[dataway]

Is anyone making the molded 5/8 heater hose for a 68 with AC? I notice our host has the molded hose for 68 WITHOUT AC.

I was thinking about just getting something like a Gates 28471 that has a single 90 molded end and using that. Correct type of hose is not a concern (long as it's black).

Anyone know the approximate length required. Gates sells the hose with a 90 degree end in numerous lengths.

Thanks

[gtohurstjudge]

The A/C equipped cars never had a molded hose going to the water
pump. Because the hose was routed to a clamp on the inner fender, there was
no need for the tight bend going to the water pump.

[gto4evr]

Originally Posted by gtohurstjudge

The A/C equipped cars never had a molded hose going to the water
pump. Because the hose was routed to a clamp on the inner fender, there was
no need for the tight bend going to the water pump.

I believe he's talking about the 5/8 hose to the head, not the 3/4 to the WP.

no idea on the length. maybe they didn't use a molded hose there since it wasn't such an abrupt turn from the firewall? I'll check tonight to see if it was a specific part number in the parts catalog

[dataway]

I know the OEM non-AC 5/8 heater hose is molded at the cylinder head end, I'm not sure about the AC equipped cars.

[gto4evr]

formed to the WP but not formed to the head according to this.

listing on previous page for 5/8 and 3/4 by the foot listing says ALL for application. since there's no mention of the heater to head I'd assume that means it's just straight hose per the previous page.

curious, this is a 1972 parts book and no mention of T 71/72 with formed hoses? I thought the head hose was formed on all 68-72 T's without A/C

and, I'd agree with hurst judge about the 70 I had with A/C didn't have a molded end going to the waterpump. unless maybe it was considered molded for the end being a bit oversized since 3/4 is actually a bit too small to get over that outlet?

[dataway]

The head hose is formed on 68 Tempest without AC.

And yes, since the heater core is farther away on an AC car they might not have felt the need for a molded bend ... but I don't know.

I figure I'll use a molded 90 there anyway so I don't have to have a larger loop of hose. I know the temporary jumper hose I used from the head to the water pump when the engine was on the stand was kinking at the head, and it had plenty of slack.

[OG68]

From the 68 parts manual dated 6-1-68

[dataway]

That appears to show that the Tempest V8 with AC also used a formed inlet hose .. correct?

I see it uses two different terms ... "heater to cylinder head", and "heater water inlet" but they are the same thing ... both are the 5/8" hose to the cylinder head where the restrictor is to prevent over pressuring the core.

Just looked up the part number on PY database .. it shows the same part number described as heater to cylinderhead, and heater water inlet .. depending on year and model ... but the same part. And describes it as formed in several cases.

My guess is the only forming is the 90 degree cylinder head end.

Thanks OG

[gto4evr]

Originally Posted by dataway

That appears to show that the Tempest V8 with AC also used a formed inlet hose .. correct?

I see it uses two different terms ... "heater to cylinder head", and "heater water inlet" but they are the same thing ... both are the 5/8" hose to the cylinder head where the restrictor is to prevent over pressuring the core.

Just looked up the part number on PY database .. it shows the same part number described as heater to cylinderhead, and heater water inlet .. depending on year and model ... but the same part. And describes it as formed in several cases.

My guess is the only forming is the 90 degree cylinder head end.

Thanks OG

ah, when I read it, my brain just re-routed "water inlet" to the WP since it didn't say "to head" like the previous listing for the non A/C

[gtohurstjudge]

When I bought my GTO with A/C in 1972 it had the original heater hoses still on it
and the hose to the cylinder head was not molded, just straight hose. I've never had a molded
hose going to the head on my car as it is not necessary. On the A/C cars the hose is coming off the hot water valve which is mounted way up on the evaporator case, so there is a gentle curve down to the head from there.

[north]

Perhaps it was molded initially for the 68's and discontinued when they realized they could get away without it.

[dataway]

Keep in mind that 68 is different than the other years ... starting in 69 they had a water control valve to the heater ... the 68 and previous years did NOT have that valve, the hose went straight to the heater core inlet.

Because of the restoration parts industry everyone assumes the 68-72 are practically identical ... the 68 had tons of different parts originally .

I just ordered a gates heater hose with a 90 degree formed bend on one end that should do the trick.

[north]

That must explain it!

[dataway]

I installed a Gates 28472 cut down to size.

I cut it down to 34-34.5" on the long leg, and 2-2.5" on the short .. depending on if you measure from the centerline or not.

Looks nice and no chance of kinking.

[Entropy11]

Nice job!