very weird overheating problem...

[pleasing05]

Hello po. Magtatanong lang sana ko tungkol sa kakaibang overheating problem ng Toyota tamaraw fx ko (98 model, 1.8L 7K engine)
Naranasan ko sya lately, nagooverheat sya kapag sinubukan kong palagpasin ng 95KPH ang speed ng fx ko. Tapos hindi siya nagooverheat kapag normal city driving.
Ang nakakaasar pa dito, dati napapaabot ko itong FX ko ng 110KPH ng walang overheating problems.
Any ideas po ba?
Salamat po ng husto...

[4JGtootsie]

Check the following:
Oil and water level and rate of consumption.
Leaks on passages and galleries.
Oil and water pump.
Cylinder gasket condition if visible.

[russpogi]

Also check the auxiliary fan.

[OTEP]

Nung nangyari sa MB100 iyan, sira pala yung radiator cap and mabagal ang ikot ng engine fan. Bumili ako ng new cap (Php150.00) and pina-check yung fan.

Start from the basic (and less expensive) stuff first.

[wildthing]

ganyan din ang sintomas ng baradong radiator (you need to have it overhauled), non functioning auxiliar fan (possible wiring or motor ng aux fan problem) and yung malapit ng masira na water pump (some of the fins are probably broken na due to corrosion).

[dbuzz]

pa overhaul mo radiator mo!!! otherwise the best na yung palitan mo ng bagong radiator kung luma na yan mas matipid pa kasi ang kinalabasan kung papalitan mo na lang ng bago ang radiator kaysa ipahinang pagmay leak.


then pa check mo rin cooling fan

also check water pump baka gastado na.

pero higit sa lahat tingnan mo oil/oil level mo kung mabilis ang bawas o di kaya may halong tubig(chocolate kulay)nyan, eh handa ka na sa malaking gastusin sa pag pa overhaul(top overhaul) sa engine.

[Langabe]

Check mo yun cylinder head gasket kasi kung pagpatakbo mo siya ng 95kph tsaka siya nag overheat defenitely sobra lakas na ikot ng fan nyan.dahil yun fan nya nakakabit sa makina. kung palitan mo yun radiator mo cguro mas maganda kung pang c-190 na yun kabit mo 4 rows sya....

[emongedmund]

clogged radiator lang siguro yan.. nagyari na rin sakin yan.. nag ooverheat pero may tubig naman ang radiator hehehe

[mazingerZ]

Naranasan ko before naman, is that nakalimutan ng mekanikong ibalik ang radiator cap. I didnt bother checking na kasi, sabi nya ok na raw. Nagulat na lang ako umuusok na ang harapan ng kotse ko, di naman tumataas ang water temp gauge. Hehehe. Seriously, check mo radiator cap muna then reservoir, etc. .

[pleasing05]

Checked the following:
Oil level: normal at kaooil change lang po last month
water level: normal, kapapalit lang po ng radiator cap 3 months ago
hindi po makita condition ng gasket.
Will try na ipaoverhaul yung radiator. baka po kasi nag"semento" dahil deep well po ang ginagamit kong tubig.
salamat po sa tulong...

[trunks]

Boss pa check mo cylinder head gasket mo, baka palitin na. Ganyan nangyari sa MAzda ko noon, pag heavy traffic at normal driving lang hindi umiinit. Nung tumakbo ako sa Superhiway ng hataw, biglang dirediretso ang taas ng temperature. Ayun na-top overhaul.

[lancepower]

na experience ko na rin sa lancer ko yan culprit baradong radiator kaya pina overhaul ko after that ok na ulit car ko pero i think kailangan ko na rin mag invest para sa brand new na radiator kasi dalawang butas na yung di magawa as in barado na talaga

[calcite]

You can rule out radiator fan problem kung nago-overheat kapag mabilis ang takbo. The fans don't normally engage at high speeds since mabilis na ang dating ng hangin - enough to cool the radiator without the fan. In your case (7K) mayroong clutch ang fan and it disengages the fan at high vehicle speeds.

I would first check the radiator. Baka nga barado and not enough coolant is flowing through the radiator at high speeds. Specially since you are using deep well water. Suggestion lang, use distilled/purified water in order to avoid clogged radiators.

Since 7k iyan, check mo na rin ang water pump. Madali na iyan tanggalin specially if the radiator is already out (hindi na masikip). Inspect and replace if necessary.

And inspect the fan clutch while you are at it. Add silicone oil if needed. Mura lang ang 1-tube ng silicone oil. But you might need 2-3 tubes.

Ayan, dumami na tuloy ang gagawin.

And if the above doesn't work, mas marami ka na talagang gagawin.

[mbeige]

Will try na ipaoverhaul yung radiator. baka po kasi nag"semento" dahil deep well po ang ginagamit kong tubig.
salamat po sa tulong...

Definitely your radiator. The mineral deposits in hard water can accumulate and clog the radiator passages. Not only that, it can also clog your engine's water jackets - around the cylinders, the thermostat housing, water pump too perhaps, as well as all rubber hoses.

Have your entire cooling system flushed with citric acid (low dilute concentration) to get all the mineral deposits out. Flush it until the water that comes out is clean. Just be warned that this could loosen any stubborn deposits and can cause a spike in the temperature when something declogs.

When done, fill it with coolant/antifreeze and distilled or deionized water if you have access to either.

[red888]

sir,

san ba nakakabili ng citric acid ?

[reilley]

not weird really, normal yan sa bara bara na radiator, nangyari na sa akin yan. nagpa-overhaul ako ng radiator and whoa puro rust na and a few lines are dead(clogged) already. temp goes up when your engine exerts more effort, kaya during normal driving normal temp ka, kasi kaya pa nung radiator mo ang heat produce by your engine during these conditions BUT when you go faster or a continuous uphill climb water temp will rise. pa-overhaul mo sir, doon mo rin makikita kung may problems pa radiator mo, or the cooling sys itself.

[sequoia]

re distilled h2O for radiator.
may nabasa ako na not all distilled water are created equal, some are acidic (based on ph) yung popular brand daw sa atin nasa range ng Ph 5.+, isa lang daw ang brand na hindi acidic, hindi minention ang name pero stars with the letter V... daw. so piliin din yung hindi acidic. kung gagamitin sa radiator. Kung sino man tsikoteer na may access sa pang test (litmus paper kaya kaya?) paki verify. forgot where ko nabasa. once i remember post ko agad. but kung lagyan ng coolant baka ma offset na yung balance ng ph. di kaya?

[Elroi]

probably clogged radiator nga ang problem nyan..


re distilled water: low the ph content in water causes acidity.. the desirable PH content is from 7.2 to 14..
Distilled Water

[speedyfix]

most likely a clogged radiator. have it overhauled or replaced.

[wisecracker75]

Most likely a clogged radiator. I had the same problem last year. Nag pa "Top overhaul" pa ko. Nag overheat pa din :umm:. nung pina overhaul ko radiator ko. Di na nag overheat. Up to now di na ko nag ka problem sa overheating. Have your radiator overhauled first before anything else. most of the time yun ang cause nung overheating