overheating, which way does the water cycle?

Disco1Newbee · 15th October 2010, 07:37 AM

Originally Posted by lux201

Additional earth from negative to engine(havnt tried to body yet)

What did you go to achieve this? Its something i need to do and not really sure what it is I should be doing.

Thanks

**lux201** · 15th October 2010, 12:22 PM

Originally Posted by Disco1Newbee

What did you go to achieve this? Its something i need to do and not really sure what it is I should be doing.

Thanks

Most people seem to wire up a cable from the negative terminal on the battery to a bolt that holds the seat to the floor, instead I just copied the setup from my older 200tdi disco and ran a fat cable(used a car amplifier cable) from the negative terminal over to one of the bolts that hold on the aircon compressor.

Although I assume it is I couldnt give you a conclusive answer as to whether this is the right way to do it though as it seems my earth was already ok.

I can take a photo if it helps, just let me know.

Cheers.

**Blknight.aus** · 15th October 2010, 12:39 PM

it provides additional earth tothe battery and prevents voltage loss.

the best run is from the bolt that holds the startermotor direct to the battery

that gets you a good start.

then run a braided earth strap over the the chassis I normally do this from either the alternator to the bolt on the engine mount or from one of the PTO cover bolts to the gearbox mount (do it onto the chassis side of the mount)

If you're running back to body instead of back to chassis or back to negative cables for aux power then its advisable to make another earth lead that goes from the body to one of the other main earth points.

In the V8's install an earth line from the coil mount that runs back to the lower alternater bolt. this helps with conducting the spark voltage.

**LOVEMYRANGIE** · 15th October 2010, 05:46 PM

Originally Posted by roverrescue

Andrew I have wondered this too, and the only (this is weak I know

) thing I come up with is it gives two exhaust runners to mount the hairdryer up to.

I wonder if with more MLS (multilayer steel) gaskets getting used whether we will see less delamination failures in that area?

S

Thats ideally why MLS are used. The main thing with them is you cant really compress them any further than the thickness of the layers designed crush and when they do they bond together. The fire ring is a lot stronger on an MLS and doesnt suffer burnout like a composite.
Composite gaskets are cheap to make but the material will begin to breakdown over time from things like coolant and oil soak.
The other main feature of an MLS is that where the above happens in a composite, this can also lead to the the head warping and developing cracks as the face tension changes and becomes uneven.
An MLS also has better heat transfer equalising block/head face temperature. As before, with the fire ring compressed against steel layers that transfer heat, a burnthru is infinitely less likely than in a composite where the fibre material insulates rather than transfer.
Your only other option is to go down the nitro and methanol route and go full machined copper o ring with grooved deck and head!

Cheers

Andrew

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