Not Coming up to Temperature

**discowhite** · 23rd June 2010, 08:55 PM

[quote=scott oz;1278732]

Originally Posted by feral

..........According to Rave the Fuel cooler thermostat opens at 82 Deg, ...............QUOTE]

Didn't think the fuel cooler had a thermostat? and couldn't see it in the manaul dont suppose you can point to the section?

I'm interested because I've taken EGR water cooler off and converted the cooling system to the MP1(?) sysem. No where did I see anything indicating the fuel cooler contained a termostat?

Fuel cooler
The fuel cooler is located on the right hand side of the engine and is attached to the inlet manifold. The cooler is
cylindrical in design and has a coolant feed connection at its forward end. A 'T' connection at the rear of the cooler
provides a connection for the coolant return from the heater matrix and coolant return from the fuel cooler.
The 'T' connection houses a thermostat which opens at approximately 82C. This prevents the cooler operating in
cold climates.
Two quick release couplings on the cooler allow for the connection of the fuel feed from the pressure regulator and
return to the fuel tank. A counter flow system is used within the cooler.
Fuel flows around a coolant jacket within the cooler and flows from the back to the front of the cooler. As the hot fuel
cools travelling slowly forwards it meets progressively colder coolant travelling in the opposite direction maintaining a
differential cooling effect.

cheers phil

**Blknight.aus** · 23rd June 2010, 09:08 PM

Originally Posted by feral

Just correcting a possible bit of mis-information here.

Once the thermostats are all open the coolant is in circulation continuously throughout the vehicle. This includes the heater core, radiator, fuel cooler and all pipe work. This occurs even if its 50 deg outside and your air con was flat out. If fact, even with the thermostats closed the hottest coolant available is first fed through the heater core.

The heater temperature is controlled by flaps in the heater not by the blocking or stopping the coolant flow through the heater core.

it does let you gauge the flow through the engine though. if the heater warms up its generally purged correctly.

**Redback** · 24th June 2010, 09:39 AM

OK well it's no different, heater is getting hot (sweating like a mongrel with it flat out) I tried it facing down and facing up, expansion tank as high as I could and there is no air coming out of the bleed on the top rad hose, it's flowing out of the bleed with a constant stream.

Apart from an air lock in the system, is there any other reasons it wouldn't come up to temp.

Never had this problem before, even when changing the radiator or even when changing the old coolent and thermostat, so what could have changed, could the fuel cooler be the problem, could it be that I changed the heater hoses and it's not purging from the heater core/matrix.

Baz.

Tombie · 24th June 2010, 09:43 AM

You fitted a new thermostat didn't you?
I'll bet the problem is there.
Put another one in.

**Piddler** · 24th June 2010, 11:22 AM

Originally Posted by Tombie2

You fitted a new thermostat didn't you?
I'll bet the problem is there.
Put another one in.

I Agree
cheers

Thread: Not Coming up to Temperature

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