Overheating at High Speed (revs) and uphill

[Aninoninoni]

Honda Civic LXi 1996 (stock)
Went to baguio last July 2009 jampacked ang auto ko with 4 passengers and luggage at compartment, nag start magover heat mid way up marcos highway. Nung pauwi din uminit kahit madaling araw kami umalis. pero before that wala naman overheating. Nag change oil lang, nawala yung over heating. Question: sa lumang auto ba regular oil na lang ang dapat bang gamitin? and, may relation ba ang di pag change oil sa overheating. nakakaka 5000k na ako since my last oil change, last week hinataw ko sa skyway 140kmph nagsimula na naman uminit (a little more than 3/4 the gauge) pero pag trafik, bumabalik sa normal.... confusing!!!! di nababawasan ng tubig sa radiator, tumatakbo mga fan, walang tagas water pump. Possible causes? Salamat.

[meledson]

Honda Civic LXi 1996 (stock)
Went to baguio last July 2009 jampacked ang auto ko with 4 passengers and luggage at compartment, nag start magover heat mid way up marcos highway. Nung pauwi din uminit kahit madaling araw kami umalis. pero before that wala naman overheating. Nag change oil lang, nawala yung over heating. Question: sa lumang auto ba regular oil na lang ang dapat bang gamitin? and, may relation ba ang di pag change oil sa overheating. nakakaka 5000k na ako since my last oil change, last week hinataw ko sa skyway 140kmph nagsimula na naman uminit (a little more than 3/4 the gauge) pero pag trafik, bumabalik sa normal.... confusing!!!! di nababawasan ng tubig sa radiator, tumatakbo mga fan, walang tagas water pump. Possible causes? Salamat.

Possible na hindi na efficient ang cooling system.

Possible na mahina ang water pump o barado ang radiator o ang iba pang daluyan ng tubig.

Kung gagamit ka ng coolant pero originally, pure tubig lang ang gamit, baka lalong magbara.

Ok pa rin ba ang mga hoses mo? baka sobrang lambot na.

Bago mag summer, ipa check mo na.

[tanatej]

Check mo uli aux fan lalo na kung naka automatic at thermostat.

[miked]

1. automatic tranny ka ba boss o manual? nabanggit mo bumababa sa normal pag traffic, therefore gumagana pa clutch fan. kasi kung mabilis na sasakyan ung convection na ng hangin ang gumagawa ng heat exchange at free wheeling na lang ung fan. saka ulit gagana yung fan pagdating sa stop and go traffic o kaya e slow speeds.
2. with regards to my question sa tranny, if ever automatic tranny lalu na kung internal cooler ang tranny e ipalinis mo radiator at change atf. if manual, subukan ipalinis ang radiator.
3. pwede ring pudpod ang water pump kahit walang leaks gaya ng nabanggit mo.
eto muna ha.

[beetlebmble]

hi to all, my first post as a new member here-
Similar po experience with my sentra ss97 AT- revving at speed

history po ng car
2006 - water pump broke running for 3 days w/o water sa radiator _almost_30km rn tinakbo, gamit kasi ng sister hehehe-

nagpalit lng , ok na uli running with normal temp even kahit long distance

Oct 2009 - sister drives from fairview all the way to our house with busted heater hose assembly from engine _ yung hose kinain na rn ng corrossion ng assembly. She drove then shuts down the engine if malapit na mag 3/4 ang temp. Fix the assembly and it's ok again.

Jan 2010 ok naman performance (no overheating)but with some power loss and short shifting na ang transmission, upshift cya agad if kahit na revving hard unlike before
so I adjusted na idling speed , dati naka 700 rpm A/C off, manual says 800
rpm so set to that speed was my first sol'n. Now its temp goes up to above 1/2 if revving then ok na uli pag cruising 80 kph. Seems me tama na head gasket from what the posts about overheating say or somewhere else cooling system. it's ok if set to 700 rpm uli pero mahina pickup compared ng Hindi nagkaproblem. some advice po, top overhaul ? no leaks , me tama konti ang rad cap (even before the problem)pero minimal loss of water if driving
with high temp.

[beetlebmble]

I hope head gasket is still ok yet I will resort to top overhaul before getting a cracked aluminum head. maybe sa engine troubleshooting dpat Ito ipost hehehe , dami na rin kalawang cgru ( I was not able to drain coolant from the engine block) nito because last time change coolant April 2009 , 30/70 ang ratio ng rust to water/coolant pipit pati mga radiator hoses me lagitnit na. I noticed also that after a Long drive more than 60 km, I will adjust again idling speed for nag aadjust ata Ecu to lower performance to reduce possible engine failure.

[bakamaka2long]

Try nyu po tignan mga sir kung pgnaka aircon lang ba sya ngooverheat or pg Hindi nakaaircon.. Obserbahan nyu ung mga fan kung umaadar ba sya kahit Hindi nakaaircon.. Sa kaso naman ng nwawala and lamig malamang ngyelo na and coil sa lamig.. Maraming kaso kaya ganun minsan madumi n kailangan n linisin minsan di ngootomatik kahit sobrang lamig na.

[gutz_3110]

Try nyu po tignan mga sir kung pgnaka aircon lang ba sya ngooverheat or pg Hindi nakaaircon.. Obserbahan nyu ung mga fan kung umaadar ba sya kahit Hindi nakaaircon.. Sa kaso naman ng nwawala and lamig malamang ngyelo na and coil sa lamig.. Maraming kaso kaya ganun minsan madumi n kailangan n linisin minsan di ngootomatik kahit sobrang lamig na.

hi bro,
ang napansin ko lang while driving along sctex
1. uminit na ang buga ng AC while driving around 140-160 approx kaya...
2. tumingin ako sa instrument panel, tumaas na temperature at nasa 2 o'clock na.
3. sinara ko AC at binaba ko speed sa 80kph, ayun, bumalik na needle sa gitna

yun tubig sa radiator mukhang tama lang yun nabawas kasi nasa 150-160kph ang byahe ko. nung pabalik ako, maski gabi at may ambon, ganun na naman. tumaas ng bahagya ang temp pero binagalan ko. ngayon city driving ulit, normal naman maski sa traffic.

[JohnM]

Umiinit kasi ang makina at high speeds and high revs. On highway driving next to useless na ang fans dahil sa bilis ng daloy ng hangin sa radiator.

One of the possible causes of overheating at high speed ay barado ang fins or barado ang cooling tubes sa loob ng radiator. There is not enough coolant circulating the system. In other words di makahabol ang radiator sa pagpalamig ng coolant dahil onti na lang ang umiikot.

When the vehicle slows down bababa din ang revs so the radiator does not have to deal with as much heat as before. Kaya na nya kahit barado so your temp goes down.

[gutz_3110]

hi johnm,

do you suggest to have the radiator checked first? naglagay ako ng coolant last month nung nagpalit ako ng timing belt.