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coolant in new forged engine

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Old Jul 15, 2024 | 06:03 PM
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Manuee_na6's Avatar
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Unhappy coolant in new forged engine

Hello everyone, the other day I finished my forged engine and was able to drive it for 30 miles, the car felt good, until I took out the spark plugs and put the chamber in the pistons

I could see the presence of collant in all 4 cylinders (perhaps in number 3 the most notable) I have not noticed water consumption but I have not driven the car enough

In a couple of days I will receive the pressure checker but I wanted to know if something like this has happened to anyone else

Both the engine plane and the cylinder head were machined, with a Cometic gasket and ARP bolts that I installed strictly following the instructions.

Anyone who has had a similar situation and can give me information I will be grateful


Old Jul 15, 2024 | 09:43 PM
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Coolant in the cylinders is definitely not good. Have you considered the possibility of a cracked head or block? It's rare but can happen, especially with newly machined parts. Maybe get a professional opinion before driving it more?
Old Jul 16, 2024 | 03:10 AM
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Do not drive it any more.

Unless you can find another source for it outside the manifold/combustion chamber, that head has to come off. Do some compression tests first, hopefully that will isolate the problem somewhat. Is it a turbo? Check you haven't hooked your water connections to the oil fittings, and pumped water into your turbo air - if that is even possible.

Water in all four pots seems like an assembly error with the head gasket. How did you assemble the head/head gasket to the block?

Try and find a knowledgeable friend to look at it before you take it apart, there is a limit to what we can do at a distance to diagnose the cause.
Old Jul 16, 2024 | 08:05 AM
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Are you sure it's coolant? A cylinder that's seeing coolant while the engine is running doesn't look anything like that.
Old Jul 16, 2024 | 08:45 AM
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Originally Posted by SpartanSV
¿Estás seguro de que es refrigerante? Un cilindro que ve refrigerante mientras el motor está en marcha no se parece en nada a eso.
I am almost completely sure that it is coolant, tomorrow I will carry out the leak test but the shine on the piston head is yellow (my coolant is yellow) those images are taken the next day with the car cold (I imagine that is why there is so little ), I haven't started it since then as a precaution.

I hope the hg is fine but it doesn't look good to be honest
Old Jul 16, 2024 | 08:50 AM
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Originally Posted by Gee Emm
No lo conduzcas más .

A menos que puedas encontrar otra fuente fuera del colector/cámara de combustión, esa culata tiene que salir. Haz algunas pruebas de compresión primero, con suerte eso aislará el problema de alguna manera. ¿Es un turbo? Comprueba que no hayas conectado las conexiones de agua a los accesorios de aceite y que no hayas bombeado agua al aire del turbo, si es que eso es posible.

El agua en los cuatro recipientes parece un error de montaje con la junta de culata. ¿Cómo montaste la culata/junta de culata al bloque?

Intenta encontrar un amigo experto para que lo mire antes de desarmarlo, hay un límite a lo que podemos hacer a distancia para diagnosticar la causa.
The turbo lines are connected to the pump inlet and the thermostat box, there should be no oil there, which makes me suspect that the problem is in the head (it also seems strange to me that it is in the 4 cyls)
Old Jul 16, 2024 | 09:45 AM
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1.6 has coolant in a few locations on the intake side, including cold start.
Old Jul 16, 2024 | 11:15 AM
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Originally Posted by Manuee_na6
I am almost completely sure that it is coolant, tomorrow I will carry out the leak test but the shine on the piston head is yellow (my coolant is yellow) those images are taken the next day with the car cold (I imagine that is why there is so little ), I haven't started it since then as a precaution.

I hope the hg is fine but it doesn't look good to be honest
Typically if you're burning coolant you won't have any carbon buildup in the cylinder, there will be some white smoke out the exhaust, and the exhaust will smell very sweet. As mentioned, troubleshooting is limited over the internet but I don't think it's a head gasket problem.
Old Jul 16, 2024 | 05:28 PM
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Originally Posted by SpartanSV
Typically if you're burning coolant you won't have any carbon buildup in the cylinder, there will be some white smoke out the exhaust, and the exhaust will smell very sweet. As mentioned, troubleshooting is limited over the internet but I don't think it's a head gasket problem.
The problem is not the charcoal but the yellow antifreeze points that are on top (in the n3 it is the one that is best appreciated) tomorrow I will put pressure in the cooling circuit and update the news, hopefully it is a scare but it is too yellow not to be coolant :/
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