Does anyone have a link to the layout of the engine coolant system?

 

 

Front Hose Locator View
Callout Component Name
1 Radiator Outlet Hose Replacement - Radiator Inlet Pipe to A/C Tube
2 Heater Outlet Hose Replacement
3 Radiator Inlet Hose Replacement - Radiator Inlet Pipe to A/C Tube
4 Auxiliary Radiator Outlet Hose Replacement - Left Side Radiator
5 Radiator Inlet Hose Replacement - Front Left Side
6 Radiator Inlet Pipe Replacement
7 Radiator Inlet Hose Replacement - Front Right Side
8 Auxiliary Radiator Outlet Hose Replacement - Right Side Radiator

Left Side Rear Hose Locator View
Callout Component Name
1 Engine Oil Cooler Coolant Outlet Hose Replacement
2 Radiator Inlet Hose Replacement - Engine Auxiliary Radiator to Engine Coolant Thermostat
3 Engine Coolant Thermostat Replacement - Radiator Inlet Hose to Auxiliary Radiator Inlet Pipe
4 Auxiliary Radiator Inlet Pipe Replacement
5 Radiator Outlet Hose Replacement - A/C Tube to Engine Oil Cooler Adapter to Water Pump Outlet Pipe to Engine Coolant Manifold

Right Side Rear Hose Locator View
Callout Component Name
1 Radiator Surge Tank Inlet Hose Replacement - Radiator Surge Tank
2 Water Pump Outlet Pipe Replacement - Radiator Outlet Hose to Radiator Outlet Hose to Radiator Outlet Hose to Radiator Inlet Hose
3 Radiator Outlet Hose Replacement - Water Pump Outlet Pipe to Transmission Cooler
4 Radiator Inlet Hose Replacement - Water Pump Outlet Pipe to Transmission Cooler
5 Radiator Surge Tank Inlet Hose Replacement - Engine Coolant Manifold
6 Radiator Inlet Hose Replacement - A/C Tube to Engine Coolant Manifold
7 Radiator Outlet Hose Replacement - A/C Tube to Water Pump Inlet
8 Radiator Outlet Hose Replacement - A/C Tube to Engine Oil Cooler Adapter to Water Pump Outlet Pipe to Engine Coolant Manifold
9 Radiator Outlet Hose Replacement - Water Pump Outlet Pipe to Engine Coolant Manifold
10 Auxiliary Radiator Inlet Hose Replacement - Radiator Outlet Hose to Engine Coolant Thermostat
11 Transmission Fluid Cooler Engine Coolant Hose Replacement
12 Auxiliary Radiator Outlet Hose Replacement - Radiator Outlet Hose to Radiator Outlet Hose
13 Radiator Surge Tank Outlet Hose Replacement
14 Engine Coolant Thermostat Replacement - Auxiliary Radiator Inlet Hose to Auxiliary Radiator Inlet Hose
15 Auxiliary Radiator Inlet Hose Replacement - Engine Auxiliary Radiator
16 Radiator Outlet Hose Replacement - Auxiliary Radiator to Auxiliary Radiator Outlet Hose

 

Just for my understanding on the Right Rear #14 is marked "Engine Coolant Thermostat Replacement". Is this where the Thermostat is located?

 

Thank you! That’s really helpful

 

No. The engine thermostat location is shown here:


The Auxiliary radiators (if equipped) have additional in-line thermostats as shown below (item #2):

 

Thank you. Very interesting. I have never herd of or seen an in line radiator before. I had thought that the Z51 had an extra radiator on the left rear side but never knew there is another one. Does anyone know what temperature the engine thermostat is?

 

From what I found in the service manual, it should start to open at 188°F and be fully open at 206°F.

 

My car sometimes runs at 174*F. I am guessing it has a 170*F thermostat. Non Z51

 

Thanks for the info. Holy crap that is gonna be a lot of hoses to replace when they get old. Reminds me of the vanagon cooling system. If memory serves me, the frame rails were the conveyance feature on them.

 

Thanks Z, Great Info. This is the REAL reason for the forum!

 

My Z51 has gotten to 190* only once in over a year. Even when the ambient temperature is over 115* in the summer. Usually runs around 175* to 180* most of the time. That's why I am still wondering what the real thermostat is.