Overheating at High Speed (revs) and uphill

[shok]

Kapag nagbabawas ng tubig ibig sabihin may leak.
Kung maliit lang ang butas, medyo mahirap hanapin pero ang symptom nito nauubos over time yung coolant muna sa reservoir and then sa radiator.
It takes weeks bago mo mapansin but tataas na dahan dahan ang temp nyan kung hindi napunuan ng coolant.
Kung puno ang reserve at walang laman ang radiator, rad cap naman yan.

It has happened to me before, after two weeks kailangan ko magtop up palagi.
Ang source pala ng leak ay yung aluminum fitting kung saan kinakabit yung lower radiator hose papunta sa engine block.
Corroded na kaya may pin hole leak. Matagal ko din hinanap at nakita lang nung papalitan ko na yung lower rad hose. Kinalas ko yung fitting para malinis ng steel brush bago palitan ng bagong hose at ayun, lumitaw yung pin hole.

Ang mahirap sa mga pin holes, nageevaporate yung tubig kasi mahina lang ang tagas kaya walang bakas minsan.

[jeDi13]

thanks sa info mga sir. palitan ko na rin rad cap since nabanggit niyo na rin. idamay ko na rin yung hoses. though hindi siya nagbabawas over time, pero matagal na rin kasi. baka makunat na and due for replacement na rin.

by the way, dapat ba OEM ang rad cap and hoses na bibilhin? ma-ssubject kasi sa high pressure kaya dapat matibay talaga diba? or puwede na yung replacement parts?

[JohnM]

I suggest OEM. Di naman ganun kamahal. Sakto ang fit ng hose and tama ang rating ng cap. Bring sample if able though.

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[jeDi13]

thanks JohnM. I remembered when a hose on my father's sentra had a hole, I had to replace it in a gasoline station and there was no exact fit, the mechanic had to cut an available high pressure hose. so far, still works. the car was even driven to Bicol without overheating.

[gutz_3110]

JohnM,

i ended up replacing the radiator top to copper tapos pinalitan din yun cap + overhaul (all for P2.8k). ang sabi kasi nung gumagawa, pwede pa yun radiator pati fins, wala naman daw tulo. yun plastic top kasi may crack na, baka dun tumatagas yun tubig kaya nauubos. hindi ko pa sya ulit namamaneho ng malayo at high speed and high revs. hopefully maayos na yun problem ko. as of today, mas mababa ng isang guhit ang temp.

[JohnM]

Yep yan ang risk ng rad overhaul. Malamang brittle na ang plastic at nabibiyak pagtanggal. Use coolant to prevent rust from forming again ;)

[gutz_3110]

yup brittle na, pinakita sa akin, malulutong na yun gilid. saka barado na ng kalawang yun mga butas (yun ba ang fins?). buti na lang hindi ako umabot na sarado na lahat ng butas hahaha sabi ngman nung gumawa, tatagal naman daw yun kesa gumamit ako ng replacement na mura, madali lang daw masira.

[JohnM]

May mahabang thread dito somewhere about replacement radiators regarding metal incompatibility and efficiency. Interesting read to say the least.

Ihataw na yan para matesting

[gutz_3110]

sige bro JohnM, search ko nga yan thread na yan hehehe salamat sa mga inputs. laking tulong.

[jeDi13]

nice, hopefully yan na ang kasagutas sa problema mo hehe.. I would say 2.8K is just about right. I previously asked for a conversion (plastic top to copper) cost and it was around 2K. 800 for the top and bottom overhaul price is also fair enough.

btw, kelan ba last time na nagpalinis ka ng radiator? never pa?