Vladimir
15+ Year Contributor
- 384
- 105
- Apr 28, 2010
-
Winthrop harbor,
Illinois
Has anyone on here use cerakote on valves and pistons? What was your experience? Can you provide feedback?
There is some concerns that I have with this:
1. If the top of the pistons get coated, wouldn't that cause problems with factory calculated thermal expansion, due to reduced heat being absorbed by the piston? That would cause accelerated wear on piston skirts and cylinder wall, as well as possible oil consumption do to increased cylinder wall to piston clearance, wouldn't it? Yes or no?
2. Since heat is the byproduct of combustion it needs to go somewhere. If the top of the cylinder head and valves, are coated along with the piston tops, wouldn't that heat cause the cylinder walls to get a lot hotter causing further rotating assembly clearance issue, before heat vents into the exhaust? That would possibly increase ECT temperatures, and increase combustion temperature.? It can probably even melt spark plugs do to lack of heat dissipation from the combustion chamber? Yes or no?
3. Since all that heat is now not being absorbed inside the combustion chamber, would the EGT shoot up drastically? I'll assume that on an N/A engine as long as the exhaust is heat wrapped and not close to anything it wouldn't cause any major issues aside from possible front O2 melting or catalytic converter melting if it's still there, maybe under hood temps will go up increasing air intake temps, but nothing major? Or should the exhaust manifold along with the downpipe be coated as well to reduce all that excess heat issues? Yes or no?
4. On a turbocharged engine with all that additional EGT, wouldn't the turbocharger take a beating? Possible oil boiling and starving the turbo. If turbo is watercooled as well it can possibly cause a vapor lock and loss of circulation? Im assuming the oil cooler needs to be upgraded sufficiently enough to prevent the oil from burning at the minimum? Yes or no?
5. How reliable is this practice in first place? Just for dragstrip runs? Can the car actually be driven daily or all that coating will eventually flake off causing additional cylinder wall scaring and other engine contamination issues?
6. How do you tune the engine properly? Without heat dissipating into the piston and valves combustion temperatures will increase, causing knock and some other possible issues. Im assuming it might cause underheaing issues if the engine is cold and not under load?
I stumbled upon a Cerakote advertisement yesterday and got so many more questions, I just don't want to make anyone nauseous reading all of them. This six questions mostly sum up what I'm having difficulty understanding. I've been a tech for 20 years and never seen anyone coating their engine internal like that! Was just wondering if someone on here got some experience with this. We can all advance our knowledge a little! Thanks in advance
Here is picture of what I'm talking about
There is some concerns that I have with this:
1. If the top of the pistons get coated, wouldn't that cause problems with factory calculated thermal expansion, due to reduced heat being absorbed by the piston? That would cause accelerated wear on piston skirts and cylinder wall, as well as possible oil consumption do to increased cylinder wall to piston clearance, wouldn't it? Yes or no?
2. Since heat is the byproduct of combustion it needs to go somewhere. If the top of the cylinder head and valves, are coated along with the piston tops, wouldn't that heat cause the cylinder walls to get a lot hotter causing further rotating assembly clearance issue, before heat vents into the exhaust? That would possibly increase ECT temperatures, and increase combustion temperature.? It can probably even melt spark plugs do to lack of heat dissipation from the combustion chamber? Yes or no?
3. Since all that heat is now not being absorbed inside the combustion chamber, would the EGT shoot up drastically? I'll assume that on an N/A engine as long as the exhaust is heat wrapped and not close to anything it wouldn't cause any major issues aside from possible front O2 melting or catalytic converter melting if it's still there, maybe under hood temps will go up increasing air intake temps, but nothing major? Or should the exhaust manifold along with the downpipe be coated as well to reduce all that excess heat issues? Yes or no?
4. On a turbocharged engine with all that additional EGT, wouldn't the turbocharger take a beating? Possible oil boiling and starving the turbo. If turbo is watercooled as well it can possibly cause a vapor lock and loss of circulation? Im assuming the oil cooler needs to be upgraded sufficiently enough to prevent the oil from burning at the minimum? Yes or no?
5. How reliable is this practice in first place? Just for dragstrip runs? Can the car actually be driven daily or all that coating will eventually flake off causing additional cylinder wall scaring and other engine contamination issues?
6. How do you tune the engine properly? Without heat dissipating into the piston and valves combustion temperatures will increase, causing knock and some other possible issues. Im assuming it might cause underheaing issues if the engine is cold and not under load?
I stumbled upon a Cerakote advertisement yesterday and got so many more questions, I just don't want to make anyone nauseous reading all of them. This six questions mostly sum up what I'm having difficulty understanding. I've been a tech for 20 years and never seen anyone coating their engine internal like that! Was just wondering if someone on here got some experience with this. We can all advance our knowledge a little! Thanks in advance
Here is picture of what I'm talking about
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