VCCA Home Forums TECHNICAL - 1945 AND NEWER 1961-1964 1963 impala - radiator

Yes, they are....dead center on both.

Bob

it's pretty interesting:

the 327 and "409" radiator are the same width overall when including the mounting brackets...

the filler necks are centered in both radiators and the car...

the 327 & 409 thermostat housing outlet are centered on the engine and the car...

verne measured a 409 radiator and says the distance between filler neck and radiator inlet is 9"... this suggests that the thermostat outlet and radiator inlet are also offset 9"...

the napa auto molded upper radiator hose for 409 (without a/c) only had a 6" offset...


what's wrong here?..

Here's what I do whenever I can't find the right hose. I simply take a clothes hanger or similar wire, bend it to the shape that it needs to
be to connect to both outlets, and then I go to O'Reilly's or Napa and explain what I'm doing. They are great about letting me go back and
find a hose that will work. I may have to cut off a slight amount from each end, but 99% of the times I have found one that fit perfectly.

Bobalouie

thanks for the advice, bob...

but i'm trying to determine if the napa auto 409 hose that they offered me is the correct hose...everything i've learned here indicates that the correct 409 hose should have a 9" offset, but unfortunately, i don't have a 409 to measure myself to confirm if i have all my facts right...

I'd get the hose and if it doesn't fit, just return it.
Does NAPA have a different listing for a hi-perf 327 with A/C?
Verne

no, they list the 327/300 w/ac and 409 w/ac as being supported by the napa auto universal flexible hose only...

how is the 409 w/ac different than without a/c?..

That's not the question. A 409 with A/C is a completely different radiator.
I'm telling you a 300hp 327 with A/C uses the same radiator as a 409 (without) A/C. The hoses should be the same. You said the NAPA hose for a 409 has a different measurement than you need, so I asked if NAPA has a listing for a different hose for the hi-perf 327 with A/C. It's the SAME hose, but NAPA might show it differently and maybe that is the one you need.
You said they stock a hose with a 6 offset, but now you say they only offer a flexible hose, so they can't help you. Have you tried searching Google for reproduction radiator hoses? See what applications come up.

Verne

Here is what I can offer. I have a '64 Belair with the 409", 425 horse motor.

NO A/C It has the heavy duty, slanted top radiator.

I measured for you, and going from the centerline of the thermostat housing to the centerline of the radiator inlet, it is offset towards the
passenger fender by 10 1/2".

Also, starting at the thermostat housing, the hose extends 6", then makes a 45 degree bend towards the passenger fender; from the center of
that bend to the center of the next 45 degree bend, it is 9 1/2" long. From the center of this bend to be flush with the radiator inlet, it is 4" long.

Napa does list a molded hose, NBH 7209, that states that it is a cut to fit design. I looked at mine and I did cut one end to fit perfectly.

The original GM part number was 3780334, which you may be able to use to cross reference with Gates or Dayco.

O'Reilly list a molded, cut to fit under part number 20380.

Hope this helps,

Bob

verne:

napa lists the 327/300 with a/c as requiring the napa auto universal flexible hose...so they do not have a molded hose for that application...

i did order a molded hose from show cars for a 409, but it did not fit...it only had a 6" offset...they do not offer a 327/300 a/c hose...

there is a 327/300 a/c hose from a vendor, but they said they will not measure it...so that would be a crap shoot...the same one being offered by them on ebay...

at this point, i think i'll buy the 409 hose from napa and try it on...

bob:

thanks for the info...i will use them and try some of the hoses you mentioned...

One final entry....this side shows a one for sale, original GM part number 3780334, $22...

If all else fails....good luck, Bob

https://www.jiksawonline.com/index.php?main_page=product_info&products_id=879172

thanks, bob...that's the same vendor who could not tell me the offset dimensions...