Re: &%$*! exhaust manifold!
<font color="blue">...Could the engine block have been warped by the heat ... </font color>
Hi Pete,
How about using a "straight edge" to test for flatness on the block side prior to rebolting the manifold up...
(to test your theory) [img]/forums/images/icons/wink.gif[/img]
Re: &%$*! exhaust manifold!
Pete:
check out John"s idea. You may have to remove the head and have both taken in at the same time to get a proper mating surface.
Could gasket material be an issue ? What about the rest of the exhaust manifold, can it put strain on the one that keeps breaking
Egon
Re: &%$*! exhaust manifold!
John and Egon -- Thanks for the replies. I've wondered about the gasket material since these had to be cut out by hand from sheets. (Just try finding a gasket for an old poly head that was only made for a couple of years back in the 50's!) I'll do the straight edge thing if I ever take that manifold off again, but I'm hoping to avoid that step.
What a pain!
Pete
Re: &%$*! exhaust manifold!
Also look into a type of gasket material like asbestos, and very flexible that could basically "seal" the manifold without "torquing" to the breaking point...
Re: &%$*! exhaust manifold!
Pete:
Hope your solution works.
John's got a good idea.
Perhaps back off on the torque to help reduce stress.
Some usless trivia: Many a year ago I was told cast iron gets harder with age as carbon nodules will form over time at the grain boundaries. Now the fellow who said this had also had a bridge he designed fail in the construction phase due to spring runoff.
Egon
Re: &%$*! exhaust manifold!
Pete,
You might try double gasketing the manifold. That might give you the added float you need.
Steve
Re: &%$*! exhaust manifold!
Ahem, I did the high temp epoxy thing and ran into another speed bump. Since I couldn't find a replacement manifold for the 315 Poly in a truck, I used one for a car. The bottom end that connects with the exhaust pipe is about an inch shorter, so there's a gap between the manifold and the exhaust pipe! [img]/forums/images/icons/blush.gif[/img]
I'm so close!!! But I'll have to tow the beast to another shop to have them finish the job. Heck, might as well replace the entire rusted exhaust system while the old truck is there!
Pete
Re: &%$*! exhaust manifold!
Pete,
If you're going to tow the truck in, they might be able to deal with the mainfold problem too, or at least give you some ideas on what might be causing the problem.
Steve
Re: &%$*! exhaust manifold!
Pete,
Dig deeper and go with headers.
Re: &%$*! exhaust manifold!
Re: &%$*! exhaust manifold!
Pete, don't think $'s, think about how "GOOOOD" it will sound (plus 10-15 added HP). About $100-$125 for normal, twice that for "ceramic coating" which I don't think you would need or want.
Re: &%$*! exhaust manifold!
Are those prices for out of the box headers...or custom made headers? I haven't seen ANY mass produced headers that would fit right up to this old 315 Poly, so if you have a source I'd love some contact info.
Also, wouldn't I have to rejet the carb?
Pete
Re: &%$*! exhaust manifold!
Pete, try these guy's, I think you are a DD4, but I'm not sure. Sanderson
Re: &%$*! exhaust manifold!
Thanks. Unfortunately, when I called they had nothing at all available for my engine. Looks like I'm back to hoping the replacement fits. [img]/forums/images/icons/frown.gif[/img] Pete
Re: &%$*! exhaust manifold!
WOW, I am really suprised Sanderson does not have anything. They deal alot with the old, oddball motors. You could always break out the torch, and welder, and make your own. [img]/forums/images/icons/grin.gif[/img]
Re: &%$*! exhaust manifold!
</font><blockquote><font class="small">In reply to:</font><hr />
You could always break out the torch, and welder, and make your own.
[/ QUOTE ]
Paul -- You have no idea how badly I've wanted an oxy-acetylene rig! [img]/forums/images/icons/crazy.gif[/img] I was pretty good with it in high school voc class, but that was 30 years ago. Besides, if I asked for another tool my lovely bride would strangle me at this point! [img]/forums/images/icons/shocked.gif[/img]
Anyway, the manifold I found on the Web last week just arrived today and it's a PERFECT match for the original! Back in business! I've already blasted it and applied the first coat of manifold paint. Tomorrow evening the second coat. And Saturday if I have time we'll see about bolting it all back together...um, if it proves to be flat, that is! [img]/forums/images/icons/confused.gif[/img]
Pete
Re: &%$*! exhaust manifold!
<font color="red"> Besides, if I asked for another tool my lovely bride would strangle me at this point!
</font color> [img]/forums/images/icons/grin.gif[/img] [img]/forums/images/icons/grin.gif[/img] [img]/forums/images/icons/smile.gif[/img] [img]/forums/images/icons/laugh.gif[/img]
Been there.
Glad to hear you found anouther one. I don't know how we put old cars together in the past without the internet. I have gotten almost everything for my cars over it.