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1937 120c 282ci rear coolant drain type?
#1
Just popping in
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l_anthony
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Hello. What is the thread type, on the driver's side rear coolant drain/petcock? 1/8" - 27 thread, 28 thread, BSPT? Taper?

Thank you in advance! LN

Posted on: 2022/9/3 20:25
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Re: 1937 120c 282ci rear coolant drain type?
#2
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DavidPackard
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That should be 1/8 – 27 tapered. 1/8 National Pipe Thread Tapered –(NPT).

The non-tapered version is referred to as National Pipe Tread Straight (NPTS), and does not have the necessary interference that forms the seal. The 1/8 -28 is likely an ISO standard typically not used in the US, but I have seen it in ‘foreign’ cars. The British Standard Pipe Taper (BSPT) is also 28 TPI, plus the thread geometry is not the same as the US standard . . . that too is not likely to seal.

In 1937 I would expect 1/8 – 27 NPT. See group 50.720 in the Utility section of the parts list.

dp

Posted on: 2022/9/3 22:06
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Re: 1937 120c 282ci rear coolant drain type?
#3
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l_anthony
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David Packard, thank you so much for the excellent clarification!

Posted on: 2022/9/4 9:25
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Re: 1937 120c 282ci rear coolant drain type?
#4
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Ozstatman
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G'day l_anthony,
to PackardInfo.

I invite you to include your '37 120C in the Packard Vehicle Registry.

Posted on: 2022/9/4 22:28
Mal
/o[]o\
====

Bowral, Southern Highlands of NSW, Australia
"Out of chaos comes order" - Nietzsche.

1938 Eight Touring Sedan - SOLD

1941 One-Twenty Club Coupe - SOLD

1948 Super Eight Limo, chassis RHD - SOLD

1950 Eight Touring Sedan - SOLD

What's this?
Put your Packard in the Packard Vehicle Registry!
Here's how!
Any questions - PM or email me at ozstatman@gmail.com
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