Burned out a fourth exhaust gasket between the turbo and down pipe again. Severly damaged my EVO fan. Is there a gasket out there besides OEM that wont burn out?
Getting aggravated
- Thread starter Slednoggin23
- Start date
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Hillclimbpro
Well-known member
There is the metal one that you can get from the z1 turbo. They are reusable. I had one in my 1100t with the BC 275 and never had a problem. If you can't find it just call Jim at Evo and he can probably get you hooked up with one.
It may be cat PN 3007-802. Listed for z1's. I think that's the one I ordered that was metal. Maybe someone that knows for sure can chime in.
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Turbo11T
Well-known member
Likely the issue is your flange on the dp to the turbo is not flat if the gasket is wrecking. Therefore the steel flange will only make it worse. Take your DP off and have the surface ground flat. You can use a large belt sander or take it someplace.
My gasket blew out when I was on a week long trip to Revelstoke. We could not get a replacement so I took the remainder of the gasket out and bolted the down pipe back up flange to flange without a gasket. I didn't have any other choice besides to not ride. It has been like that for approximately 400 miles. My EVO melted pretty bad from the first leak. I haven't noticeed any additional melting since my "feild modification" to get back on the hill. I plan to take it all apart this summer and replace the gasket but I most likely will use the metal one for the Z1 turbo.
I did think of this and the DP flange is flat and so is the turbo outlet. I checked them both with a strait edge. I think some of the problem is the distance between the studs. That and the heat that is generated from high boost pressure and load. Mountain sleds cause more of a load on the motor than trail a sled due to Mountain climbing and deep snow. Eight studs would be more like it IMO. I have ordered two 3007-802 gaskets for a Z1 turbo. Hopefully they'll be better than the weak graphite stock ones.
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Turbo11T
Well-known member
You may want to get a thicker dp flange. If this is the stock dp I'm not surprised. Especially if the stock muffler is restricting it. I would bet money that the dp with the stock muff would glow all the way up to the muffler. Free flowing gets the heat out.
I don't think two steel gaskets are going to help you.
I am not running a stock DP or muffler. I am only going to use one gasket at a time.
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Turbo11T
Well-known member
Well, I guess I wasn't born yesterday and I am telling you that the reason cat went to the carbon gasket was to fill gaps. Because on the z1 they used a cast dp flange. The cast would expand and cool at the same rate as the turbo. If you want to make the correct gasket work you will need to heat cycle the sled then retighten the bolts a couple times. What I am saying is cat knew that the steel gasket would not seal issues with gaps and warping. So they went to the carbon gasket. All I am saying is don't waste your time. Get the flange flat on both the turbo and the dp and tighten it after heat cycling it.
You've got a great point. I have not been re-tightening. Makes sense. Ill try it on this one.
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