cylinder head reface

[jason7100]

tsikoteers,

My car is overheating when I go for sustained runs of 90 to a hundred kph after an hour of driving. Also overheats on steep climbs in low gear. Dont know what to repair. Some said I should reface the cylinder head as it is warped during high temps... ( I just said... "what duh???) :confused:

thanks!

[Ungas]

Are oil leaks visible inbetween your cylinder head and engine block? Did you just overheated the engine recently to a point that the engine stalled?

Common culprits before cylinder head resurfacing:
- cylinder head gasket torn, leak due to excessive heat build up.
- cooling system clogged; radiator cleaned and checked for leakage or clogged up channels. Insufficient coolant level. Check and Inspect for water pump failure.

[jason7100]

Originally posted by Ungas
Are oil leaks visible inbetween your cylinder head and engine block? Did you just overheated the engine recently to a point that the engine stalled?
-wala naman leaks, obvious leaks that is. Nope, it did not stall either. pag malapit na red mark yung gauge I stop and let the engine cool down. Ewan ko lang dun sa lumang owner ng car.

Common culprits before cylinder head resurfacing:
- cylinder head gasket torn, leak due to excessive heat build up.
- if this is the case, the gasket will just be the one replace w/o refacing?

- cooling system clogged; radiator cleaned and checked for leakage or clogged up channels.
- cleaning of the radiator is easy but panu yung channels?

Insufficient coolant level. Check and Inspect for water pump failure.- coolant is always ok. water pump is ok coz wala naman daw water leak.

My bet is the clogged channel or the torn gasket... can you recommend a good autoshop?

Thanks!

[Ungas]

Hmm... I did got confused with your replied quote. Next time do reply below the quoted message, so as not to confuse other readers. :D

-wala naman leaks, obvious leaks that is. Nope, it did not stall either. pag malapit na red mark yung gauge I stop and let the engine cool down. Ewan ko lang dun sa lumang owner ng car.
Your engine should have stalled even before it reaches the red mark. So that means, engine temp is still tolerable. Mechanics should only require shaving the cylinder head if the leak can't be remedied by gasket. That means the warp has badly damaged your cylinder head.

- if this is the case, the gasket will just be the one replace w/o refacing?
Yes, possible if cylinder head did not warp.

- cleaning of the radiator is easy but panu yung channels?
There's this one shop that offers radiator and engine cooling channel cleaning. This will cost you around Php900-1,000 for the job. They use a Euro brand machine named Lav-ra-mon. It cleanses all the channels that your coolant-water passes even inside your engine block. They tap hoses to and from your engine and radiator, and with 40 liters of clean water, they will require you to start your engine. You will see all the rust and other inhibitants coming out. Repeat the process a couple of times more. Then add a cleaning solution with another set of water. Drain all the solution inside and another set of clean water to wash out the chemical solution. This will be done 3-4 times just to be sure. Then vaccum all the air out to check if your cooling system has leaks. They will only refill your raidator again with water & coolant if everything is ok.

The only shop I know who has this Lav-ra-mon machine is Mancor services located at Caltex E. Rodriguez.

[OTEP]

A warped cylinder head is usually a CONSEQUENCE of driving the vehicle while overheated. It is rarely the cause of overheating.

You should find out the true cause of your overheating.

Have the radiator checked and your water pump replaced if needed. The water pump should be replaced along with the timing belt (to save on labor charges). Are your electric fans working properly? Do you have the proper coolant mixture in your system? Is your radiator cap ok (check springs and gasket).

If your cylinder head is leaking (either through a gasket or due to warping), there will be some small bubbles and maybe even oil in your coolant. Also, your exhaust will have visible emissions even after it has reached optimum operating temperatures.

[jason7100]

Originally posted by OTEP
A warped cylinder head is usually a CONSEQUENCE of driving the vehicle while overheated. It is rarely the cause of overheating.
______________________________________________
You should find out the true cause of your overheating.

--->I have replaced the thermofan and thermostat, the fan is working ok coz when i rev down, temp drops as quickly as it went up.
_________________________________________________
Have the radiator checked and your water pump replaced if needed. The water pump should be replaced along with the timing belt (to save on labor charges). Are your electric fans working properly? Do you have the proper coolant mixture in your system? Is your radiator cap ok (check springs and gasket).

---> The mechanic I last talked to said the water pump still may be ok as busted pumps tend to leak water. I might be replacing the timing belt when it reaches 70t km. Fans are still working and coolant is ok. Also bought a new rad cap. The old cheap 80 peso cap just lasted for 3 days :mad

_______________________________________________
If your cylinder head is leaking (either through a gasket or due to warping), there will be some small bubbles and maybe even oil in your coolant. Also, your exhaust will have visible emissions even after it has reached optimum operating temperatures.

---> emmision is still ok and smokeless. the only problem I see is that when the engine is reved up and starts overheating, the radiator fluid tends to overfow to the reservoir. This means that the coolant is not enough inside the engine block and radiator. When I let it cool down, the fluid reverts back. But of course we have to take considerations of fluid expansion from the heat. I tried revving the engine whilst it is still cool and the radiator cap removed... It overflows... is that normal?

