Can someone clarify the size and position ( where each hose goes) of each hose coming out the heater core in the engine compartment
CK5
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Heater hose question...
- Thread starter tj 413
- Start date
Yes and yes. The 5/8” is the heater supply/pressure side and the 3/4” is the return.
This one had both the radiator port and water pump port connected with a plastic T fitting when I bought it. And the old plastic fitting was the first thing to break when I touched it. it was far easier to plug the water pump than the radiator though when deciding which return to use going forward.
My 3/4 heater hose runs to my radiator with no issues.
I had to buy a 3/4 hose with a 5/8 size at the other end of it. The 5/8 won't fit on the intake without splitting the hose and an all 3/4 hose leaks on the heater core nipple.
Is this common with the K5'?
I had to buy a 3/4 hose with a 5/8 size at the other end of it. The 5/8 won't fit on the intake without splitting the hose and an all 3/4 hose leaks on the heater core nipple.
Is this common with the K5'?
Never heard of a step down heater hose application, my thought would be that someone swapped out the wrong fitting at some point. 5/8" into core, 3/4" out. Makes zero sense from a manufacturing standpoint to not just use the same fitting and hose as every other application.
Easy fix in the future.
Easy fix in the future.
Thankfully they make the hose that goes from 3/4 down to 5/8 which should work out fine. I didn't want to get into using a plastic/brass/etc reducer connector that gives a couple more chances of potential leaking.
1/2" is 12.7 mm and 3/4" is 19mm. I'm wondering if you have a metric hose barb at the intake. There is a 14 mm hose size out there.
Here is a cheap one on Amazon: https://a.co/d/i4WMMlx
Here is the expensive Corvette part for $14: https://www.corvettepacifica.com/pr...hose-intake-manifold-38-thread-58-hose-56-62/
For less than $15, I would replace the hose barb and run standard 5/8" hose to avoid maintenance issues. However, you can probably find someone local with stacks of GM parts in the garage that would sell you a used one for $1.
Here is the expensive Corvette part for $14: https://www.corvettepacifica.com/pr...hose-intake-manifold-38-thread-58-hose-56-62/
For less than $15, I would replace the hose barb and run standard 5/8" hose to avoid maintenance issues. However, you can probably find someone local with stacks of GM parts in the garage that would sell you a used one for $1.
