Thread: coolant pressure problem

Check for coolant in the oil and/or oil in the coolant.
Check for small bubbles in the coolant tank.
Check for loss of coolant through the overflow pipe at the coolant tank cap.
Unfortunately - most likely a head gasket leak into one of the coolant galleries in the head.

I had the same issue on a cross country trip. When I stopped about every third stop the coolant would over pressure and force out coolant while it was stopped????

I made a bee line for a Sydney Land Rover specialist - Thanks AULRO. He slid underneath and it was dry as?????? WTF???? He said it was probably the head gasket gone soft and asked what my movements were? I told him I was on a long trip Adelaide, Sydney, Newcastle, Coffs Harbour and back to Adelaide. He said I was doing the right thing, watching the Nanocom temps and coolant level. The old TD5 will go like this no worries for probably 2 years with care, finish my trip and then worry about it. Well he was right it ran like a top all trip except for the coolant thing and got me home.

In Newcastle I bought a new cap. It made no difference.

Got me back to Adelaide and go it fixed for about $1600. I had about 250,000 Km on it..

Side note, I got 9.9L/100 with a soft head gasket..

I would agree with gazk, sounds like the head gasket. If you have a little time and a reasonable lot of tools, it is not too hard to do yourself.

There is an excellent tutorial with lots of pics in the good oil here http://www.aulro.com/afvb/846562-post5.html thanks to psimpson7

B

The coolant cap is designed to allow up to 20 PSI / 1.4 Bar in the system before the relief valve opens. If there is pressure in the system, but no coolant loss, perhaps the head gasket is OK. Oil in the expansion tank could come from oil cooler O rings leaking, oil pressure overcomes coolant pressure. Before spending money on the head gasket, get further advice from a reputable LR outlet. You could do worse than talk to Dwayne, at MR Automotive. Bob


www.mrautomotive.com.au

Hi Worane,


You are experiencing the warning signs of head or head gasket failure. It pays to bite the bullet, do it yourself and save mega bucks if you can. Chasing other causes in hope starts getting expensive. Others faced with this have ended up getting a Turner head which is a great investment if you plan to keep your D2, there are some recent threads on this head issue which will help you very much. I hope it is just the head gasket as you can do that yourself fairly cheaply.


Nick

Thanks Pippin .It is starting to look like a home job.
I'm just not sure what JustinC is talking about when using a gauge (pertractor type thing ) in the head tightening sequence.

OK he is talking about each tightening sequence:
Stage 1 - 30 Nm (23 lbf.ft)
Stage 2 - 65 Nm (48 lbf.ft)
Stage 3 - 90 degrees
Stage 4 - Further 180 degrees
Stage 5 - Further 45 degrees


It is fairly easy to judge the degrees of turn using a good hex socket and long bar.


Nick