4D56 Overheating

[NightRock]

Any suggestion to solve this problem, Im not sure if the piston was been oversize before.. Cylinder head was changed and top ovehauled also done, Probem is During High Rev * speed of 120km/hr temperature increasing, Im thinking of adding additional Fan but where to put it,

It also overheat during trapik if the AC is on but up to 50% gauge reading, I have done routine radiator cleaning.


Suggestion Please.!!!!!

[afrasay]

before nag change ng head nag overheat ba ito? re-adjust valve tappets.

[Djerms]

I'm thinking of adding an additional fan too. 4d56 din po. Hope to hear suggestions where to put it and shops that can do this.

Nightrock,
Try to remember kung nag-ooverheat siya before the overhaul. Medyo hindi yata typical na mag-overheat at high speeds. Yung sa traffic pwede pa. I experience this all the time. Well, not exactly overheating but rising temp talaga.

[jackaroo]

NightRock

Have you changed the water pump and thermostat? Old pump may not have enough water flowing. If no thermo, water can flow too fast with insufficient time to cool in radiator.

Also check the clutch fan- may be too soft due to old silicon oil, just replace silicon oil inside clutch fan.

[vinj]

I'd go with what Jackaroo mentioned... check the thermostat and the water pump.

A stuck-up thermostat will usually slow down coolant flow so when the engine is revving/moving, the heat builds up.

One symptom of busted water pump is that you lose water when the engine is running.

Kung medyo luma na pareho at di pa napapalitan, maybe it's time to do so na rin as it's not that expensive for those parts.

[Automahn]

...One symptom of busted water pump is that you lose water when the engine is running...

Lately I noticed that the overflow tank of my '06 Civic is always empty when I check it up in the morning before I leave the house so filling it up has become a daily chore for me. I've also been suspecting that the water pump is already busted. Where does the water go then if the system has no leaks?:confused:

[NightRock]

Originally posted by jackaroo
NightRock

Have you changed the water pump and thermostat? Old pump may not have enough water flowing. If no thermo, water can flow too fast with insufficient time to cool in radiator.

Also check the clutch fan- may be too soft due to old silicon oil, just replace silicon oil inside clutch fan.

Mukhang eto palang ang hindi ko pa na Try... it was over heating even before overhauling.... I have also notice na mababaang oil pressure..


But there is no sign na sira na ang water pump. well medyo nag babawas nga ng tubig pag tumataas ang temp during up to 50% gauge reading .. is it possible that water pump can be paritally chocked?? that can cause low supply of water during running

[rlp1099]

NightRock,

radiator cleaning- was this done with LavRamon sabay coolant /water mix replenish????

Para lang may checklist and process of elimination:

1. insufficient coolant in system
2. drivebelt defective or not adjusted properly
3. radiator core blocked or grill dirty or restricted
4. thermostat faulty
5. fan not functioning properly
6. rad cap not maintaining proper pressure
7. ignition timing incorrect
8. defective water pump
9. improper grade engine oil
10. inacurate tem gauge

NOTE: troubleshooting list covers 4g54, v6, 4d56, 4mf40

HAYNES 0-21 sec 27

[NightRock]

rlp1099
I dont exactly know what is this LavRamon process as I have done ratiator overhauling medyo maramni nga dirt na nakuha , I have tried water/coolant mixture too.

Radiator cap pinalitan ko na din, Dati fully synthetic sya mas ok nga medyo hindi umiinit pag nasa trapik, Yung temp gauge Ok naman nag zero check ako while running inalis ko yung connection.. nag zero naman. thermostat nalang at water pump ang hindi ko pa na papa check.

Thanks

[Dieseler]

Nightrock,

When is the last time the Water Pump was replaced?

[NightRock]

Originally posted by Dieseler
Nightrock,

When is the last time the Water Pump was replaced?

No Idea but for sure more than a year na.. How long normally does it takes to replace the water pump?

[vinj]

Have you checked out the thermostat already? Another item also is that there may be air pcokets in the cooling system...

[NightRock]

I haven't checked the thermostat yet can it be rapaired or need to re place it??

[frt]

Thermo is replaced if broken.

Also check your clutch fan. it might be spinning but the silicon is not sticky anymore.

Also look for water leaks around the engine and water hoses.

IS the water in the reservoir gone after driving the whole day?

[Dieseler]

Originally posted by NightRock
No Idea but for sure more than a year na.. How long normally does it takes to replace the water pump?

Usually every 60,000 km. Some prefer a longer interval, though.
I had my changed around 65,000, kasama sa timing belt.

