Overheat

[jick.cejoco]

newbie here, ill be needing your help masters

my nissan sentra 94 ex saloon, pag nadrive ko na siya ng mga around 4hrs with aircon, temperature ng oto lumalagpas na sa kalahati eh, kaya ang gagawin ko is ipapahinga yung oto, for about 30mins, after that ok na ulit temper niya, tingin niyo guys ano kaya prob ng oto?? somebody help po.. normal ba yun sa cars? na tumaas ang temper pag almost 4hrs driving na?





im not so familiar on how forums starter here.. kung mali po yung pag post po, please correct me, salamat po ng marami, godspeed tsikot.com

you are just being careful not to have your car sustain damage. it is normal for the temperature gauge to go higher than midway as long as it is not in overhear range. besides, your airconditioner should automatically get disabled once the engine temperature is high. your gauge is not that precise and it might not be showing the real temperature inside the engine. to have peace of mind, have a real time temperature readout when the gauge hits the level that you feel is too hot with an infra red thermometer at the thermostat housing

[Tj_abs]

Bossing hindi po normal yan. Kindly check your radiator kung nauubusan ng tubig. There are many factors why your car overheat like Pede my leak radiator(butas)sira aux fan, my leak hose, sira thermostat, barado radiator, nag leak radiator cap. Check mo din ung tubig baka kung malinaw pa or color kalawang. Hope this help. Good luck

[allier022407]

Boss pano po malalaman kung sira thermostat.. ok naman po yiung flow ng tubig sa radiator. Yung aux fan po pinaayos ko na.. makakatulong po ba pag ina overhaul ko yung radiator ko???

Pag kakabukas ko lng ng makina tahimik lang tunog niya pero after ng mga 20 mins umiingay xa parang may takatakatak na tunog sa makina

[zap.FREEDOM]

Boss pano po malalaman kung sira thermostat.. ok naman po yiung flow ng tubig sa radiator. Yung aux fan po pinaayos ko na.. makakatulong po ba pag ina overhaul ko yung radiator ko???

Pag kakabukas ko lng ng makina tahimik lang tunog niya pero after ng mga 20 mins umiingay xa parang may takatakatak na tunog sa makina

yah, radiator overhaul may do the trick, it will help clean the entire water channels and help removes rust and hard deposits, cheap price lang naman ang magpa-overhaul (around 600 - 1000php. afaik) comparing to get a new radiator, yung van namin ganyan din problema, the temp needle goes more than halfway though di pa naman overheat yung tipong mabilis lang umakyat agad yung temp. , nung-pinaoverhaul namin ayun, steady na lang lagi sa gitna di na siya lumalagpas ng kalahati.

[EVO-V]

Compared to an engine overhaul a radiator is cheap. This advocacy for "radiator overhaul" can only go so far as being a band aid solution.

Flush your cooling loop.

That "takatak" sound has numerous causes. Valve tappets being one of them, and given your car's age, your timing chain may have more slack in them than they should.

[miko101130]

kung nag aircon ka at saka lang overheat,
check
speed and operation of auxiliary fan... (depende sa nakakabit sa inyo, pwedeng 2 step motor yan na pag nag aircon ka bibilis lalo ikot,...
if walang tabas o machining na ginawa sa head mo during the overhaul dapat wala nang overheat yan sir...
pag bumawas kasi sa head mo by machining increase onti temp reading nang engine...

dapat sir, magaling ang aircon shop na pinagdadalan nyo para less expense at hindi hit and miss...

[allier022407]

Compared to an engine overhaul a radiator is cheap. This advocacy for "radiator overhaul" can only go so far as being a band aid solution.

Flush your cooling loop.

That "takatak" sound has numerous causes. Valve tappets being one of them, and given your car's age, your timing chain may have more slack in them than they should.

thank you so much for your response sir, but that "takatak sound" is bad ba? or its normal due to my cars age?

[allier022407]

kung nag aircon ka at saka lang overheat,
check
speed and operation of auxiliary fan... (depende sa nakakabit sa inyo, pwedeng 2 step motor yan na pag nag aircon ka bibilis lalo ikot,...
if walang tabas o machining na ginawa sa head mo during the overhaul dapat wala nang overheat yan sir...
pag bumawas kasi sa head mo by machining increase onti temp reading nang engine...

dapat sir, magaling ang aircon shop na pinagdadalan nyo para less expense at hindi hit and miss...

thanks boss, i got my aux fan fixed, ang pinagawa ko na lng is automatic on na yung dalawang fan pagkalagay pa lang ng key,

[allier022407]

thank you mga boss, yout responses really help me a lot, i got my aux fan fixed last saturday and drove my car, no overheat na! nice driving, ang pinagawa ko po sa electrician is once key ignition pa lang start na yung ikot ng dalawang fan.. thank you much mga paps!!

