Besides the funky looking Head Gasket, one of the exhaust
10-11-2007, 05:25 PM
#1
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Besides the funky looking Head Gasket, one of the exhaust
<center><img src="http://pictureposter.audiworld.com/34876/130_0648.jpg"></center><p>valves looked a bit worn. The car has 215K and it appears to be the original head gasket. I was a bit surprised to see the burnt exhaust valve in cylinder 5. Heads being rebuilt and should be ready tomorrow.
10-11-2007, 07:27 PM
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Uhhhh, that looks "burnt" as opposed to "a bit worn"
Wear doesn't make chunks o valve disappear- I've seen UrS cars with higher mileage than yours and perfect compression so that's definitely not way past what I at least would consider expected wear.
10-11-2007, 07:54 PM
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Yup "burnt"it is. The rest were in good shape as well as the
<center><img src="http://pictureposter.audiworld.com/34876/130_0651.1.jpg"></center><p>Pistons/Rings. Is it possible that running the MRC Stage II chips (or any modded chips)could cause a burnt valve? Check out the deteriorating Head gasket.
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10-12-2007, 07:35 AM
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Burning exhaust valves on cylinders 1 & 5 isn't uncommon....
Especially if you are running an aggressive chipset or bigger turbo and don't have an upgraded manifold. The stock manifold doesn't flow as well and causes the heat from exhaust to build up too long there, and over time... well, that's what you are seeing.
Hence if I go to a more agressive chipset, I will be sure to use an RS2 manifold. It helps the exhaust gasses flow much better to avoid that burnup on the #1 and #5 cylinders for which this car is prone.
Right now I'm only running a 2.5 bar MTM chip. I want to go to a Stage 1+ 3.0 VMAP. But, it's a big step because of the manifold.
Hence if I go to a more agressive chipset, I will be sure to use an RS2 manifold. It helps the exhaust gasses flow much better to avoid that burnup on the #1 and #5 cylinders for which this car is prone.
Right now I'm only running a 2.5 bar MTM chip. I want to go to a Stage 1+ 3.0 VMAP. But, it's a big step because of the manifold.