---> my last hope is the lav-ra-mon method or replacing the gasket with-out refacing. I just hope that shop I consulted is not robbing me blind for unnecessary repairs.

Tnx Ungas and OTEP.

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[OTEP]

Malamang water pump yan.

A water pump does not have to leak to be considered bad and your mechanic did not check it.

The next thing you have to find out is if the cylinder head is indeed warped.

[afrasay]

Jason7100:::Replace your cylinder head gasket. there is a leak between your cylinders and the water chambers. this is the reason why your radiator water overflows to your reservoir. it is due to the pressure from the pistons moving in the cylinder that pushes the water.

[speedyfix]

also consider having a compression test performed. kung pantay pantay yung readings then alam mo di moproblema yung head gasket and it is something else.

[jason7100]

I finally found it... the radiator tubes are blocked by sediments... I had it cleaned... okey na ulit. temp never goes more than half the guage even at high speeds and steep climbs.

NOW eto yung natutuhan ko... when trouble shooting, always suspect the least cost parts for repairs or replacement (ang laki ng gastos ko replacing the thermostat and thermoswitch)... exception of course kung obvious na yung sira... "putsa bakit wala ako preno??? ah kasi sira yung aircon... " labo noh???

Thanks tsikoteers!

[frt]

Originally posted by Ungas

The only shop I know who has this Lav-ra-mon machine is Mancor services located at Caltex E. Rodriguez.

Gano katagal ginagawa to?

[jason7100]

i didnt do it... i just had my radiator cleaned. yung flushing ako na lang. I run the engine with the radiator cap opened and the valve released so water can flow through. dapat nga lang yung thermostat is removed so the water could go inside the engine block. di ko na natangal yun...

[Ungas]

Originally posted by frt
Gano katagal ginagawa to?

2-3 hours gagawin dipende sa laki ng makina at radiator.

[rcdgreat]

Mga sir gandang hapon po! Sorry po newbie lng po pagdating sa sasakyan. I am driving a mazda 3 2004 model. Tanong lang po if may idea po kayo kung mgkano po mgpa top overhaul and san po kya may maaus na talyer at idea po kung magkano abutin? Recently po kasi nag overheat ung sasakyan ko and kala ko po dala lang ng leak sa water overflow reservoir which napalitan ko na po ngaun ng bago but still unti unti pa rin po nauubos ung tubig sa reservoir. Tapos po knina pag check ko po sa oil dipstick at engine oil cap may sludge po na prang kulay gatas po. Sabi po ng friend ko bka may tama na daw head gasket ko. Sana po matulungan nyo ko. Mejo tight din na po kasi budget ko.

Ask na rin po sana ako if safe pa po ba idrive ito? Right now po ngsstart na po ako mgipon ng pera dahil ang sabi po sa akin maghanda na daw ako ng budget at mahal daw po mgpa top overhaul... please po tulungan nyo po ako.... salamat po

[YASNULAB]

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Hi! I have an isuzu hilander xtrm with 4JA1 engine. Please help me get through with my problem on my car. I have this grinding noise from underneath Im not really sure if its coming from the engine or the transmission. Every time I'm on the fourth gear specially when you're fast and you slow down there is this grinding noise that I am hearing. Its really bothering in the sense that I know its not normal I just don't know what to do. It only happens when I'm on the fourth gear all other gears are okay. Recently, I brought the car to a car maintenance shop and have it checked by a mechanic. The mechanic pulled down the transmission and checked every gear. He said that all gears and synchronisers are still in its pristine condition. So cut to the chase, he put back the transmission and the problem was still there.

Please help me.

Im sorry I'm new at tsikot.com. I don't know yet how to make new post. Please teach me.

[Ry_Tower]

Hi! I have an isuzu hilander xtrm with 4JA1 engine. Please help me get through with my problem on my car. I have this grinding noise from underneath Im not really sure if its coming from the engine or the transmission. Every time I'm on the fourth gear specially when you're fast and you slow down there is this grinding noise that I am hearing. Its really bothering in the sense that I know its not normal I just don't know what to do. It only happens when I'm on the fourth gear all other gears are okay. Recently, I brought the car to a car maintenance shop and have it checked by a mechanic. The mechanic pulled down the transmission and checked every gear. He said that all gears and synchronisers are still in its pristine condition. So cut to the chase, he put back the transmission and the problem was still there.

Please help me.

Im sorry I'm new at tsikot.com. I don't know yet how to make new post. Please teach me.

It is the engine then. Looks like hindi magaling yung shop na pinuntahan mo, hindi na-diagnose ng tama. Hanap ka ibang marunog. Binaba agad transmission eh hindi naman pala dun problem.

[09959945532]

Mga sir pahelp pag ba sobrang nipis na ng cylinder head kailangan naba palitan ito?