If napapansin niyo mabilis maubos coolant/distilled than usual...

[radeon]

ung mga cases of nasisira ang thermostat ng optra dati is because of nauubusan ng coolant na di napapansin ng owner. di napapansin kasi wala namang leaking nakikita.

The culprit is this, the PLASTIC small tube na galing sa radiator which is connected by a hose that returns to the coolant reservoir!
if you are facing the hood, what i'm talking about is nasa top right ng radiator.
TUNAW na yan. ewan ko ba kung sinong hinayupak nag design niyan at plastic ang material when kainit-init ng liquids dito.

hindi mapapansin ng kaibigan ko to sa optra niya if di niya pinuno ng tubig. kasi naka ilang liters na siya ng add ng water di pa rin napupuno ang reservoir, laging pumupunta sa ilalim tapos maya2x ayun napuno ang radiator at doon na lumabas yung tubig sa maliit na hole dun sa taas ng radiator.

kaya mabilis maubos coolant kasi walang bumabalik sa coolant reservoir.

diniskartehan na lang ng mekaniko by looking for a small metal tube na kasya dun sa hose.
kumuha ng kunting sand to mix with epoxy para mas kumapit yung metal tube to the radiator. then ginamitan ng devcon para sigurado.

check niyo if plastic rin ang ganyan sa ibang chevy units like cruze etc.
if na check niyo na di pa tunaw ang plastic na yan, unahan niyo na kasi malaking problema yan later on if ang makina o thermostat pa madamay.

[desert fox]

pangit ba design? bakit kaya plastic lang ang material na ginamit?

[kutangbato]

nagtitipid ata ang chevrolet nowadays.

[raquino]

halos lahat ng material for the radiator like the top cover is made of plastic. kahit ano model or brand puro plastic na gamit. di naman basta basta natutunaw ito unless lagi mataas temp.

[oj88]

^ +1

The parts being made of plastic is not the issue. I think it's likely that the particular plastic used was substandard or is not designed for tropical weather. It may not be rated for extremely high temperatures typical of an engine's cooling system.

Most modern cars nowadays use a lot of plastic parts on the engine without any problems; radiator, valve cover, intake manifold, etc. These help to reduce the overall weight of the vehicle as well as to reduce manufacturing cost.

[Ry_Tower]

^ +1

The parts being made of plastic is not the issue. I think it's likely that the particular plastic used was substandard or is not designed for tropical weather. It may not be rated for extremely high temperatures typical of an engine's cooling system.

Most modern cars nowadays use a lot of plastic parts on the engine without any problems; radiator, valve cover, intake manifold, etc. These help to reduce the overall weight of the vehicle as well as to reduce manufacturing cost.

halos lahat ng material for the radiator like the top cover is made of plastic. kahit ano model or brand puro plastic na gamit. di naman basta basta natutunaw ito unless lagi mataas temp.

+1, hindi sa plastic problem niyan, sa maintenance ng coolant system as a whole.

[radeon]

tingnan niyo yung maliit na tube pag nasa harap kayo ng kotse.
do you think kakayanin ng maliit na tube na yan ang init sa tagal ng panahon?
kaya nga wala nang bumabalik na coolant o distilled water sa reservoir kasi dahan2x nang tinutunaw ng init. sabi ng kaibigan ko, the mechanic even inserted a screwdriver sa hose in order to clean it kasi yung dating plastic tube eh naging plastic particles na.

that small tube from the radiator is connected by a hose that is supposed to return to the coolant reservoir.

kung sa lack of maintenance sa coolant/distilled water on the part of the owner ang problema eh di di dapat natunaw yan kasi wala nang mainit na coolant o tubig na dadaan dyan para bumalik sa coolant reservoir.

tanggalin niyo muna kasi yung hose na connected sa radiator at coolant reservoir sa upper right pag kaharap niyo ang kotse para malaman niyo ano sinasabi ko at makikita niyo gaano kaliit ang tube na yan.

i'm only doing this to warn and help other people, kasi nakita ko na ano nangyari sa kaibigan ko.
small diskarteng pinoy kesa gumastos ka ng malaki if ang masira is thermostat o makina na mismo.
there's nothing wrong kung ma check niyo to kahit anong unit mapa chevy or etc.

[grahamtelly]

Pure distilled water runs cooler than 50/50 mixture of coolant and distilled water, Coolants are so overrated....