Posted by NoDakInMN on December 29, 2012 at 11:20:14 from (220.127.116.11):
In Reply to: exhaust manifold posted by terry howell on December 29, 2012 at 09:09:28:
If the position markers have corroded away to the point where they cannot be read, as you indicated, you may have to pull the manifold so you can observe the porting and position it correctly. At this point, since a new heat exchanger is only $30 or so, I would replace it. Since you say you are reconditioning the tractor rather than restoring it, I assume that you intend on using it rather than making it a trailer queen. As such, having the H and C marks would make future adjustment positioning easy and trouble free.
I suppose it could be possible to determine the position of the existing one by taking temp reading on various places on the manifold while the tractor is running, but having never done it, I cannot offer any advice on the feasibility of that.
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