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Riser gaskets


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OK, so this may seem like a silly question, but I'm considering just cutting new riser gaskets from stock on hand rather than ordering them. The risers barely get over 160*F, and I don't think the real ones are special in any way. Any reason why I shouldn't just make my own?

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No reason not too, although the material used for the riser gaskets is not always the easiest to cut. What makes you indicate they don't get over 160 deg F? If you are using your water temp gauge as your indicator, the sensor is not in the same location and is actually located at the water exit of the block prior to the water being used to cool the exhaust manifolds. You might get a thermal temp gun and do some checks.

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I'm pretty sure the exhaust is well above 160 and that's on one side of the gasket. If a gasket fails water can run straight down into an exhaust port, through an open valve and into a cylinder.

I don't know what material you have, but the gaskets I installed were very stiff, not flexible.

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I did use a temp gun on the manifolds and risers, and they are both uniformly about the same as the block at 160. The raw water out of my exchanger is below 120, so everything seems cool enough.

Good point on the exhaust gas. I'll check the material that I have to see if it can handle the heat. I suspect that it will burn away where it is proud, and then be protected by the iron parts.

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I'm pretty sure the exhaust is well above 160 and that's on one side of the gasket. If a gasket fails water can run straight down into an exhaust port, through an open valve and into a cylinder.

I don't know what material you have, but the gaskets I installed were very stiff, not flexible.

i'd stick w tried and tested purpose built because a failure can result in damage that is too expensive.

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I did use a temp gun on the manifolds and risers, and they are both uniformly about the same as the block at 160. The raw water out of my exchanger is below 120, so everything seems cool enough.

Good point on the exhaust gas. I'll check the material that I have to see if it can handle the heat. I suspect that it will burn away where it is proud, and then be protected by the iron parts.

from the outside, you are measuring the water temp, not the exhaust temp. EGT's can get over 1000*. For the price of a precut gasket, I'd stick with that rather than trying to make my own.

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