I blew a heater hose the other day. I went to get a length of heater hose
cut. Luckily, I was holding the old hose as the guy pointed out that the
one end was larger diameter than the other end.
I looked at it kinda shocked. He was right. I mean, the larger end was
swollen where it had gone bad, but it was obviously a different size to
The part number tag had pretty much almost melted, but I used my best CSI
squint and cross-checked on the NAPA website and came up with...
Ford part # F37H18C266AC
NAPA part # NBH 10965
It's weird. On the heater core side it's a standard 5/8" diameter hose, but
on the water pump size it's like 7/8" or almost an inch in diameter.
When I called the Ford dealership the guy in the parts department thought I
was off my rocker. Luckily, I found one at a NAPA in town, and the guy that
sold it to me was also surprised. He said that as long as he worked there
they had never restocked that "weird heater hose" and he always wondered
what kind of car it went to. We had a good chuckle over it.
I'm just posting this to hopefully save someone else that might have this
problem later from having too much of a headache.
Very dumb design.