[momoyster]

i also experienced that before when driving our '89 pajero at high speed. bagong overhaul ang radiator but the temp would keep on rising as the speed went beyond 100kph. at 120 kph-3000 rpm (sagad na talaga yung makina), the gauge would already be pointing beyond the halfway mark, 3/4 to be exact. slowing down to 100 kph would bring it back to the half point. stuck-up yung thermostat, lime deposits caused thermostat failure

[mark_t]

i also experienced that before when driving our '89 pajero at high speed. bagong overhaul ang radiator but the temp would keep on rising as the speed went beyond 100kph. at 120 kph-3000 rpm (sagad na talaga yung makina), the gauge would already be pointing beyond the halfway mark, 3/4 to be exact. slowing down to 100 kph would bring it back to the half point. stuck-up yung thermostat, lime deposits caused thermostat failure

This is normal with dirty cooling systems.

lime deposits caused thermostat failure[/quote]

This is caused by running a raw water cooling system. ie tubig ang laman
ng radiator.

[pierced]

Andito lang pala kayo! I hope someone can help me with my problem also.. I've read all the posts here.. From page 1 till here I am posting.. I have a 97 L200 4D56 Engine.. When running on a freeway.. Ok lang temp nya.. Problem starts sa traffic.. Even if it's a short traffic tumataas! Hanggang 3/4 and still moving closer to the warning sign (red) and kasi takot ako mag overheat I usually turn off the a/c and when I get home when I check my reservoir ubos ang h20.. I have a new water pump, new head gasket, new camshaft, new rocker arm assy, overhauled my rad, rad cap is still new, valve clearance is correct, belts are new.. It doesnt have a thermostat anymore.. Yung reservoir ko medyo sira na kasi hindi na sealed.. May singaw na.. Havent checked on the clutch fan since I dont have any problem when running * high speed.. But the temp rises when you run uphill..

Can anyone please help me?? TIA

[mark_t]

Andito lang pala kayo! I hope someone can help me with my problem also.. I've read all the posts here.. From page 1 till here I am posting.. I have a 97 L200 4D56 Engine.. When running on a freeway.. Ok lang temp nya.. Problem starts sa traffic.. Even if it's a short traffic tumataas! Hanggang 3/4 and still moving closer to the warning sign (red) and kasi takot ako mag overheat I usually turn off the a/c and when I get home when I check my reservoir ubos ang h20.. I have a new water pump, new head gasket, new camshaft, new rocker arm assy, overhauled my rad, rad cap is still new, valve clearance is correct, belts are new.. It doesnt have a thermostat anymore.. Yung reservoir ko medyo sira na kasi hindi na sealed.. May singaw na.. Havent checked on the clutch fan since I dont have any problem when running * high speed.. But the temp rises when you run uphill..

Can anyone please help me?? TIA

This normal on a dirty cooling system but please put back a thermostat to
make your system complete. You would also need to use premix coolant to hopefully retard the corrosion in your system. Ang problema kasi it would be
very difficult to remove the scaling in your cooling system without the proper equipment.

The use of raw water destroys your cooling system as water is the universal solvent, in simplest terms nilulusaw ng tubig and mga bakal sa makina mo. And your cooling system is the weakest link in the chain in your engine (napakanipis ng pyesa rito).

Ang problema maraming magaling na mekaniko sasabihin sa iyo na personal preference daw ika kung tubig ang gamitin mo pare pareho yan.
But the reality is maintenance is all about protocols, nakakasunod ka ba sa
requirement ng engine for a trouble free operation.
Your situation now is how you can control the corrosion in your cooling system.

[pierced]

This normal on a dirty cooling system but please put back a thermostat to
make your system complete. You would also need to use premix coolant to hopefully retard the corrosion in your system. Ang problema kasi it would be
very difficult to remove the scaling in your cooling system without the proper equipment.

The use of raw water destroys your cooling system as water is the universal solvent, in simplest terms nilulusaw ng tubig and mga bakal sa makina mo. And your cooling system is the weakest link in the chain in your engine (napakanipis ng pyesa rito).

Ang problema maraming magaling na mekaniko sasabihin sa iyo na personal preference daw ika kung tubig ang gamitin mo pare pareho yan.
But the reality is maintenance is all about protocols, nakakasunod ka ba sa
requirement ng engine for a trouble free operation.
Your situation now is how you can control the corrosion in your cooling system.

Thank you sa mga suggestions and advices.. I'll try to do this pag may budget na.. It'll cost me around 3-4k here in Cebu.. With the rad overhaul, thermostat, and reservoir..