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Username Post: 1951 radiator cap        (Topic#357198)
Jeff1951 
Poster
Posts: 35

Age: 73
Loc: Bloomfield Township, MI
Reg: 11-12-18
07-12-19 11:47 AM - Post#2770535    

Can anyone provide a photo of an original cap from a 51 Styline Deluxe with 216 CI manual transmission? The one I have is marked "TVS" on one ear and "RC-2 4 lb" on the other. The parts book shows 2 part numbers, one being an RC-2 4 lb stamped "501" and a second that I have not seen.
Thanks
Jeff



 




2blu52 86
"18th Year" Silver Supporting Member
Posts: 18890
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
07-12-19 04:21 PM - Post#2770555    
    In response to Jeff1951

The one you have is a pressure cap, the car did not have a pressure system and the cap was pretty plain jane.

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
RAM_51 
"3rd Year" Silver Supporting Member
Posts: 5262
RAM_51
Loc: Yakima, WA. USA
Reg: 12-28-02
07-12-19 07:55 PM - Post#2770567    
    In response to 2blu52

  • 2blu52 Said:
the cap was pretty plain jane.


Not the best photo, but of a 1950 216. 1951 216 would have had the same type of cap. No levers, not even any printing or graphics on it; almost completely flat with squared up shoulders on it. Zero Pressure systems in he both he 1950 and 1951 Chevrolets equipped with the 216. The 4 LBS. cap was intended for the 235 PowerGlide engines.


Attachment: PICT0378.jpg (828.02 KB) 6 View(s)




1951 Fleetline
'51 Fleetline DeLuxe 2 DOOR SEDAN (Fathom Green)
'51 Styleline Special BUSINESS COUPE (Shadow Gray)
'53 6500 Dump Bed (Oxidized Red)
'50 Styleline DeLuxe 4 DOOR SEDAN (Mist Green)


 
Jeff1951 
Poster
Posts: 35

Age: 73
Loc: Bloomfield Township, MI
Reg: 11-12-18
07-13-19 07:03 AM - Post#2770587    
    In response to RAM_51

Thank you both for your responses! The cap on my car was obviously replaced be a previous owner with a new service replacement or reproduction. The P&A catalog shows a different part number for Power Glide than for manual. The PG one is available on eBay and from every vendor. This one is pressurized as is the one I have. The question is, is there a negative effect using the 4 lb. cap verses the unpressurized one? The car stays nice and cool now but would it also stay that way with the un-pressurized one?
Thanks again for your help.
Jeff



 
2blu52 86
"18th Year" Silver Supporting Member
Posts: 18890
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
07-13-19 07:37 AM - Post#2770588    
    In response to Jeff1951

Radiator construction is the key here. The pressurized system radiator had a small shelf built into the end of the fill pipe, the cap would tighten down on that sealing the system. When pressure hit 4 pounds then the relief valve would open. If you do not have this radiator then the pressure cap will not work and actually just becomes a standard cap, The radiator you have will probably handle 4 pounds with no problem.

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
RAM_51 
"3rd Year" Silver Supporting Member
Posts: 5262
RAM_51
Loc: Yakima, WA. USA
Reg: 12-28-02
07-17-19 06:37 PM - Post#2770946    
    In response to Jeff1951

This is an AC brand:





LINK:
https://www.ebay.com/itm/NOS-37-39-BUICK-3 7-38-CAD...

1951 Fleetline
'51 Fleetline DeLuxe 2 DOOR SEDAN (Fathom Green)
'51 Styleline Special BUSINESS COUPE (Shadow Gray)
'53 6500 Dump Bed (Oxidized Red)
'50 Styleline DeLuxe 4 DOOR SEDAN (Mist Green)


 
Jeff1951 
Poster
Posts: 35

Age: 73
Loc: Bloomfield Township, MI
Reg: 11-12-18
07-18-19 07:51 AM - Post#2770974    
    In response to RAM_51

Ram_51- Thanks for the photo! This is very helpful. I will look for either an NOS GM part (#594498) or thos RC10 (#850901 which may be a later number for same part).
Jeff



 




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