Where to from here...?

Trailstar · Jan 26, 2019

Range Rover Classic
3.5 on Lpg
Put new exhaust system on, then first start the vehicle overheated, drained coolant, flushed radiator, new thermostat, new temperature sender...and it still over heated...
So I decided to pull the water pump off....

But the rotors appear fine!?

Now I have had this vehicle for a good 3 months, and it's never overheated, almost run a bit too cool.....until just recently

So any advice would be appreciated!!!

Henry_b · Jan 26, 2019

That's probably not the original pump, looks like the old one failed and the impeller played ping pong in the housing..

freelance · Jan 26, 2019

Has the new exhaust got too much restriction, that will cause overheating, can you try it without silencer?

discool · Jan 26, 2019

freelance said:
Has the new exhaust got too much restriction, that will cause overheating, can you try it without silencer?

Well that would be a first

freelance · Jan 26, 2019

discool said:
Well that would be a first

I doubt that, funny the overheating occurred when new exhaust was fitted, we’ve thrown away silencers for restricting performance

Trailstar · Jan 26, 2019

It's got 1 hot dog silencer, and we cut some ugly restrictive repair bits out of the section b4 the Y, and then installed a 2.5" rear section that we had pre bent up.........so definitely not restrictive!!!

That's the bit that gets me is that it decides to do it now......I could accept that the water pump is inefficient if it had always run hot but it's always run pretty cool.....

discool · Jan 26, 2019

Trailstar said:
Range Rover Classic
3.5 on Lpg
Put new exhaust system on, then first start the vehicle overheated, drained coolant, flushed radiator, new thermostat, new temperature sender...and it still over heated...
So I decided to pull the water pump off....

But the rotors appear fine!?

Now I have had this vehicle for a good 3 months, and it's never overheated, almost run a bit too cool.....until just recently

So any advice would be appreciated!!!

Well the damage to the pump housing shouldn’t have happened, obviously that damage can only be done by the pump. It looks as if there wasn’t a gasket and just red sealer was used, so that would have placed the impeller closer to the housing, or of course an iffy pump bearing allowing the impeller to wobble but that’s something u would hear.

So if the impeller is slipping on the shaft ie become detached and isn’t turning, therefore no coolant circulation within the engine, the engine will overheat. If not slipping look else where.

discool · Jan 26, 2019

freelance said:
I doubt that, funny the overheating occurred when new exhaust was fitted, we’ve thrown away silencers for restricting performance

The exhaust replacements on my 3.5 were always genuine Land Rover, so never had any issues, even though both boxes only lasted two or three years and then required replacing.

freelance · Jan 26, 2019

Water pump looks like it’s been cavitatiing, did you drain coolant to fit exhaust, and not bled properly, or it’s pumping compression gas straight in there from head gasket failure

Where to from here...?

Trailstar

Well-Known Member

Henry_b

Think outside, no box required.

freelance

Well-Known Member

discool

Well-Known Member

freelance

Well-Known Member

Trailstar

Well-Known Member

discool

Well-Known Member

discool

Well-Known Member

freelance

Well-Known Member

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