Range Rover EFi (hot wire) heater plumbing
Discussion
Hi,
I am presently moving into the age of EFi in the quest for improved fuel economy. I have the EFi manifold / plenum assembly installed and one of the problems I have come across is how to plumb the heater in. Working from the right-hand side I have the siamesed metal pipe (one with filler) which runs to the heater. Obviously at the flywheel end these connect to the heater. The problems occur near the front of the manifold...
On the RH side of the manifold is a port into the water jacket which had a hose adaptor in, where does this run to?
Also at the bottom front of the manifold is another, blanked off, port into the water jacket - on the parts diagram I saw this was plumbed to the heater pipe via a hose with two 90° bends (like a bus-stop) in it.
The other heater pipe has a hose with a single 90° bend linked to the back of the water pump.
If this correct do I plumb the other water pump port into the port on the RH side which I mentioned first?
The reason this is a bit puzzling is because:
the installation is in a Bowler
the EFi kit is second hand and missing parts
the engine was originally carburetted but IIRC the timing cover and water pump are much the same on the pre-serpentine variants in Range Rover.
What would be really useful is a photo or few of an installation. I will try and post some of the problem areas tomorrow as there is plenty of other work to do yet!
The various workshop manuals are not a lot of help, I think a better source of pictures would be a parts book.
hope you can help
100SRV
I am presently moving into the age of EFi in the quest for improved fuel economy. I have the EFi manifold / plenum assembly installed and one of the problems I have come across is how to plumb the heater in. Working from the right-hand side I have the siamesed metal pipe (one with filler) which runs to the heater. Obviously at the flywheel end these connect to the heater. The problems occur near the front of the manifold...
On the RH side of the manifold is a port into the water jacket which had a hose adaptor in, where does this run to?
Also at the bottom front of the manifold is another, blanked off, port into the water jacket - on the parts diagram I saw this was plumbed to the heater pipe via a hose with two 90° bends (like a bus-stop) in it.
The other heater pipe has a hose with a single 90° bend linked to the back of the water pump.
If this correct do I plumb the other water pump port into the port on the RH side which I mentioned first?
The reason this is a bit puzzling is because:
the installation is in a Bowler
the EFi kit is second hand and missing parts
the engine was originally carburetted but IIRC the timing cover and water pump are much the same on the pre-serpentine variants in Range Rover.
What would be really useful is a photo or few of an installation. I will try and post some of the problem areas tomorrow as there is plenty of other work to do yet!
The various workshop manuals are not a lot of help, I think a better source of pictures would be a parts book.
hope you can help
100SRV
There were a number of versions to the pipe runs.
I have a 3.9 serpentine so likely different again.
One of my steel pipes running alongside the plenum goes into a 90 degree hose and onto an even larger spigot on the inlet body just behind the thermostat housing. You will need this size changing hose as nothing else fits.
The other pipe goes into a 90 degree hose and joins another steel pipe coming up the front of the engine behind the alternator etc which in turn is connected to the bottom hose.
I don't have the fill pipe version but a diagram in Haynes shows that the fill pipe sits outboard of the other pipe if that helps.
Steve
I have a 3.9 serpentine so likely different again.
One of my steel pipes running alongside the plenum goes into a 90 degree hose and onto an even larger spigot on the inlet body just behind the thermostat housing. You will need this size changing hose as nothing else fits.
The other pipe goes into a 90 degree hose and joins another steel pipe coming up the front of the engine behind the alternator etc which in turn is connected to the bottom hose.
I don't have the fill pipe version but a diagram in Haynes shows that the fill pipe sits outboard of the other pipe if that helps.
Steve
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