| Slant Six Forum https://slantsix.org/forum/ |
|
| Eshaust leak was unexpected source. https://slantsix.org/forum/viewtopic.php?t=56645 |
Page 1 of 1 |
| Author: | Sam Powell [ Sun Nov 30, 2014 5:44 am ] |
| Post subject: | Eshaust leak was unexpected source. |
When I started what I thought was going to be a replacement of the intake/exhaust manifold gasket, I discovered both exhaust pipe flange gaskets had blown out. They had less than 5K on them, and I did not consider that as the source of the leak. The exhaust gaskets that went bad were the kind that was steel mesh impregnated with some kind of flame proof white material. Years ago it would have been asbestos. I replaced both with the gasket type that has a steel compression ring on the inner opening of a black composite material of some kind. I slathered each side with a white muffler cement and tightened it all back down. It seems fine now. Is the type of gasket currently installed intrinsically better, or worse than the white ones? Is there something better than either one? Because the problem ended up not being at the head/manifold gasket, I did not take that off, and did not fix the fact that the two manifolds are in contact with each other. leading to potential hot spots on the intake. I also did not fabricate heat shields for the exhaust as I planned to do. But the job was done much sooner. All is quiet under the hood now. The loudest noise at this point is the fan belts. Sam |
|
| Author: | bmimken [ Sun Nov 30, 2014 10:35 am ] |
| Post subject: | |
Sam, I use a slightly different kind of collector gaskets. I have used both of the types you describe, and I have gone to a different type that seals better for me. They are made of a thick malleable aluminum (I think) material that forms quite a nice seal when the exhaust is bolted together. They are more expensive, but I have had good results. They are made by the brand "Percy's", and I get them at most auto part stores in their exhaust parts aisle. Brian |
|
| Author: | Reed [ Sun Nov 30, 2014 11:16 am ] |
| Post subject: | |
My brother's 83 Dodge van has home-made dual exhaust manifolds. They are a stock rear section cut and welded in front of the "tower" and a front section of a stock manifold with an exhaust flange brazed in opposite the #2 exhaust port. We first used the regular exhaust manifold gaskets you describe (metal mesh with material impregnanting it and the other sort with the compression ring) but those would always blow out after a few months. I finally bought him some Remflex gaskets and those have lasted for several years now. Try Remflex and you probably won't go back to anything else. |
|
| Author: | bmimken [ Sun Nov 30, 2014 12:07 pm ] |
| Post subject: | |
Sorry, Sam. I now see that you were talking about the stock manifold exhaust gasket, not header collectors. Brian |
|
| Author: | Pierre [ Sun Nov 30, 2014 12:46 pm ] |
| Post subject: | |
Remflex are the bees knees and can usually tolerate the most abuse... but truth be told even basic mesh sandwich gaskets work well if the surfaces are dead true to each other. Warping or surfaces that aren't parallel to each other, even just a few thousandths it seems, is all it will take to make things go poop. |
|
| Author: | Greg Ondayko [ Sun Nov 30, 2014 1:20 pm ] |
| Post subject: | |
Percy's and remflex are both Good and worth the $ The Deadsoft Aluminum has worked on a few applications for me so far, as have the remflex. Greg |
|
| Author: | Reed [ Sun Nov 30, 2014 2:38 pm ] |
| Post subject: | |
Pierre makes a good point. I was able to use the standard gaskets for years on engines that had manifold and header pipe flange surfaces in good condition. The manifold and pipe flanges on my brother's van are warped and pitted from abuse and neglect by prior owners. Remflex does a great job at sealing pitted and warped surfaces. If the mating surfaces were in better shape he could have used normal gaskets. |
|
| Author: | Sam Powell [ Sun Nov 30, 2014 6:13 pm ] |
| Post subject: | |
Thanks guys. If these blow out, I will get a pair of the better ones. Sam |
|
| Author: | emsvitil [ Sun Nov 30, 2014 6:15 pm ] |
| Post subject: | |
I use the soft aluminum gaskets. Also, when I'm welding my own pipes with flanges; I have the leading pipe slip into the trailing pipe. |
|
| Author: | Junior [ Sun Nov 30, 2014 6:31 pm ] |
| Post subject: | |
ive been using one of these in my turbo setup. holding well. have had the pipe off and on a few times and its still in once piece and holding. http://catalog.remflex.com/MOPAR_Header ... p/6005.htm |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|