Can anybody send me a picture or diagram of the correct heater hose routing for my 1962 PV544? After I finished restoration I re-connected those hoses according to a picture in a manual I saw.
But I have seen 2 or 3 different routings and I'm not sure which one is correct. The temp in the hoses is very very hot to the touch when the engine is warmed up, and I'm worried that I screwed up the hookups somehow.
Thanks!

Thanks Eric. I should mention that this engine is a B20 with twin SU's if that makes any difference. What do you think of those temperatures I found with my laser gun? Do they seem in the ballpark? The guage on the dash thruout 70+ degree ambient temperature driving stays in the green middle or slightly below middle.

Thanks Eric. That's the diagram routing I followed. Temperatures are the following:
1. At thermostat housing: 180
2. Radiator top: 193
3. Radiator bottom: 139
4. Radiator top hose: 167
5. Radiator bottom hose:159
6. Heater hoses: vary between 127 - 140
7. Engine block: 202

What temperature thermostat are you using?

Where did you get the thermostat you're using?

Do you know the name of the manufacturer of the thermostat?

We've found that 3 brands, Vernet, Wahler or Calorstat, all of which are made in the EU are the only ones we'll use in the Volvo engines we work on except for the B16s.

Unfortunately, most of the major auto parts stores don't carry those brands, but they sometimes can special order them.

I can only get them from the European specialty wholesale warehouses we buy from.

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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com

Eric, I'm pretty sure it's a 180, &I got it at IPD. Don't remember the mfgr.

Unless the majority of the driving is to be done in a cold climate, we recommend and use 160° thermostats for Volvos with carburetors.

Some people think that is too cold, so we have a 165°.

Fuel injected Volvos need at least 180° thermostats.
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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com

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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com