-25-14
02-23-17 05:12 PM - Post#2678248    
    In response to family4door

Hand tight, the cap has sealing o-rings that seal on the neck of the bottle.



 
rockfangd 
"4th Year" Gold Supporting Member
Posts: 2016
rockfangd
Age: 31
Loc: Utica ny
Reg: 04-13-10
03-12-17 06:16 PM - Post#2681130    
    In response to junkman104

yup.
Plastic surge cap tightens down and usually clicks when it has reached its end.
metal cap only goes so far period

Old School GM fan FOREVER


 
family4door 
Forum Newbie
Posts: 93

Loc: North Iowa
Reg: 01-29-12
03-13-17 05:21 AM - Post#2681205    
    In response to rockfangd

If it is supposed to click like a gas gap this one doesn't. I can keep tightening it until I physically do not have the strength to tighten it any more.

No more problems after I screwed it on hand tight after refilling the tank. I think what happened is the oil change place screwed it on so tight it couldn't release the pressure and leaked past the spring clamp/hose on the bottom of the overflow tank. Wet on the inner fender when we had several days of dry driving.



 
rockfangd 
"4th Year" Gold Supporting Member
Posts: 2016
rockfangd
Age: 31
Loc: Utica ny
Reg: 04-13-10
03-19-17 11:44 AM - Post#2682216    
    In response to family4door

I dont think that is possible but you never know.
It does not have to be excessively tight.
Just a little more than snug

Old School GM fan FOREVER


 




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