₦airaland Forum

GAZZUZZ:
I'm impressed with the OP, most guys would have suffered in silence and stopped updating, but this guy says it as it is.


Overheating is not a death sentence on an engine, it could still run perfectly if put together properly, with the right parts.

Funny enough, the root of overheating in cars is usually one tiny problem like "a pin in a hay stack".

Radiator cap, thermostat, water pump and head gasket are basically the causes of overheating while most times only one is responsible. Coolant leakage and broken fan other obvious ones and simple. Dirt/rust is uncalled for unless wrong coolant was used.

At the end, i just wonder why mechanics end up killing any engine once it overheats the first time. I wonder why a car that has survived so long and just developed cooling problem, all of a sudden the single cell radiator installed in the factory becomes inadequate!

[color=Blue]In an ideal world, it's true, overheating does not necessarily spell the end of an engine.

The issues here are what steps the "mechanic" took to rectify the blown head gasket.

If an engine has run hot to the point of it losing all compression and stalling, the motor must have run really hot. Enough to warp the cylinder head mating surface, cracking it, or cracking the block. A warped head can be dealt with by having the mating surface skimmed, depending on how badly warped it is.

There is a limit to how much metal can be removed. Too much, and the piston crowns can make contact with the valves. There is also the added complication of a higher than normal compression ratio, which will cause detonation, even with the highest octane gasoline, and correctly functioning knock sensors. Detonation over a period of time will lead to piston crown damage.

The crowns will melt, and end up with holes. Prolonged detonation can also burn out the exhaust valves, and cause spark plug damage; the electrodes can melt, drop into the combustion chambers, and really score the hell out of the cylinder walls. This will result in burning oil due to blow-by, and loss of compression if the piston compression rings no longer have an absolute seal.

The thread starter also mentioned that the "mechanic" ground away some metal, presumably to correct high spots on the mating surfaces. By the term "grinding", I would presume (correctly) that this guy employed the use of an angle grinder or sanding disc. How can this process be carried out evenly? Skimming a cylinder head, or decking a cylinder block is a 100% precision procedure. Getting this carried out any other way than using a precision machine, where the head is physically bolted to the machine, values input, then the machine does the rest, WILL result in failure, causing more damage than the actual overheating.

Did this guy send the cylinder head off to get it pressure tested? No.
Did this guy send the cylinder head off to get the mating surfaces measured? No.
Did this guy use new genuine Toyota head bolts to reassemble the cylinder head? No.
Did this guy get the cylinder deck checked for trueness? No.
Did this guy replace the thermostat, that was fitted when the engine originally overheated, and died? No.
Did this guy use a torque wrench on the head bolts, using factory torque specs? Possibly. Possibly not.
Did this guy fit a genuine Toyota head gasket? Possibly. Possibly not.
Did this guy / another guy remove the thermostat, following secondary over heating? Yes.
Did this guy / another guy modify the cooling fan, so it runs constantly, masking an inherent problem? Yes.

Did the owner of this car go about things the wrong way, cutting corners through both repair procedures? Yes.
Did the owner ignore well intended advise from various contributors, who were only trying to help out a brother in distress, and had nothing to gain from wrongly advising him? Absolutely.

I have no axe to grind with the thread starter, he does not have to take advise given here - it's his car, his money, his decision.

However...I strongly advise he budgets for a replacement engine; some of the errors can be reversed, others like grinding metal away from the cylinder head can not. A cylinder head only is another option, but how well this works out will depend largely on the mechanic he uses.

All the best in resolution.[/color]

@Siena, all u have said is right, but ur grammar is much though. U r in developed nation where almost everything is available and there is certification before most auto technicians can practice. Here it is not so. But that does not discredit what our kazeems are doing here. Kazeems have been grinding valves/ removing metal from mating surfaces for a long time with success. They may not have to do it with the precision u guys have over there. But hey, they produce good results. So many years back, there was this Mercedes Benz a diplomat used in Belgium which developed engine problem. They tried to work on the engine to no avail. We bought it and shipped it down to nigeria. A so called kazeem with no special tools worked on the engine and did the grinding of the valves as they call it. Till today, that engine is tops though car has been parked for some years now. So our kazeems may not do all u listed out, but they bring good results. I accept they abuse factory setting in vehicles too. But sometimes it pays. Example is the radiator transmission cooler bypass in Nissan pathfinder 05-07.

obitee69:
Yes he told me he was going to grind the cylinder. What ddoes that mean and how does it affect the car

The mechanic did not grind anything, just a term to make more money from you, I have driven an overheating engine for over six month, no cylinder head was touched. it lies on the gasket, which may not be a marched one.
Go to a genuine Toyota parts outlet to purchase it yourself.
Did you collect the one he changed? There specific holes a mechanic need to perforate upon gasket change for proper water and air ration to balance.
Buy the gasket yourself, stay with the mechanic to change it.

indigene:
The mechanic did not grind anything, just a term to make more money from you, I have driven an overheating engine for over six month, no cylinder head was touched. it lies on the gasket, which may not be a marched one.
Go to a genuine Toyota parts outlet to purchase it yourself.
Did you collect the one he changed? There specific holes a mechanic need to perforate upon gasket change for proper water and air ration to balance.
Buy the gasket yourself, stay with the mechanic to change it.

