I couldn't find much information on this, so I thought I'd post.
My LR3 is a 2006 and has 105,000 on it.
After replacing the coolant header tank a couple of months ago and doing a coolant flush I noticed I was losing a small amount of coolant that was appearing at the transmission bellhousing on the passenger side. I was a bit mystified as to where it was coming from as it also appeared just after I had my transmission pan changed.
It turns out the coolant bypass hose that plumbs into the block underneath the inlet manifold had split and was pooling coolant that was dripping down the back of the block. My T-piece breather disintegrated about a year ago and instead of replacing the whole hose I opted to just replace the T, as I suspect most people do.
It's a bit of a pain to replace the bypass hose as I had to remove the whole inlet manifold and there's a million and one things connected to it. I wondered if the throttle body could just be removed, but it didn't seem like there was enough room.
It's easy to see what hoses and connectors need to be removed, the tricky bit is there's three connectors right on the back that require sitting on the engine to remove: a vacuum hose, and two electrical connectors. The fuel hose requires a special tool to remove, but basically I just cut the end off a piece of a funnel that was about .75 in diameter and .25 long and pushed that into the connector to release it.
Once removed I cleaned the top of the block and also used some Scotchbrite to clean the gasket surfaces. I also noticed a bit of grit (and a couple of snail shells!) had fallen into the inlet throats and spent an hour or so cleaning all that out with Q-tips, alcohol, a vacuum cleaner and an airline. I used my garden sprayer without any liquid in it as an airline because the fuel line was disconnected and didn't really feel like blowing myself up with the sparks from connecting my compressor to the battery!
I bought new inlet manifold gaskets (4628235) for $50 from LR and refitted. When refitting I found it was important to pull all of the electrical connectors to one side to make as much room as possible. It's a bit fiddly to fit but not too bad if everything is out of the way. The manifold bolts are progressively torqued to 20Nm.
My LR3 is a 2006 and has 105,000 on it.
After replacing the coolant header tank a couple of months ago and doing a coolant flush I noticed I was losing a small amount of coolant that was appearing at the transmission bellhousing on the passenger side. I was a bit mystified as to where it was coming from as it also appeared just after I had my transmission pan changed.
It turns out the coolant bypass hose that plumbs into the block underneath the inlet manifold had split and was pooling coolant that was dripping down the back of the block. My T-piece breather disintegrated about a year ago and instead of replacing the whole hose I opted to just replace the T, as I suspect most people do.
It's a bit of a pain to replace the bypass hose as I had to remove the whole inlet manifold and there's a million and one things connected to it. I wondered if the throttle body could just be removed, but it didn't seem like there was enough room.
It's easy to see what hoses and connectors need to be removed, the tricky bit is there's three connectors right on the back that require sitting on the engine to remove: a vacuum hose, and two electrical connectors. The fuel hose requires a special tool to remove, but basically I just cut the end off a piece of a funnel that was about .75 in diameter and .25 long and pushed that into the connector to release it.
Once removed I cleaned the top of the block and also used some Scotchbrite to clean the gasket surfaces. I also noticed a bit of grit (and a couple of snail shells!) had fallen into the inlet throats and spent an hour or so cleaning all that out with Q-tips, alcohol, a vacuum cleaner and an airline. I used my garden sprayer without any liquid in it as an airline because the fuel line was disconnected and didn't really feel like blowing myself up with the sparks from connecting my compressor to the battery!
I bought new inlet manifold gaskets (4628235) for $50 from LR and refitted. When refitting I found it was important to pull all of the electrical connectors to one side to make as much room as possible. It's a bit fiddly to fit but not too bad if everything is out of the way. The manifold bolts are progressively torqued to 20Nm.
