Radiatos

Theres a few posts on EO about in various vehicles .....

Some general info here --->

bahhhhhh .... lol


http://www.tectaloy.com/page12.html


In the "green" book

We often call it "earth leakage" but its actually stray currents that facilitate electrolytic corrosion in the cooling system. It is usally caused by earthing problems which is why we all mistakenly call it earth leakage. Unchecked it can cause extreme premature failure of aluminium radiators. Some manufacturers wont even honour the warranty unless you have had the system checked for stray current by an auto elec. so read the warranty well. It is not all that common but common enough to check and its done in 30 seconds.

Here is a helpful link maybe.

http://www.erareplicas.com/427man/cooling/electolysis/index.htm

Here is a testing procedure, note you need analogue meter.

Check procedure
1. Remove the radiator cap and run the engine to operating temperature. Do not rev the engine as this may cause the coolant to aerate. Note: Removing the cap will reduce the boiling point of the coolant. This may result in electric cooling fans not operating on some vehicles,

2. Switch ON all electrical items including Items such as a mobile phone, rear demister, driving lights, etc.

3. Switch an analogue multi-meter to a scale of 5 volts DC or less. Ideally the meter should be capable of reading millivolts. Do not use a digital multi-meter as its internal operating characteristics are not suitable for this test.

4. Place the negative lead of the multi-meter on the battery negative post.

5. Dip the positive lead into the coolant without touching the filler neck or the core of the radiator.




Multi-meter check procedure for stray currents



6. A reading of more than .05 volts indicates the presence of a potentially damaging stray current passing through the coolant. Ideally the voltage should be 0 volts, however it is highly possible that some voltage level will be detected.

7. If no voltage or a very low voltage is detected, carry out the same test as in point 4, but with the ignition OFF.

8. If voltage is detected, isolate the circuit by turning all electrical items OFF and switching each circuit ON individually.

Howesy,
just a question, I see you say to bring the engine to operating temp, does this mean the coolant becomes more conductive with heat or is it another reason.

Have a good one

I am presuming that is the reason that is the set testing procedure I was given so I would follow it. Suppose they wouldnt have put it in the procedure if it couldnt make a difference in some vehicles.

Thanks for that