4d56 overheating w/ A/C on on traffic

[miked]

i was tinkering a while ago and a neighbor who loves to "kutingting" also came up and had a short talk....we discussed my problem and he told me to have the fan clutch welded to the shaft. he even advised to remove the thermostat...i was acting like i didn't know something about cars and you know what happened next. binangka na ang usapan...i'll never discuss car things with that guy again.....

[tip_tipid]

i was tinkering a while ago and a neighbor who loves to "kutingting" also came up and had a short talk....we discussed my problem and he told me to have the fan clutch welded to the shaft. he even advised to remove the thermostat...i was acting like i didn't know something about cars and you know what happened next. binangka na ang usapan...i'll never discuss car things with that guy again.....

nice talking though, I presumed

[miked]

looked around for a fan clutch here in my hometown.....mukhang di kilala ang fan clutch. ang sabi sa akin "yung transmission clutch?" (with matching pedal movement by the hand)....hayyyyy

[edtf]

looked around for a fan clutch here in my hometown.....mukhang di kilala ang fan clutch. ang sabi sa akin "yung transmission clutch?" (with matching pedal movement by the hand)....hayyyyy

I feel for you. Viscous fan kaya
or you can get some silicon oil first and refill muna para hindi namamadali makabili

[miked]

Greased my hands this weekend......

1. I retightened the headbolts and guess what.... they moved at 50 ft-lbs.....as per the manual, the rated torque is 88 ftlbs....I'm beginning to hate these torque tighten type of headbolts.

2. As I was putting back the rocker shaft-valve assy, 2 bolts holding down the rocker assy don't seem to tighten. I removed the bolts and cleaned the threads using a tap and die. Put them back and still the same. Problem even got worse and the threads were almost flat....took out the camshaft bearing cap #2 and #3 and metal shavings were on the camshaft (good thing i removed the caps). Bought the caps for P500 each.

3. Pulled down the fan-clutch assy and cleaned the bimetal coil with brake cleaner then a shot of WD40 on the pin holding the coil and confirmed its movement.....With my wife gunning her hair dryer on the metal coil, i rotated the fan.....for 5 minutes of heating the coil, clutch resistance don't seem to increase....Since the stores are closed and need to use the truck asap, I put it back with cross fingers.

Engine pulling power improved plus the engine runs crisper....Tested it on traffic with A/C on. Still climbs to 93C but doesn't seem to climb faster than before beyond 93C....

I've been chasing this overheating problem since the day I got this truck and I think I have one last enemy to attack: the fan clutch!....New Japanese replacement costs P3k plus!!!! I'll scout around the surplus shops for a clutch and I'll update you guys.

[phezthie]

^^ ok na surplus bro. kaya lang baka same din maging costing mo ng replacement. malayo ka kasi sa tambakan ng mga surplus dito sa metro manila kung wala dyan sa area mo...

[miked]

Actually, meron din dito surplusan. The good thing is pwede rin ako pumasok sa warehouse nila at mamili ng part na gusto ko. Pwede mo pa nga sakyan yung half-pajero sa loob ng warehouse.hehehe

[Ry_Tower]

Actually, meron din dito surplusan. The good thing is pwede rin ako pumasok sa warehouse nila at mamili ng part na gusto ko. Pwede mo pa nga sakyan yung half-pajero sa loob ng warehouse.hehehe

Good if puwede ka pa pumasok mismo para maghanap. Makakapili ka ng pinakamaayos like to cracks, dents or chips and not rusted yung metal parts if ever. Sipag ah.

[12vdc]

A very simple Tstat modification you can do is to drill it. We do it on a lot of the higher performance cars here in the states, lowers the temps of your car without loosing the function. Sometimes you can't get a stat with the range you want so you can just drill it.

^ Can i just remove the air-bleeder valve of the thermostat?

Im suspecting also a defect on the clutch so iL try to rebuild the clutch using this.

I need to check the weight of this oil, can somebody translate the jap characters.. hehe

[shelu]

sana ok na ang car mo. it couldnt be tstat. kasi kung tstat, mag over heat yan while on motion. actually, the function of the tstat is to trap heat in order for the engine to reach the normal operating temp as quick as possible. while others may not agree, our cars will function even better without the tstat as we are in the tropics. pampasadang jeep na halos hindi namamatay ang makina dahil sa palagiang gamit, tinatanggal talaga ang tstat. sobrang init kasi sa atin. regarding sa clutch fan, refilling it with silicon is most practical. mura lang naman yan, around 80 petot yata ang tube. kung talagang nagtitipid, lock mo nalang. sabay sa ikot ng crankshaft. my 2 cents.

[12vdc]

^ Had it replaced, im just observing na lang medyo malamig na panahon pero so far OK na. Another experienced gained, but i hate working on the van- very cramped.

Re thermostat, it has been discussed several times na, one reason kaya sila ang major pollutant sa lansangan.

[MrQ5]

sana ok na ang car mo. it couldnt be tstat. kasi kung tstat, mag over heat yan while on motion. actually, the function of the tstat is to trap heat in order for the engine to reach the normal operating temp as quick as possible. while others may not agree, our cars will function even better without the tstat as we are in the tropics. pampasadang jeep na halos hindi namamatay ang makina dahil sa palagiang gamit, tinatanggal talaga ang tstat. sobrang init kasi sa atin. regarding sa clutch fan, refilling it with silicon is most practical. mura lang naman yan, around 80 petot yata ang tube. kung talagang nagtitipid, lock mo nalang. sabay sa ikot ng crankshaft. my 2 cents.

kelangan bang i-trato na pampasaherong jeep ang everyday commuter naten?

kasi po sir kung tatanggaling naten t-stat baka sa short trip everyday commuter like a <12 km baka di na umabot lagi sa normal operating temp like a an innova.

kung pang racing racing mode ka na lagi high revving, doon lang po ako mag-agree modifying the t-stat.

