TD5 ceramic coated manifold - should the heat shield go back on ontop?

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Originally Posted by PhilipA

Remember the reason to ceramic coat is to decrease the temperature of the manifold so it doesn't warp so much which implies insulating the gas so retaining its heat .

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Not only. It also reduces underbonnet temps, a good thing.

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Originally Posted by oztayls

as well as copper nuts

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Why? Whats the advantage of copper nuts?

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Originally Posted by twr7cx

Why? Whats the advantage of copper nuts?

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Assists with heat expansion and reduces stress on studs.

Do you know the physics behind this Oztayls?
Attachment 125480

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Originally Posted by Pedro_The_Swift

Do you know the physics behind this Oztayls?
Attachment 125480

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No idea myself except that I know that copper is softer and is a better conductor of heat than steel so makes sense in that respect. It's not new science as copper nuts on studs are used by a number of motor brands

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Originally Posted by twr7cx

Where the EGR used to be.

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Is this the EGR blanking plate on the front of the manifold your are referring to, so the probe is directly into the manifold?

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Originally Posted by Jazzman

Is this the EGR blanking plate on the front of the manifold your are referring to, so the probe is directly into the manifold?

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Correct.

I think that the nuts are copper plated just to reduce the chance of them rusting onto the studs.

Regards Philip A

I had my ceramic coated exhaust manifold fitted for a couple of weeks now and I am pleasantly surprised that the EGT temps are consistently 100 degrees lower than before. It also feels like the turbo pick up at low RPM has improved. My Defender weighs in at about 3t, has a VNT turbo, big intercooler and is heavily mapped. Even uphill on the freeway, it takes a fair bit of right foot to set of my EGT alarm at 740 degrees pre turbo. This is one of the best mods, I’ve done to this engine.

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Originally Posted by PhilipA

I think that the nuts are copper plated just to reduce the chance of them rusting onto the studs.

Regards Philip A

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I thought it was the same. Galvanic corrosion with the two bring further apart on the scale and less chance of freezing up.

i have the stainless studs and copper nuts, which are a cone nut so I think that is a heat resistant lock nut. I have the ceramic manifold on the bench and will fit it in the next couple of weeks.

I've been running sans heat shield for the last year and nothing seems to have caught on fire or melted. However the heat shield had been rubbing on everything. So I thought it best to remove it.