Bonnet scoops and creek crossings
Submitted: Wednesday, Oct 27, 2010 at 13:54
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OzTroopie
Hi all,
Many 4x4s have aftermarket/factory snorkels fitted to raise the height of air intake and increase 'safe' wading depth - which is still limited by height of diff breathers, electrics, battery, etc.
Have never owned a turbo car, just wondering how turbo 4x4s with a such as Patrol and Landcruiser 79 series with a bonnet scoop go during
creek crossings. Is it a matter of monitoring
water depth and keeping
water off the bonnet, or are there other precautions that need to be taken? Obviously there's some way the bonnet scoop handles driving through rain, but is there a limit to the amount of
water this system can handle?
Cheers,
OzTroopie
Reply By: TerraFirma - Wednesday, Oct 27, 2010 at 14:27
Wednesday, Oct 27, 2010 at 14:27
The bonnet scoops on late model turbo 4WD's are not for air intake and therefore not relevant to
creek crossings. They are air intakes for the Turbo's intercooler, simply to allow fresh cold air to assist in the Intercooling process. It is the engine air intakes you need to run via a
snorkel so you don't have the engine
drinking water and therefore hyrdaulic locking etc.
AnswerID:
434355
Follow Up By: Shaker - Wednesday, Oct 27, 2010 at 15:26
Wednesday, Oct 27, 2010 at 15:26
If you did take nice icy cold river
water through the scoop, it would probably give you a few more horsepower!
FollowupID:
705438
Follow Up By: OzTroopie - Wednesday, Oct 27, 2010 at 15:44
Wednesday, Oct 27, 2010 at 15:44
Thanks for the response guys,
So i take it no damage is caused through having
water run through the scoop and it simply drains off?
cheers
FollowupID:
705439
Follow Up By: TerraFirma - Wednesday, Oct 27, 2010 at 15:48
Wednesday, Oct 27, 2010 at 15:48
No otherwise you couldn't drive the vehicle through a carwash, wash your car with a hose or drive in the rain for that matter..! The air for the engine is sucked in via a duck via the air cleaner.
FollowupID:
705440
Follow Up By: Member - Tour Boy ( Bundy QLD) - Wednesday, Oct 27, 2010 at 15:49
Wednesday, Oct 27, 2010 at 15:49
I don't have a duck...couple of chooks maybe...lol
FollowupID:
705442
Follow Up By: TerraFirma - Wednesday, Oct 27, 2010 at 15:53
Wednesday, Oct 27, 2010 at 15:53
Turbo Intercooler Pic & Bonnet
This shows the turbo intercooler and the bonnet scoop, the air intake for the engine is not here.
FollowupID:
705443
Reply By: Rob! - Wednesday, Oct 27, 2010 at 15:53
Wednesday, Oct 27, 2010 at 15:53
As said above, the bonnet scoop is there to cool the turbo intercooler (radiator). So as with the other radiator, it is not an issue.
AnswerID:
434361
Reply By: Member - Vince M (NSW) - Wednesday, Oct 27, 2010 at 16:34
Wednesday, Oct 27, 2010 at 16:34
as the rest have said its not a problem if the scoop is for the intercooler
We have just got back from
Cape York & on one of the crossings its the first time I have watched the
water come over the bonnet & up to the windscreen & go down the scoop on our patrol just like pulling the plug in the bath its probably happened before but i have not noticed & showed there was plenty of void area under the bonnet
regards Vince
AnswerID:
434363
Follow Up By: KiwiAngler - Wednesday, Oct 27, 2010 at 19:31
Wednesday, Oct 27, 2010 at 19:31
So how was it crossing Nolan's then :-)))))))
FollowupID:
705464
Reply By: Going Bush - Thursday, Oct 28, 2010 at 20:05
Thursday, Oct 28, 2010 at 20:05
I'll put a Tarp over the front any car , not just intercooled ones, and not only to stop
water going into the engine bay 'like a bathtub' but mostly to stop the fan blades breaking or bending forward into the radiator. Also I dont think the cherry red hot turbo would take kindly to a instant ice bath, makes a mockery of turbo timers to cool them down before engine shutdown. the tarp keeps a nice air cavity in the engine bay so long as you keep up a bow wave.
AnswerID:
434448
Reply By: Member - Bill B1 (NSW) - Friday, Oct 29, 2010 at 00:12
Friday, Oct 29, 2010 at 00:12
Hi all,
If the intercooler can drain the rainwater, then why am I hearing stories about the new V8 LC's having starter motor problems when the rain comes in the bonnet scoop?
Maybe I didn't hear the complete story but it did have something to do with the rain and the scoop.
Cheers
Bill
AnswerID:
434480