Relieving Engine Bay temps - ventilation

I use to own a hilux with a 253 in it and use to battle the temps often.i put 2 of these in with the scoop(caravan vents) bits facing backwards(1 each left and right of the bonnet) so the air could exit the engine bay..worked well..kept temps down to about quarter on the guage.
http://www.ebay.com.au/itm/CAMEC-016...3D231435835615

you could also jet coat the manifold and dump pipe, inside and out
Keep the temp inside the pipe

Mine is the same as ET's, all wrapped up but it was still getting so hot under the bonnet, when I went to pump up my tyres, from the air pump under the bonnet, the thermal cutout kept kicking in after only about 10 mins....

I ended up putting in two marine vents on either side of the top of the bonnet....worked a treat and hasn't overheated since. (will put up a pic when I get home from site...)

XA Ford GT bonnet scoops might work ok
I dont think it legal to have rear facing hood scoops.
Cause if you break a hose your vision will be impaired

Quote:

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Originally Posted by threedogs

you could also jet coat the manifold and dump pipe, inside and out
Keep the temp inside the pipe

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Yes, definitely another option and why I was interested in Cuppa's recent playing around with ceramic coatings.

I do like the sound of those small marine type vents Gecko and am keen to see a pic of that.

Might try a combination of some of the above suggestions and see what happens. Better ventilation seems key, then keeping the heat down and out the exhaust too.

Hotrods have small 9" fans to draw heat out of the engine bay but where you put them i have not idea.
How do you or why do you think you have heat block

Geck and wa are the best ideas IMHO... help the air travelling thru get out and also stop any stratification IE a layer of really hot air up against the bonnet more so than try and force more air in.
As prev mentioned, raising the rear of the bonnet on the hinge adjstments or mounts is another but looks a bit poo IMHO

I was forever this problem with my 350 chev 75s Troopy, after jet coating my blockhuggers inside and out
lifting the back of my bonnet,Plus installing two GU bonnets scoops , and countless radiator up grades, I figured it out ,
Faulty VDO temp guage.lol brand new too,
I drove home from the Murray in 45 degree heat sitting on 110kph and with the new gauge temp was spot on the whole time
Just spewing it cost me so much searching for solutions

Quote:

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Originally Posted by FNQGU

I have the same exhaust wrap from Brunswick Diesels, but no thermo cover (blanket) on the turbo. I might look at doing that.

When you say raise the rear of the bonnet, do you mean simply putting a couple of washers or spacers underneath the bonnet hinge bolts to raise it up a fraction to let air out the back edge of the bonnet?

@Kevin07 - are you referring to one of the ARE bonnet scoops or similar? And this lowered your general engine bay temps by 50 degrees? That sounds like a worthwhile modification if that is the case.

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sorry that's egts but I suppose the engine bay would have been cooler as well how much nfi

Here are the marine vents that I cut into the bonnet. Has worked a treat. There are different styles but I went with these.


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