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View Full Version : Correct Rad Cap?

jbgroby
September 30th, 2016, 07:38 PM
I want to make sure I'm running the correct radiator cap. What does the group consensus call for with s 305 A V-6 mated to a hydra-matic? Part number is good as well.

Thanks
Jake
Jim A
October 1st, 2016, 04:25 PM
When I got my '60 3/4 with a 305A in 1970, it had a cap with a broken spring, hence no pressure in the cooling system.
I am still using that cap with no ill effects, in hot or cold weather, that I can tell.
jbgroby
October 1st, 2016, 08:46 PM
That's cool, I just did not know I'd a 15lb cap was right
FetchMeAPepsi
October 1st, 2016, 10:47 PM
IIRC a 7lb cap should be factory. At least that's what I've got in my notes.
jbgroby
October 1st, 2016, 11:13 PM
Ok, that's what I'll go with. I have the overflow tube and am trying to figure out a decent reservoir tank/bottle, what y'all got?
FetchMeAPepsi
October 2nd, 2016, 01:19 AM
I found a reservoir from a toyota corolla fits perfectly between the radiator and the battery area. No bolts needed, its sized perfectly to pressure fit right in there. Holds a good amount too. No symbols or anything, it's just a white tank.
Funky61
October 2nd, 2016, 02:03 AM
I have 7lb cap as well and I just got one of those generic over the counter units at AutoZone.
TJ's GMC
October 2nd, 2016, 05:26 AM
I have a 13 pounder on my 305E. Seems to work fine.
jbgroby
October 2nd, 2016, 01:23 PM
[
What year corolla?

QUOTE=FetchMeAPepsi;63894]I found a reservoir from a toyota corolla fits perfectly between the radiator and the battery area. No bolts needed, its sized perfectly to pressure fit right in there. Holds a good amount too. No symbols or anything, it's just a white tank.[/QUOTE]
FetchMeAPepsi
October 2nd, 2016, 07:21 PM
What year corolla?

I found a reservoir from a toyota corolla fits perfectly between the radiator and the battery area. No bolts needed, its sized perfectly to pressure fit right in there. Holds a good amount too. No symbols or anything, it's just a white tank.

I had to search my build thread again. I couldn't remember the year. It was a 1992 Toyota Camry, not a corolla. Oops!

Here's the post about it with a pic of it installed.

http://6066gmcclub.com/showthread.php?p=48940&highlight=toyota#post48940
Funky61
October 2nd, 2016, 07:38 PM
Well that looks perfect and I think I see a part number too.
Thanks Fetch!
jbgroby
October 3rd, 2016, 01:19 PM
Thanks
FetchMeAPepsi
October 3rd, 2016, 01:29 PM
Welcome guys. I'm happy with it. And if I ever get tired of it I don't have any holes or anything in my fenders. I just have to swap it out for whatever makes me happy at the moment.