Problems with the engine
- Thread starter RvRev2
- Start date
In my case, it became obvious. The previous owner had rebuilt the engine. The intake manifold was nicely painted. After driving down to Vidalia for the Spring Rally, the paint on the intake manifold where the exhaust crossover went was burnt. The rest of the intake manifold remained nicely painted. This made it obvious to me that it did not have the block off plates.
An IR thermometer can be used to see if the crossover section spikes in temperature.
In the photo, you can see the charring where there are NO block off plates installed. Richard's suggestion of an IR thermometer works also.
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Yes if you see much hotter than engine operating temperature there (>300F), it's a sign that the block off plates are not installed
Hmmm... Is there such an animal as paint that changes color with temperature changes that can also withstand higher temperatures?
Yes. "Temperature Indicating" crayons or paint.
Your local Airgas, and other welding supply houses, will have them.
Search temperature indicating | Airgas
Search results for temperature indicating on Airgas
McMaster has them in about 50 degree increments.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
Amazon has them too, although figuring out what one is actually ordering from Amazon industrial supply listing is always iffy.
Both the crayons and the paint are available for $20ish.
Good Luck.
Tom
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Excellent. Thanks very much Tom!Yes. "Temperature Indicating" crayons or paint.
Your local Airgas, and other welding supply houses, will have them.
Search temperature indicating | Airgas
Search results for temperature indicating on Airgaswww.airgas.com
McMaster has them in about 50 degree increments.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.www.mcmaster.com
Amazon has them too, although figuring out what one is actually ordering from Amazon industrial supply listing is always iffy.
Both the crayons and the paint are available for $20ish.
Good Luck.
Tom
I finally got a chance to check the manifold with an IR gun at operating temperature. I'm not sure what I found and would appreciate any opinions. If I need to drain the antifreeze and pull the maifold I would rather do it when I want to not when I have to. The passenger side was less than 250 but over 240 and of course the IR thermometers flucuate as you watch them. The drivers side was over 210 but less than 220 and flucuating. Other places that I checked were about 200 to 250 so I'm not sure exactly what to think. I didn't like that I had that much difference between the sides. Like I said I appreciate and opinions on if I need to pull the manifold or I'm ok like it is. Thanks
Mel
Mel
The intake is a bit of a job. You do have to drain down the antifreeze.
Search the photo sites for the process. It can be messy too in some cases.
I dont know what temps would be. But from what your showing, I would think that crossover area would be hotter then 250. But maybe not at idle.
You can usually see plates.
