radiator cap
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Senior User
Joined: Feb 2008
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From: San Diego area. calif
radiator cap
I was out runnin the truck to find a suspected a leak.I found earlier 2 dried "wet" lines at the top. Ive got the orginal 53 rad. just pressure tested..passed..seems to keep it cool ( 302 small block) soooo I shut her down after 30 min 195degrees no leak but the darn 7 lb cap starts dripping,I have a overflow that works, fills and drains etc. So how do I stop the drip? Is it a bad cap? Do I need a smaller lb pressure cap? O yea the radiator place did mention 7lb should be ok
Help I want to drive to the western nationals
(2 hours) and worry only about the things I dont know I should worry about
Help I want to drive to the western nationals
(2 hours) and worry only about the things I dont know I should worry about
Last edited by 53lakeside; Jun 10, 2008 at 10:47 PM. Reason: is this as simple as a new cap?
Clean & Classy
Joined: Dec 2004
Posts: 1,656
Likes: 20
From: Riverside CA..
Mark, do you mean it starts dripping from around the cap? If so I would say you have a bad cap. It would seem then that it is only leaking when the cap is releasing pressure to the overflow, does that sound about right?
Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
Wow, I haven't seen a 4lb cap in a long time!
I'd also check the top sealing surface of the radiator filler neck to make sure it's flat. You might also have a pin hole where that is soldered on to the radiator, and it's shooting up under the cap then dripping down.
I'd also check the top sealing surface of the radiator filler neck to make sure it's flat. You might also have a pin hole where that is soldered on to the radiator, and it's shooting up under the cap then dripping down.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
4 lb. pressure radiator cap(s)
Anyone looking for an original FoMoCo 4 lb. radiator cap?
1948/51: A1TZ8100A (replaced 41A-8100-C)
Kinsal Lincoln/Mercury in Beaumont TX has two / Bob Allen Ford in Overland Park KS has two.
Griesel Motor Co. in Okarche OK has one / Bowman Sales in Bowman OK has one.
Pleasantville Ford in Pleasantville NY has one.
greensalescompany.com (800-543-4959) has eight - verify they are originals.
--------------------------------------------------------------------------
1951/56: B2TZ8100A (replaced 1T-8100-A)
Lyle's Ford-Mercury in Eagle Grove IA has two.
greensalescompany.com has ten - verify they are originals.
1948/51: A1TZ8100A (replaced 41A-8100-C)
Kinsal Lincoln/Mercury in Beaumont TX has two / Bob Allen Ford in Overland Park KS has two.
Griesel Motor Co. in Okarche OK has one / Bowman Sales in Bowman OK has one.
Pleasantville Ford in Pleasantville NY has one.
greensalescompany.com (800-543-4959) has eight - verify they are originals.
--------------------------------------------------------------------------
1951/56: B2TZ8100A (replaced 1T-8100-A)
Lyle's Ford-Mercury in Eagle Grove IA has two.
greensalescompany.com has ten - verify they are originals.
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Senior User
Joined: Feb 2008
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From: San Diego area. calif
HiThe leak is at the cap.. well just under it. The cap also has a red relief leverNow a 4lb will release the pressure earlier right? So the over flow will be usedquicker and thus take the pressure off the radiator.Is that about the size of it?Also I like the looks of the old rad. brass top and all even thro the engine is different thanks to the po.So I would like to keep this orignal. Thanks for the information and helpMark
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Senior User
Joined: Feb 2008
Posts: 113
Likes: 0
From: San Diego area. calif
Ok I just found a spilt on the filler neck just below the cap....So that is the problem...now for a little flex, a little solder,and a slow hand
Thanks for talking it out
Mark
Thanks for talking it out
Mark
