Thread: Troubleshooting Summer Overheating

Originally Posted by BusinessConnected

Ok....
Have purchased
Liquid Intelligence 239 Radiator Flush Kit
Davies Craig Viscous Coupling
Redline Water Water
New Lucas Red Coolant
New Distilled Water 10L

I have also purchased a New Radiator but I'm hoping the above solve the issues for this car, as the New Radiator is supposed to be for the "Newer" P38 I'm getting ready.

I'll let you know how I go...

I had the same problem about a year a go - fitted a new radiator and a new thermostat for good measure - problem solved. I use the old thermostat as a spare, radiator went into the bin. As the cooling system hoses were old I also replaced all of them as a safety measure.

Good luck mate! You should be able to run the standard cooling system all day every day without drama. Good to see your sticking with the factory setup.

Originally Posted by p38oncoils

I had the same problem about a year a go - fitted a new radiator and a new thermostat for good measure - problem solved. I use the old thermostat as a spare, radiator went into the bin. As the cooling system hoses were old I also replaced all of them as a safety measure.

Small hijack...
Did you source the radiator locally (recommendation?) or was it an o/seas buy?
cheers

Originally Posted by Hoges

Small hijack...
Did you source the radiator locally (recommendation?) or was it an o/seas buy?
cheers

I got the radiator from Hi Tech Radiators in Boniface Street, Archerfield.

From memory it cost around $370.00.

$270 Shipped to Melbourne from Ebay. Not sure if its any good as yet... But seller offers 12 month Warranty and I have paid via Paypal so can claim back if there are issues....

NEW RADIATOR LAND ROVER RANGE ROVER P38A INLET L/SIDE 4/4.6 LTR AT/MT | eBay

Hoges, probably dont need to tell but just in case, the Thor rad has the top hose on the drivers side unlike the link posted.

Well...
I purchased some Liquid Intelligence 239 Radiator Flush, it's in the Car now... gotta drive around for next couple of days for it to do it's thing.

However I've done some more troubleshooting and notice tonight at around 15 Degrees Ambient if I sit in the Car and put the HEVAC on HI it won't deliver hot air inside the car unless I rev the engine somewhat (to say around 1200rpm....) Once I have done that the Heat is very, very hot... for a while....

My thinking is either
a) I have Air in the Heater Core which isn't escaping or hopefully
b) I have low Coolant Flow around the system which might be dodgy Radiator and/or Water Pump...

Peoples thoughts?

Originally Posted by BusinessConnected

Well...
I purchased some Liquid Intelligence 239 Radiator Flush, it's in the Car now... gotta drive around for next couple of days for it to do it's thing.

However I've done some more troubleshooting and notice tonight at around 15 Degrees Ambient if I sit in the Car and put the HEVAC on HI it won't deliver hot air inside the car unless I rev the engine somewhat (to say around 1200rpm....) Once I have done that the Heat is very, very hot... for a while....

My thinking is either
a) I have Air in the Heater Core which isn't escaping or hopefully
b) I have low Coolant Flow around the system which might be dodgy Radiator and/or Water Pump...

Peoples thoughts?

It's more likely that the partition inside the heater matrix between the inlet and outlet pipes is broken and allowing the coolant to circulate between the outlet and inlet without going through the heater fins. When you rev the engine the quantity of coolant going through the heater increases and some of it goes through the heater fins and thus heats the air up. I think it might be time for a new heater matrix.