[miko101130]

thank you mga boss, yout responses really help me a lot, i got my aux fan fixed last saturday and drove my car, no overheat na! nice driving, ang pinagawa ko po sa electrician is once key ignition pa lang start na yung ikot ng dalawang fan.. thank you much mga paps!!

siguraduhin mo lang sir na properly wired po yung aux fan... with the correct wire gauge of both negative and positive lines, para peace of mind and no risk of any sorts.. hehe

[EVO-V]

Ideally those fans should be temperature controlled.

If your engine becomes too "cold" it will affect its fuel economy. There's a temperature sweet spot for all internal combustion engines.

[CVT]

Aux fan,-

Thermostat - baka hindi na bumubuka... Normally, closed iyan on start.
Water pump - ano ba iyan? Mechanical or electrical?

A few moments after starting,- dapat nagsi-circulate ang water/coolant sa radiator,- you can observe this by removing the radiator cap....

16.8K:laundry:

[allier022407]

Aux fan,-

Thermostat - baka hindi na bumubuka... Normally, closed iyan on start.
Water pump - ano ba iyan? Mechanical or electrical?

A few moments after starting,- dapat nagsi-circulate ang water/coolant sa radiator,- you can observe this by removing the radiator cap....

16.8K:laundry:

boss tanong lang, pag pure water ba nakakaoverheat xa? dapat ba talaga may halong coolant? ok lang ba yun na water + coolant?

and sa radiator pag tinanggal ko yung cap bubulwak yung tubig, dapat ba hindi yun bubulwak?

[EVO-V]

If it overheats with water it will overheat more with coolant.

Glycol-based coolants will increase the boiling point of water but reduce its thermal conductivity. This prevents your coolant from evaporating quickly.

Having coolant in place protects your engine and radiator from corrosion and acts as a bacticide against organic growth.

A 30% coolant mix is highly recommended.

[allier022407]

Ideally those fans should be temperature controlled.

If your engine becomes too "cold" it will affect its fuel economy. There's a temperature sweet spot for all internal combustion engines.

natakot ako dun boss, makakasama din pala yun, am just avoiding overheat but having a cold engine can consume more fuel? am i right?

[allier022407]

If it overheats with water it will overheat more with coolant.

Glycol-based coolants will increase the boiling point of water but reduce its thermal conductivity. This prevents your coolant from evaporating quickly.

Having coolant in place protects your engine and radiator from corrosion and acts as a bacticide against organic growth.

A 30% coolant mix is highly recommended.

ohhh now i know, thanks for that info sir, it will help me a lot. what brand of coolant should i buy? can you refer one?

[allier022407]

before kasi hiniram ng uncle ko yung oto ko, di ko din alam kung bkit di niya chineck before driving yung oil level, kasi ako before magdrive im checking all of those such as water, brake fluid, powersteering fluid,oil etc, unfortunately my uncle didnt notice na below level na yung oil ko, 4 days nasa kanya yung oto, and pagkabalik niya sakin pagkacheck ko ng oil, ubos yung langis as in simot, i got very nervous, kasi akala ko wasak na makina ko, yun pala sira oil filter ko, pero naibyahe naiya pa yung oto from pasig to sm fairview without oil, after that may "takatakatak" na sound na ako nririnig pag mga higit 1 hr of driving na ako.. ibig sabihin ba nun sira na makina ko?

[yapoy86]

baka may nasira na con rod bearing

[miko101130]

Ideally those fans should be temperature controlled.

If your engine becomes too "cold" it will affect its fuel economy. There's a temperature sweet spot for all internal combustion engines.

kahit na hindi temperature controlled and aux fan.... a gasoline engine will still reach its operating temp
( no amount of fan can keep the engine cold)...
the aux fan here will only aid in pushing cold air through the condenser so that the radiator can still dissipate heat and not lead to overheating... as what TS(board starter) experienced...

as long as a thermostat is installed in a vehicle the "change in fuel economy of a car due to an added auxiliary fan will be miniscule"..

[EVO-V]

There are warm up cycles that engines have to go through. The longer the amount of time you spend warming up the more fuel you consume.

On cold days and long idles (supposing you're in Baguio) you would need less thermal rejection to keep your engine running swimmingly.

Also those fans can draw anything form 10A to 30A. Calculate the amount of power you use and that will translate to fuel consumption.

Add the fact that the wear and tear of high draw electric motors will have on your battery.

Costs will, however miniscule they can be -incrementally accrue.