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Dec 17, 2007 9:19 am
Dec 17, 2007 9:19 am
Subject: Re: V12 Boiling
Hi Peter,
V12 overheating is a problem we deal with very often here at LMB and it is curable on a few different levels.
Assuming the radiator is clean and in good condition!
This is the first thing to check and or replace.
Step 1. Flush the whole engine by running without the radiator and all the water hoses connected to a big 200 litre drum of water, run the engine at about 2800-3000rpm for 30 minutes, this will dislodge any rust etc in the block and also will give a good idea of pump performance, (you should see a big powerful jet of water at this speed)
Step 2. Remove original alluminium fan and fit a multi blade fan from a Jaguar Mk2. (about 4 times as efficient)
Step 3. Remove the exhaust shields (to let the cooling air from the radiator out) and wrap the exhaust manifolds and down pipes with "heat wrap" bandage.
your car should not get overly hot with these mods done, even in the mountains or
In a traffic jam the most you will need to do is raise rpm to 1500 to allow the fan to pull a little more air.
IF YOU STILL OVERHEAT, YOU NEED A NEW RADIATOR CORE.
There are a few other mods but these need head removal
so will discuss if needed.
Hope this helps,
Julian.
Hi Peter,
V12 overheating is a problem we deal with very often here at LMB and it is curable on a few different levels.
Assuming the radiator is clean and in good condition!
This is the first thing to check and or replace.
Step 1. Flush the whole engine by running without the radiator and all the water hoses connected to a big 200 litre drum of water, run the engine at about 2800-3000rpm for 30 minutes, this will dislodge any rust etc in the block and also will give a good idea of pump performance, (you should see a big powerful jet of water at this speed)
Step 2. Remove original alluminium fan and fit a multi blade fan from a Jaguar Mk2. (about 4 times as efficient)
Step 3. Remove the exhaust shields (to let the cooling air from the radiator out) and wrap the exhaust manifolds and down pipes with "heat wrap" bandage.
your car should not get overly hot with these mods done, even in the mountains or
In a traffic jam the most you will need to do is raise rpm to 1500 to allow the fan to pull a little more air.
IF YOU STILL OVERHEAT, YOU NEED A NEW RADIATOR CORE.
There are a few other mods but these need head removal
so will discuss if needed.Hope this helps,
Julian.