Aftermarket Alloy Radiator

[Wacky Dee]

I'm using the Nulon premixed green stuff .. 33% glycol the rest demineralized water,

My understanding of earthing kit perhaps making it worse is because the earth wire could actually be used by the stray currents to actually enter the coolant rather than leave it .. depends on where the bad earth is I guess. No point in guessing though, checking with an accuirate analogue multimeter should be easy enough.. I'll let you know my findings tommorow.

[geraus]

wtf seriouse??? i never knew this.. all i do is flush out the radiator, leave the A/C on hot temp and idle the car till the thermostat opens and just flush it with my hose then i put in coolant... like coolant thats already premade....

[PM-R33]

Let me know how you go with the multimeter, i'll have to do mine i suppose. Mine has been the way it is for a few months now, and i don't see any signs of corrosion so i dunno.

[l0WRB]

im fitting my ISC rad this afternoon, still undecided wether i should earth it or not... is the factory radiator in r33 gtst alloy cores? if i had problems surely it would have eating that

[bubba]

I earthed my ally radiator using an old amp earth lead, straight to the battery.

Been fine for the year or so I've had it with no signs of corrosion.

[Wacky Dee]

where did you attach the earth wire on the radiator side ? My new alloy rad doesn't touch the chassis anywhere so I'm not quite sure where a stray current would enter from.. unless it comes through the coolant from the engine side. So I suppose if it's going to enter from the engine coolant the best place to earth the radiator would be somewhere near the top hose ??

[bubba]

One of the bolts that holds the shroud on.

[l0WRB]

well radiator is in and fitted ...

put a multi meter in the coolant when hot, got a reading of around 0.02v is this bad? lol

[PM-R33]

According to NS anything about 50mV, so seems you are ok. So is it just saying that if you have dodgy earths in the car that electrolysis can happen in the cooling system? So just make sure all your main earths near the radiator are fine. Doesnt actually mention earthing the radiator does anything, says other earths near it cause it. So not sure why some of you have earthed your radiators.

Edited September 24, 2009 by PM-R33

[08r3308]

where did you attach the earth wire on the radiator side ? My new alloy rad doesn't touch the chassis anywhere so I'm not quite sure where a stray current would enter from.. unless it comes through the coolant from the engine side. So I suppose if it's going to enter from the engine coolant the best place to earth the radiator would be somewhere near the top hose ??

from your temp sensor thats where the current will be coming from , just attach a wire like others said

i will get some pics later on tonight

[08r3308]

pic i promised

[Wacky Dee]

well radiator is in and fitted ...

put a multi meter in the coolant when hot, got a reading of around 0.02v is this bad? lol

That's probably not VERY bad but it's still no good to have anything above 0v.. tried earthing the radiator ?

Got myself a cool multimeter today but didn't get a chance to measure it as it got dark, will do tommorow. Just a question in regards to earthing wire .. thicker is better right? ie. less resistance the more strands etc If I get anything above 0v I'll get the thickest gauge copper cable and run it to the battery negative post..

[bubba]

So not sure why some of you have earthed your radiators.

Because the place where I bought the radiator from said to earth it..

[PM-R33]

Hmmm fair enough, its just after reading that atricle it seems that isn't exactly the problem, not having the radiator earthed. I havnt had mine earthed and it's fine. Its the electrics around it, headlights etc which cause the problems of stray currents. So shouldn't the solution be make sure they are all well earthed? I dunno, this is just my understanding from that article.

[bubba]

Well, being that I have had my engine in and out several times, I know all my earth straps are good. But considering that the people I bought the radiator from advised to earth it, I thought it was prudent to do so.

[08r3308]

i upgraded my engine earths too , so how much that diff makes i dont know but i guess peace of mind.

especially shitty one of manifold to engine bay

[PM-R33]

Yeah i've got a full earth kit through mine. The factory engine earths are fairly average.

[Wacky Dee]

happy to report multimeter showed 0v in the coolant ..and that's on a 100mV setting, needle didn't budge.

[l0WRB]

hmm i think the setting i tried it on was the 200mV setting.

[Guilt-Toy]

if your battery is in the boot, how do you do the miltimeter test? i have never seen one with wires that long?