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Old 02-01-2018, 11:14 AM   #21
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Quote:
Originally Posted by Pgitug View Post
Aluminum burns up at 1600 degrees.
FYI
gosh, I wonder how outboards even exist.
Exposure to hot things (gas) is different from the temperature of the piece that has that exposure.
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Old 02-01-2018, 11:53 AM   #22
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passed to me by an engine guy....


..... if the OP's turbine outlet temperature reached 1900F or 1038C he would have a lot more to worry about than getting the bolts out of the turbo. In addition, the turbo inlet temperature would be even hotter than the outlet temperature.

I suspect he was looking at some figures for a gasoline engine operating at full load.
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Old 02-01-2018, 12:42 PM   #23
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Agreed with Ski on 250F temp.
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Old 02-01-2018, 03:54 PM   #24
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Quote:
Originally Posted by Ski in NC View Post
The turbine out temp on a 6B 330 will NOT reach 1900F.

And the bolts screw into a water jacket. Not exposed to exhaust gas temp. Threads might hit 250F, bolt head a little hotter depending on mixer design.
Again, Ski is right on. 905°F is max turbine outlet temp. per Cummins on a CPL 1975 330.
I think the highest I've ever seen on any 6 Series marine Cummins is around 1000°F
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Old 02-01-2018, 06:53 PM   #25
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Should I Use Anti Seize On Turbo Bolts?

Quote:
Originally Posted by Ski in NC View Post
The turbine out temp on a 6B 330 will NOT reach 1900F.

And the bolts screw into a water jacket. Not exposed to exhaust gas temp. Threads might hit 250F, bolt head a little hotter depending on mixer design.


I do not see a water jacket for these bolts. But you may be right. The paint where the bolts go into the housing is not burnt. Just where the bolt heads are resting. Interesting.
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Old 02-01-2018, 07:35 PM   #26
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The banjo fitting that the arrow points to connects to the turbo jacket, it's a coolant line. So the turbo is water cooled. The bolts are threaded into the jacket. The paint on the turbo is barely discolored.

I frequently shoot temps on the exhaust and the turbo, NO WAY it's even close to 1900F. More like 200F, closer to 350-400 at the flange which sees exhaust gas.
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Old 02-01-2018, 08:37 PM   #27
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Quote:
Originally Posted by Maerin View Post
The banjo fitting that the arrow points to connects to the turbo jacket, it's a coolant line. So the turbo is water cooled. The bolts are threaded into the jacket. The paint on the turbo is barely discolored.

I frequently shoot temps on the exhaust and the turbo, NO WAY it's even close to 1900F. More like 200F, closer to 350-400 at the flange which sees exhaust gas.


Understand better.
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Old 02-06-2018, 11:36 AM   #28
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Well the high temp Anti Seize has arrived. Appears to be able to withstand much higher temps than I need, but it’s the same price as the lesser temp products so what the heck.

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Old 02-08-2018, 10:41 AM   #29
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I read threads like this and realize just how little I know!!!
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