Bros, in as much as you're trying to avoid extortion, there are some things you have to put into consideration.
Many gaskets are fake, only a few are genuine. And the OEM gaskets cost some more. Besides, how will he identify the genuine types when purchasing these parts?

chukel:
@Siena, all u have said is right, but ur grammar is much though. U r in developed nation where almost everything is available and there is certification before most auto technicians can practice. Here it is not so. But that does not discredit what our kazeems are doing here. Kazeems have been grinding valves/ removing metal from mating surfaces for a long time with success. They may not have to do it with the precision u guys have over there. But hey, they produce good results. So many years back, there was this Mercedes Benz a diplomat used in Belgium which developed engine problem. They tried to work on the engine to no avail. We bought it and shipped it down to nigeria. A so called kazeem with no special tools worked on the engine and did the grinding of the valves as they call it. Till today, that engine is tops though car has been parked for some years now. So our kazeems may not do all u listed out, but they bring good results. I accept they abuse factory setting in vehicles too. But sometimes it pays. Example is the radiator transmission cooler bypass in Nissan pathfinder 05-07.

[color=Blue]The reason you feel "my grammar is too much", is because you choose not to research further on what I've posted, which is what one would normally do if more clarity was needed. Or even post questions. I have done this write-up in plain English, you too have responded in similar English, which proves you do understand modern grammar.

It is because in Nigeria we make excuses for poor service, that things often go wrong. There IS certification in Nigeria, in virtually every field. The issues are users of these services choose NOT to pay for them, preferring instead to choose the cheapest, non-certified route to solve a problem. Some providers of these services also choose NOT to get the relevant training and certification. This increases the number of rogue mechanics, and reduces the number of true certified technicians. Of course, this serves no useful purpose, other than to drive up costs of patronising the qualified techs.

Bad workmanship, cutting corners is just that - cutting corners. We need to stop accepting the services of unqualified mechanics as the norm, stating, "this is Nigeria", as if Nigeria is a unique country on a planet other than earth. Things can work in Nigeria, if we want them to.

You feel these rogue practices in the Nigerian Automotive Industry all work well, and have no repercussions? Lol...please ask yourself why a perfectly good car will have less functionality after a year's use in Nigeria, than a wheel barrow?

There is a reason why it is often preferred to purchase a 2003 Toyota Camry from North America, with all the resultant hoops to jump through due to the importation process, than to simply walk 2 blocks away in Nigeria, and purchase a 2007 model that has had the balls kicked out of it after 8 years of Nigerian use, often with irreversible Kazeem modifications.

You are also confusing grinding in new or used valves, with removing metal from a cylinder head's sealing surfaces. It is a fact that the sealing surfaces between a cylinder head and cylinder block MUST be completely flat. Using an eagle grinder or a sanding disc to remove high spots is a no-no. The gasket WILL leak. Heck, even a scratch on the cylinder deck, just 0.001mm deep will cause the gasket to blow at this point. Why do you think cylinder heads have a tolerance, when it comes to how much they can be machined flat by?

If you are prepared to accept shoddy work from rogue mechanics on your pride and joy, that's just fine. It's your choice. But as long as vehicle users and owners in Nigeria continue to turn a blind eye, and accept garbage as the norm, we shall continue to see failures in all sectors where essential and non-essential services are provided.

And we shall continue to see threads just like this one.
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I just hope this thread is not turning to "kazeems" vs "experts"; there are reasons each of them is still in business.
However, whoever is driving a car ought to be able to do use the internet (Google and my good people of NL) to augment whatever services he's getting anywhere.

Please how much is BORALE engine...my mech said oil is missing with water after changing my gasket and cylinder...house please assist

naijatisumi:
Please how much is BORALE engine...my mech said oil is missing with water after changing my gasket and cylinder...house please assist

It's free since it's for a Bugatti Chiron 2020

nurey:
It's free since it's for a Bugatti Chiron 2020

Oh yea demeanor.