Confused... Inline 6 ?'s

[Sixxer]

Ok I have a massive exhaust leak between my intake and exhaust... do they actually mate together and why? There is black soot all over the area around where they come together and I can visually see the gasket missing. Here is the replacement gasket I found.
http://www.oreillyauto.com/site/c/de...3929&ppt=C0026

The problem is I can only find 1 bolt, the middle one on the outside. There aren't anymore! I found holes 2 holes in the intake but there is nothing except a bump in the exhaust manifold on the front and back one... It this my nightmare... Someone broke them off in there?

[292farmer]

either broke off, or were forgotten to be put back in or they maybe wormed their way out.

[Sixxer]

Jeezus..... I poked around , they are defiantly broken off in there. Any ideas on what to do?

[Palf70Step]

I have never been able to do it other than pulling both the intake and exhaust off, then replace all the gaskets, then both them back on again. Not real hard. To me the hardest part was always the doughnut flange for the exhaust pipe. It always gave me fits. Everything else was super smooth. I have not even had to readjust the carb either.

[Sixxer]

Originally Posted by Palf70Step

I have never been able to do it other than pulling both the intake and exhaust off, then replace all the gaskets, then both them back on again. Not real hard. To me the hardest part was always the doughnut flange for the exhaust pipe. It always gave me fits. Everything else was super smooth. I have not even had to readjust the carb either.

If I told you I just replaced the doughnut for the exhaust pipe and after several revs under hood I watched the gasket blow out... Yeah..

[Palf70Step]

Yep....been there done that!

[Sixxer]

What I really wanna know is why on earth there is a gasket between the intake and exhaust...

[bubba327]

Pull the intake and exhaust manifolds and clean things up. There is a heat riser passage that allows exhaust gas to circulate up around the intake around the carb base if the bi-metal heat riser is working. this carbons up and needs cleaned out. the heat riser also rusts up and will stick open , closed or somewhere in the middle.
There should be three bolts connecting the exhaust manifold to the intake manifold., Sounds like you may have some missing or broken hardware.

The intake manifold can be changed to a clifford or offenhauser intake, but they should have hot water jacket cast into the bottom especially if headers are also installed . The inline six can be cold blooded with out the two manifolds working together, But the reverse can also happen. the fuel can boil out of the carb in extreme heat of summer.
P.S> the gasket is there to prevent the exhaust leak that you have now
good luck
The gasket shown in your first post is the correct one. But if you get the intake/Exhaust block gasket kit , It comes with a new base gasket and a exhaust doughnut plus a solid gasket for LPG applications(between the two manifolds)

[Sixxer]

Originally Posted by bubba327

Pull the intake and exhaust manifolds and clean things up. There is a heat riser passage that allows exhaust gas to circulate up around the intake around the carb base if the bi-metal heat riser is working. this carbons up and needs cleaned out. the heat riser also rusts up and will stick open , closed or somewhere in the middle.
There should be three bolts connecting the exhaust manifold to the intake manifold., Sounds like you may have some missing or broken hardware.

The intake manifold can be changed to a clifford or offenhauser intake, but they should have hot water jacket cast into the bottom especially if headers are also installed . The inline six can be cold blooded with out the two manifolds working together, But the reverse can also happen. the fuel can boil out of the carb in extreme heat of summer.
P.S> the gasket is there to prevent the exhaust leak that you have now
good luck
The gasket shown in your first post is the correct one. But if you get the intake/Exhaust block gasket kit , It comes with a new base gasket and a exhaust doughnut plus a solid gasket for LPG applications(between the two manifolds)

Thank you! I understand now. I'm not interested in spending the bucks for a header and intake swap but I would like to invest in studs instead of bolts for the intake and exhaust manifold. Anybody know where to get a set of these? I did a search on here and found nothing but I remember reading a post about how they make everything a lot easier to install. Plus since I already have some broken hardware I'm a little iffy re-using the bolts. I would also like to remove the front and rear dowel pins and install bolts or preferably studs. Does anybody make an intake/exhaust stud kit for these engines??

[aerotruk63]

Just have to buy a length of threaded rod and cut to lengths required.

[Vernski]

Hey sixxer try this web site they have lots of inline stuff they will have the exhaust bolt kits....Vernski

http://prostores1.carrierzone.com/se...com/StoreFront

[enick72]

I had some exhaust manifold studs for 2.5/4.0 jeeps in my tool box left over so I used them, they have locking nuts to keeps them from backing out. These worked good for my application with headers I just installed. if you are using stock manifold you will need a couple long studs or just use the 2 long bolts.

[292farmer]

Originally Posted by Vernski

Hey sixxer try this web site they have lots of inline stuff they will have the exhaust bolt kits....Vernski

http://prostores1.carrierzone.com/se...com/StoreFront

has anyone ordered from them? they have alot of stuff! i want it all

[Sixxer]

Originally Posted by 292farmer

has anyone ordered from them? they have alot of stuff! i want it all

I did this afternoon... their exhaust stud kit is on its way!

Now my next issue is should I drill and tap the exhaust manifold holes? The intake to exhaust bolts on the inside were broken off from someones previous repair attemp... or should I try and track down another manifold? Ideas?

[raycow]

I like the idea of drilling and tapping so you can use studs instead of bolts. If you assemble the manifold with brass nuts instead of steel you shouldn't have any problem the next time you need to need to take it apart. This used to be standard practice on old engines, but you don't see it any more.

Ray

[Vernski]

Originally Posted by 292farmer

has anyone ordered from them? they have alot of stuff! i want it all

I ordered the Clifford intake with a adapter plate for a Edelbrock carb , I like it and the quality is good and shipping fare but I'm only a few states away. They have allot of nice cool stuff for in-lines....Vernski

PS They make adapter plates for all carbs!

[292farmer]

what blower will work on their blower intake? looks like a 142/144 weiand blower mount.

[PanelDeland]

I don't have a big leak there but it's starting.So I went to the local JY and got another exhuast mani since I had replaced the donut a couple years ago and knew the studs to the exhuast pipe were "IFFY".The one I got has broken stud(or did have) I drilled them out and picked up a tap but haven't redone it yet.I picked the studs up in the "HELP" section of the LPS.I wanted to be able to tear it down and put it back together instead of having it down while I fixed/found stuff.neither of them has a working heat riser,so I need to adress that also.I had cleaned up and done a spray bomb cleanup on the engine bay and wanted to paint the mani with VHT while I was doing this.