[shelu]

i am trying to illustrate the effects of tstat on our engines. as i said, we are in the tropics. kahit walang tstat, we will hit the normal operating temp within 10 minutes. kung may winter sa pinas, we cant definitely reach the normal operating temp even in an hour without it. we will even need to preheat our cars thru electrical plugs in our homes. wala akong innova but by experience, yong delivery van ko dati na L300 na tinanggalan ko ng tstat, idle ng 5 mins, normal operating temp na.

[crazy_boy]

i am trying to illustrate the effects of tstat on our engines. as i said, we are in the tropics. kahit walang tstat, we will hit the normal operating temp within 10 minutes. kung may winter sa pinas, we cant definitely reach the normal operating temp even in an hour without it. we will even need to preheat our cars thru electrical plugs in our homes. wala akong innova but by experience, yong delivery van ko dati na L300 na tinanggalan ko ng tstat, idle ng 5 mins, normal operating temp na.

Pag wala kasing tsat, pag nag idle ka ng matagal, may chance na mag overheat cause yung water tuloy tuloy na yung ikot. So iinit siya eventually. Pag may tsat, may time pa na "lumamig" yung tubig.

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[12vdc]

i am trying to illustrate the effects of tstat on our engines. as i said, we are in the tropics. kahit walang tstat, we will hit the normal operating temp within 10 minutes. kung may winter sa pinas, we cant definitely reach the normal operating temp even in an hour without it. we will even need to preheat our cars thru electrical plugs in our homes. wala akong innova but by experience, yong delivery van ko dati na L300 na tinanggalan ko ng tstat, idle ng 5 mins, normal operating temp na.

May coolant ba yung L300 mo? Pag wala, madali talaga ang heat transfer pero kakalawangin naman makina at radiator mo.

You can't be sure na normal temp na since analog ang gauges ng L300. TStat starts to open at 82C and fully opens around 92C. Pag wala ka Tstat, chances are below 82C lang ang temp mo. For your engine to function properly, it must be around 89C(normal idling)-95C(heavy revving), yan ang trabaho ng Tstat maintain that temp.

Mas malamig ang EGT ng non-turbo compared sa CRDI at gasoline so mas matagal painitin. Sa modern efi enignes, babagsak emmission at performance ng engine mo kapag tinaggal ang Tstat. Isa sa sinusukat ng ecu ang engine coolant temp.

Ok lang tanggalin Tstat kung racing or laging WOT, eh hinid naman laging WOT ang Jeepneys at passenger vehicles..

Para din EGR yan, useful lang sa idling speed.

[shelu]

the reason na tinanggal ko ang tstat is, mag over heat pag may tstat. nong tinanggal na namin, di na nga nag over heat. sa obserbasyon ko and i might be wrong with this, ito ay dahil walang bara at tuloy tuloy ang ikot ng tubig. mainit ang 4d56, madali mag over heat at pag nag overheat, warp kaagad ang c.head. kaya kadalasan ng L300 na delivery van, sa alam ko, tinanggalan ng tstat.

[miked]

the reason na tinanggal ko ang tstat is, mag over heat pag may tstat. nong tinanggal na namin, di na nga nag over heat. sa obserbasyon ko and i might be wrong with this, ito ay dahil walang bara at tuloy tuloy ang ikot ng tubig. mainit ang 4d56, madali mag over heat at pag nag overheat, warp kaagad ang c.head. kaya kadalasan ng L300 na delivery van, sa alam ko, tinanggalan ng tstat.

the never ending story of thermostat nga ano.....now, answer this. bakit yung pickup ko na turbodiesel (no intercooler) nasolve ko yung "rising temperature on stop and go traffic or stand still" nya nung nilagyan ko ng thermostat? at di na rin nagbabawas ng tubig after mainstall an ko ng thermostat.

in your case,palitin na talaga yung thermostat. the thermostat is a replaceable item. not a repairable or removable item. mas silent pa sa ngayon yung diesel ko kesa nung walang thermostat.

plus, bakit nilagay yang thermostat na yan ng mga nagdisenyo at gumawa ng mga makina? sasakyang pang pilipinas man o hinde.

tanggalin mo thermostat, magoovercool yan on most cases. and what do diesels need to be able to attain good combustion? HEAT is the answer. the thermostat is there to regulate or maintain the operating temperature. be it gas or diesel. mainit lahat ng engines. hindi lang 4d56. some newly designed engines also operate on higher temperatures for greater heat transfer than what we have now.

[miked]

kaya kadalasan ng L300 na delivery van, sa alam ko, tinanggalan ng tstat.

istorya lang yan ni manong sa kanto. huwag kang magpapaniwala. peace out brader! hehe.....if you want to prolong your fleet, install an mo ng thermostat. sa casa ka na bumili. mas sulit kesa yung murang nabibili sa auto supply.

in my case, may extra thermostat pa nga na nakalagay sa glove box ng pipip ko just in case.

[A121]

try checking kung "maluwag" na yung ikot ng radiator fan. sa adventure na ginagamit ko, medyo maluwag na kaya they repaired and put new silicon oil.

[nptolentino]

Sa akin lang parehas, wag i bypass ang thermostat, kasi hindi ma maintain ang operating temperature ng makina. Kung nag ooverheat, hindi kasalanan ng thermostat.