98LS-WON

Before you say "Hey dumba$$, go measure it yourself", I'm abot 6000 miles away from my car at the moment. I want to make sure I have everything I need when I get home because I'm installing a new cam. I might as well drain the cooling system while I'm draining the radiator. I know for a fact that I don't have a large enopugh allen wrench because the last time I though about draining it I just drained the radiator because I was too lazy to go to the store at the time. Thanks for the help.

98TXFBODY

3 of em use a 8mm and one uses a 17

777

iTrader: (21)

what do you need to drain the radiator...my petcok valve will not turn...is there an allen wrench for that...or is it just stuck?

Viper

iTrader: (6)

Sounds stuck; mine turned with a pair of pliers. How many miles on the 98'? Ever do a drain and refill? If the petcok hasn't been opened in 7 years, I imagine it might be a little sticky.

gojo

iTrader: (12)

It does not screw out. Dont try to do that. Turn it about a 1/4 turn so it move out of it's notch. Then, pull it outward.

Brains

iTrader: (7)

Then I must be crazy, because the dozens upon dozens of LS1s I've worked on over the past few years ALL had petcocks that threaded out.

777

iTrader: (21)

well it has 100k miles on it and i'm farily sure it was drained because the cam was installed by someone else before i bought the car a month or two ago...but it actually broke some of the plastic when i tried turning it with some pliers...

VSGLS1

iTrader: (8)

You are not crazy, they are threaded. No pulling involved.

Good Doctor

iTrader: (1)

vettes are different from F cars. One is a pull as you twist, the other is threaded.

gojo

iTrader: (12)

How about later model F-bodies? Just curious.

Brains, you could still be crazy.

ls1290

iTrader: (20)

C5s use the 1/4 turn and pull valve

Keith

777

iTrader: (21)

and f-body's use....i'm still wondering how to be able to drain the radiator through the valve