4d56 overheating w/ A/C on on traffic

**miked** · May 4th, 2011 06:53 PM

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** · May 6th, 2011 09:51 PM

Originally Posted by 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.....

nice talking though, I presumed

**miked** · May 8th, 2011 11:58 AM

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** · May 8th, 2011 03:57 PM

Originally Posted by 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

I feel for you. Viscous fan kaya

or you can get some silicon oil first and refill muna para hindi namamadali makabili

**miked** · May 23rd, 2011 01:54 PM

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** · May 23rd, 2011 03:23 PM

^^ 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** · May 23rd, 2011 03:48 PM

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** · May 23rd, 2011 04:33 PM

Originally Posted by 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

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** · June 1st, 2013 01:50 AM

Originally Posted by dvldoc

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** · June 1st, 2013 06:56 PM

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.