Overheating?

[Maximo74]

yes, wag naman sana. pero iyan ang siguradong tinatamaan kapag nag-overheat(worst with engine stalled), hindi mo makikita or malalaman until baklasin mo sya.
extreme overheat= expect major problems.

pero wala nman ako iba nararamdaman, same drive pa rin. 1 month ko na gamit manila - cavite. same issue lang - overflow sa reservoir tank at drain radiator. half yung temp gauge. binalik ko sa dasma power tech para sa compression test kaso not satisfied sa tools nila, isang spark plug socket lang tried nila - reading below 1bar, sabi agad me tama CH gasket. e sila yung tumaga sa akin ng 11k palit thermostat at waterpump na parang alam ko na hindi yun ang sira. dinala ko d2 sa me romualdez st. d2 sa me UN ave. SCAG automotives( pangmayaman yata na dun kse puro mustangs, Nissan grt, at benz nakaparada dun, hehe ), pressure test nila radiator, ang result meron daw leak, hindi sila mkapag-compression test at any diagnostic test until magawa or mapalitan radiator. cost me 1k para sa press test ng rad..

[Maximo74]

check your aux fan, po. it might be under-rotating.
it rotates and pushes air thru just enough, to make one think it is functioning fine. but in truth, it is not pushing enough air thru.
if you can get a new fan and compare the volume of air...

ok naman sir yun aux fans, inayos din nila sa powertek dasma.

[Maximo74]

Same thing happened to my previous Xtrail. Nag halo yung tubig & langis. Nag kulay cappuccino. Cost me around P50k for the top overhaul.

sir wala sign ng oil/water mix up. check ko yung sockets ng spark plug walang sign na basa. yung coolant reservoir malinis, redcap wala rin sign ng oil. takip ng engine wala rin ibang mixture or signs na kakaiba.

[Janemar]

Dalawa lang cause nito. Either sira rad cap, excess pressure sa rad ay sinusuka sa expansion tank kaya napupuno dahil malambot spring.

OR

Buo rad cap pero talagang nag oover pressurise lang talaga ang cooling system kaya tumatapon lahat sa expansion tank.

Cause ng overpressure,

1. Singaw/warped head gasket:
1.1 Singaw inbetween cooling water jacket and combustion chamber.
1.2 Singaw in between oil gallery and cooling system(a.k.a Sharon Cuneta/tubig at langis/milo/ovaltine.)
1.3 Comy of 1.1 & 1.2

2. Cracked head
2.1 Exhaust gasses escaping thru cooling system.
2.2 Combustion chamber gasses escaping thru cooling system
2.3 comby of 2.1 & 2.2

3. Overheat.

[Maximo74]

Dalawa lang cause nito. Either sira rad cap, excess pressure sa rad ay sinusuka sa expansion tank kaya napupuno dahil malambot spring.

OR

Buo rad cap pero talagang nag oover pressurise lang talaga ang cooling system kaya tumatapon lahat sa expansion tank.

Cause ng overpressure,

1. Singaw/warped head gasket:
1.1 Singaw inbetween cooling water jacket and combustion chamber.
1.2 Singaw in between oil gallery and cooling system(a.k.a Sharon Cuneta/tubig at langis/milo/ovaltine.)
1.3 Comy of 1.1 & 1.2

2. Cracked head
2.1 Exhaust gasses escaping thru cooling system.
2.2 Combustion chamber gasses escaping thru cooling system
2.3 comby of 2.1 & 2.2

3. Overheat.

Sir malalaman ba kung problema sa CH or CH Gasket thru compression test? If that's the case engine overhaul na po yun?

[Janemar]

Sir malalaman ba kung problema sa CH or CH Gasket thru compression test? If that's the case engine overhaul na po yun?

Di accurate compression test. Mas accurate leak down test.

Pasakan ng compressed air ung spark plug hole at TDC for all cylinders. Makita mo bubula tubig sa radiator nyan.

Top overhaul lang, kalahating araw lang yan pag kabisado ng mechanic oto mo at kunpleto ka na gamit pag dating sa shop nya.

[dr. d]

ok naman sir yun aux fans, inayos din nila sa powertek dasma.

in my experience, "aux fans don't get fixed. they get replaced."
but if they say, you have a radiator leak, than that could indeed cause all the problems you have been experiencing.
good luck, po.

[miked]

DIY check mo lahat ng hoses, clamps at freeze plugs na kaya mong makita.

baka may malutong na na hose, matigas na upper radiator hose, napakalambot na lower radiator hose, maluwag na clamp, or tumatagas na freeze plug.....baka lang

makikita mo naman yung traces ng coolant.

pinalitan nga ba o tinanggal yung thermostat?

[jaypee10]

ibyahe mo at siguraduhin mong mainit ang makina saka mo itabi sa isang lugar.taas mo hood saka mo silipin kung may mga water leak.ung conversion kasi ng radiator minsan hindi maganda.ung pinaka sinasalpakan ng radiator cap.

dapat ung dating sukat ng radiator cap mo .ganun din ung sukat ng radiator copper top na nilagay sayo.tingnan mo mabuti.kung iba ang sukat ng radiator cap mo ngayon kaysa sa dati.na experience ko na yan.may sukat din kasi ang pressure ng radiator.depende sa sasakyan mo.pero malamang yang sayo iba na ung rad cap mo.

[sirkosero]

Sir malalaman ba kung problema sa CH or CH Gasket thru compression test? If that's the case engine overhaul na po yun?

Yes. Do both dry and wet compression test.

Sa dry testing, check mo kung pantay ang reading. Variance should be around <10% per cylinder. Record you readings.

Then do wet testing by squirting motor oil sa spark plug sockets. Kung gumanda ang reading (tumaas substantially), you have worn out piston rings. Need to do overhaul.

Kung mababa pa din reading after wet testing, you have sirang valve seals. Top overhaul.

Kung dalawang magkatabing cylinder magkaparehong mababa, you have warped cylinder head and/or head gasket. Top overhaul plus head shaving sa machine shop

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