Thread: Dual thematic fans on 2.2 Puma 110

I don't tow, but cooling is always back of mind. I am replacing existing HID's (where you have the round intensity's) with following:

ARB 4?4 Accessories | order)

Also thinking about replacing the Driver side wingtop access panel cover with a vent "facing rearwards"

Additionally thinking about fashioning some sort scoop/underbody plate to channel underbody airflow upwards to the engine/Gear box etc )bit of f1 tech for the landy

pd

No reason you couldn't fit it, but you'll need a second independent power relay - they're power hungry!

You won't need to move your lights, flow past them is significant and they aren't that large.

A light bar causes more air disruption for area than the round lights.

The underbelly scoop will cause more issues than it fixes - catching, throwing dirt, mud and rocks etc...

These vehicles aren't that marginal...

Good agreeable point Tombie, but I have been wondering about a dual purpose steering guard. May be Ben(APT) is reading this and could fold the metal in such a way it will deflect the air upwards into the sump/gear box area, this will also help the heat displacement from under the gearbox tunnel.

Also exposing the windtop vents on both sides will help dissipate the engine bay heat build up, might have to source cold air for the heater box from the front grill or under the head light.

APT is Ben

Originally Posted by dazzler

Good agreeable point Tombie, but I have been wondering about a dual purpose steering guard. May be Scott(APT) is reading this and could fold the metal in such a way it will deflect the air upwards into the sump/gear box area, this will also help the heat displacement from under the gearbox tunnel.

Actually it won't. You need to draw air out of there rather than try to push more in. The transmission tunnel is a big box with nowhere for the air to escape, which is why the heat builds up so much.

I've been thinking about this a bit lately after a few hot days on the freeway where all the heat coming off the transmission tunnel has made the cabin a bit too hot. I can't think of any sensible way of doing it without introducing the problems Tombie pointed out. It's a Defender after all, not a racecar.

I think the best way to get the heat out would be with bonnet vents, but I've come to the conclusion that it will be easier to invest in some more heat insulation around the transmission to solve my problem. That doesn't help with your cooling problem but I tend to think we're trying to solve a problem that doesn't exist.

Cheers,
Jon

Most vehicles get very hot in the tunnel - most just have a shed load of insulation

Originally Posted by Tombie

Most vehicles get very hot in the tunnel - most just have a shed load of insulation

True, but I think the design of the Defender's seatbox exacerbates the problem. It makes the transmission tunnel a big box with a closed end that traps the hot air.

I've sat in plenty of cars that are just a bare shell and don't ever recall feeling heat coming off the tunnel like in my Defender.

Travelling on the freeway on hot days, it doesn't take long for the centre of the back of the seat box (ie, the back face of the transmission tunnel) to become too hot to touch. I've had a few days now when this heat has overcome the air conditioning.

I don't think this affects the cooling system though as there is plenty of airflow underneath the car.

Cheers,
Jon

As a few of you have already mentioned.... air flow out of the engine is a big part of engine cooling.

I'm going through a few things with reducing engine bay heat in diesel JK Jeep Wranglers due to higher than expect engine failures, some of the items I've done may be of interest...

*Bonnet venting, as in rearward facing vents, while this isnt legal in most states (as apparently if you have a oil leak it could somehow spray over the windscreen), but I'm thinking on a Defender TDCi, the back of the power bulge would be an ideal spot to have a vent.

*Nothing wrong with adding twin electric fans, Some of you will remember the Range Rover classic, 110 V8, Discovery 1 had twins, Disco 2, Defenders had one.

*Another, while requiring a bit more nutting out is adding a remote engine oil cooler, which also increases engine oil capacity.

I havent had or seen any Defender TDCi (puma) models with over heating issues, and the above is trying to answer the OP's question.

Regards
Daz