Fact or Fiction

[Rediesel]

Motoring Tip of the Week
More timely tips for our motorists regarding driving through flooded streets as we find ourselves in the midst of the rainy season and with the Metro streets prone to flooding, sometimes even after a short but heavy downpour.

Always maintain a high RPM while driving through floods to keep the water from entering the engine through the exhaust system. When you let go of your accelerator pedal and lower your engine’s RPM, water would almost surely be sucked in through the exhaust pipes and on to the manifold and straight to your engine. And this would cause your engine to cease and for your vehicle to stall.

When driving through floods — keep your RPM up.

I just can't fathom how water would creep up to the engine via the muffler when the engine is running. I just don't make sense.

I've tried it before while I was still in the Phil let the engine idle (diesel) while muffler was completely submerged in flood the engine did not stall. Narely a hiccup.

[Karding]

para mas succeptible pa sa hydrolock kung hihger RPM dahil baka mahigop through the intake. grabe, aakayat sa exhaust manifold ang tubig? I can see it happen when the water is as high as the valve cover

I could be wrong.

[raine]

Maybe kailangan lang na high rpm para malakas ang force ng hangin palabas ng tambutso kasi baka natatakpan na ito ng tubig, to prevent mamatay ang makina kasi hindi makalabas ang exhaust gas, pero yung papasok ang tubig sa makina parang hindi kasi mataas ang makina, subrang taasn na ng baha noon pagnagkataaon.

[oldblue]

hmmm... both arguments got points.

Faction na yan.

[j_avonni]

Maybe kailangan lang na high rpm para malakas ang force ng hangin palabas ng tambutso kasi baka natatakpan na ito ng tubig, to prevent mamatay ang makina kasi hindi makalabas ang exhaust gas, pero yung papasok ang tubig sa makina parang hindi kasi mataas ang makina, subrang taasn na ng baha noon pagnagkataaon.

This is the reason why.

[Karding]

Maybe kailangan lang na high rpm para malakas ang force ng hangin palabas ng tambutso kasi baka natatakpan na ito ng tubig, to prevent mamatay ang makina kasi hindi makalabas ang exhaust gas, pero yung papasok ang tubig sa makina parang hindi kasi mataas ang makina, subrang taasn na ng baha noon pagnagkataaon.

ahhh, ayun naman pala.

[alwayz_yummy]

kaya ko, pag baha, 4L then 2 or o/d off....

[ARB]

4L? sa cemented or asphalt? paano kung liliko ka? hindi nga masisira engine mo drivetrain naman.

[FrankDrebin]

4L? sa cemented or asphalt? paano kung liliko ka? hindi nga masisira engine mo drivetrain naman.

Hehehe. Yun nga ang iniisip ko. Malaking gastos ya'an.

[alwayz_yummy]

4L? sa cemented or asphalt? paano kung liliko ka? hindi nga masisira engine mo drivetrain naman.

4L kung leg to waist deep water (mga 5'7 ako). done it sa delica 4wd matic ko, (2inch lift and shortened air intake), and make sure ko na walang maarteng SUV na nasa harap ko....hirap mabitin sa gitna ng flood, di ba? pero stand-by ako sa brakes ko if suddenly may tumawid na stupid pedestrian...

dito sa liteace, di pa, kasi di pa ko tapos magpatch-up ng floor holes....

and manual hub tong liteace ko,e...auto-free ung dating delica ko...

kung bababa sa knee, i dont shift to 4L, kasi yan nga ang prob nyan....ung "binding" ba na yan...

[RedHorse]

yup, sa 4x4 multi-cab ng brother ko, nakatawid siya sa malalim na part ng kabankalan, yong isang 4x2 na multi-cab,tinangay ng baha...

[OTEP]

The Pajero can idle while 'parked' sa ilog (lubog exhaust). I don't see why flood waters can be any different.

[alwayz_yummy]

ang pagkakaiba lang ng flood waters kaysa sa ilog ay ung lumulutang na basura....

[mazdamazda]

M-Y-T-H!

Here's our Tsikoteer mythbuster at work:



AFAIK - more than 5 hours naka idle lang ang engine while the exhaust is submerged in water.

===

To note also, in order to maintain that "high rpm level", you need to use your clutch.

And using your clutch when crossing floods / water should be avoided as much as possible!!!

The engine at idle already has enough pressure to keep water out of the exhaust.

[alwayz_yummy]

ayan solve na...

diba pag pinuno mo ng tubig ung exhaust, then start mo ung engine, water will spill out...

ang mahirap lang kasi pag urban flood water treking is ung open manholes/hukay and stupid pedestrians/ "offerers" na tutulak ng ride mo pag nag-stall..

bakit mag-sstal, kasi ung pagbreak mo sa water, ung splahes na macreate mo, lumalaki lalo na pag bumibilis ka..

ko 4L kasi to maintain speed, and less brake-and-accelerating to maintain speed (L on 2 or 4H is usually, 20-30kph...e pag 4L L(5kph) 2(10-15kph) D-od/off(15-25kph) lang...slow trekking sa water, lalo na sa case ko na halos air-intake ko na, no snorkel)

matraffic sa flood is another thing,e... with all the floating debris around, lalo na ang plastics na ma-cau-caught mo afterwards...

idling high is not good for your engine and fuel consumption..

[wewoy_romero]

And using your clutch when crossing floods / water should be avoided as much as possible!!!

talaga? parang nabasa ko sa ibang thread to press the clutch. paki-verify naman mga sirs

[zero]

mga bossing,
bukod sa exhaust, mamamatay ba ang engine kapag nabasa/nabaha ang alternator?
yun kasi ang nasa lower part ng engine sa tulad kong naka-tsikot lang.
TIA!

[mazdamazda]

talaga? parang nabasa ko sa ibang thread to press the clutch. paki-verify naman mga sirs

from offroaders.com:

Watercrossing Driving Technique

* Take off seat belt and wind down window.
* Use low range 2nd gear (in most situations).
* Drive at a steady speed to create a bow wave.
* Avoid using the clutch.
* Do not over-rev engine if you lose traction.
* If engine stalls, place in neutral without using clutch to restart. Takeoff in 1st low.

[FrankDrebin]

talaga? parang nabasa ko sa ibang thread to press the clutch. paki-verify naman mga sirs

River/Flood Water Crossing Tips

[Helios]

River/Flood Water Crossing Tips

Long but informative read. Thanks. I read somewhere that this true fiction were actually applicable only to old/older vehicles.
History becomes a legend, and legend becomes a myth nowadays. Sigh. :sigh: