Pictures of heater/coolant hose routings?

greiswig · **Posted:** Sun Oct 26, 2014 12:59 am

Trying to get my rig back together. Silly me: I figured the service manual would have diagrams that showed what hoses fit where, but I just spent about 20 minutes looking to no avail.

Anyone have good photos of the passenger side in particular with the airbox, CAC hose and so forth out of the way?

papaindigo · **Posted:** Sun Oct 26, 2014 7:06 am

See viewtopic.php?f=98&t=74594

greiswig · **Posted:** Sun Oct 26, 2014 10:48 am

papaindigo wrote:

See viewtopic.php?f=98&t=74594

Thank you, but unfortunately that doesn't show me the money shot: routing of the small coolant hoses around the thermostat and the heater hard lines that bolt to the intake.

papaindigo · **Posted:** Sun Oct 26, 2014 10:57 am

Best I can do is a verbal description from my thermostat replacement notes.

The thermostat inflow is the rectangular hole in the head where the tstat bolts on and ALL coolant passing thru the tstat comes thru there from the engine block. Once coolant enters the body of the tstat the ports in the middle of the tstat body direct coolant flow, regardless of tstat position, thru 1) the large plastic port to the viscous heater and then from the viscous heater to the heater core (before you ask yes per the FSM coolant circulates thru the heater core all the time) and 2) the small port that is both the coolant overflow and degas (constant air bleed) port to the plastic tank on the firewall. When the engine is cold and the tstat is closed a large portion of the coolant is directly circulated out of 3) the bottom aluminum bypass port to the water pump inlet and then forced by the water pump thru the block and a small portion thru 4) the large front facing port to the radiator. As the coolant going thru the water pump directly to the engine warms up the tstat opens to reduce and eventually close off the flow thru the bypass port so that all the flow now goes thru the 2 middle ports (viscous heater and degas ports) and the front facing port to the radiator.

greiswig · **Posted:** Sun Oct 26, 2014 11:22 am

Thank you, papaindigo. Very close. I know one hose connects one hard line from the heater core to the viscous heater. I can't figure out where the other hard line routes. Nuts...

papaindigo · **Posted:** Sun Oct 26, 2014 11:44 am

The hose from the tstat to the passenger side of the viscous heater is a short very curved one. The drivers side of the viscous heater is then connected by a hose that curves up over the tstat to the upper heater core hard line, the lower heater core hard line is connected to the metal "Y" and the other leg of that "Y" is connected over the top of the engine to the EGR cooler assembly.

If you want you can call me at 850/386-6288 say about 12:30 EDT and I can walk you thru things while we look at our engine bays or if you shoot me your email I can send you some hopefully useful pictures.

greiswig · **Posted:** Sun Oct 26, 2014 11:58 am

papaindigo wrote:

The hose from the tstat to the passenger side of the viscous heater is a short very curved one. The drivers side of the viscous heater is then connected by a hose that curves up over the tstat to the upper heater core hard line, the lower heater core hard line is connected to the metal "Y" and the other leg of that "Y" is connected over the top of the engine to the EGR cooler assembly.

If you want you can call me at 850/386-6288 say about 12:30 EDT and I can walk you thru things while we look at our engine bays or if you shoot me your email I can send you some hopefully useful pictures.

Thank you! I suspect that's all I need right there. The way things landed, it didn't look feasible for the Y to hook up with that second heater line.

Pictures of heater/coolant hose routings?

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