No exhaust coming out!

[dartguy340]

I bought a used 440 last winter and I put it in my 70 road runner last weekend. Here is my problem. I got it fired up and it seemed like it was only running on 6 or 7 cylinders. I ran it for 20-30 minutes, turning it off occasionly to check timimg, etc. I noticed that the exhaust manifold on the passenger side was very hot to the touch. Yet the driver side was hardly even warm. I could hold my hand on it becasue it was so cool!. I started it again and crawled under it to check the exhaust coming out of the exhaust manifold(there are no exhaust pipes on it yet) Almost nothing was coming out of the driver side but on the passenger side it was coming out stronly and it was hot. I am going to start on it this morning and check it out some more. I was thinking blown head gasket, cam lobes worn? Everything is new, cap, wires, electronic ignition, spark plugs. I checked the firing order again thinking I messed up on the wires, that's okay. It idles and revs up okay, other than having a slight miss, but it could be better. I did not drive it because I am waiting on a driveshaft. Any ideas guys? Thanks, Steve

 

[toolmanmike]

The heat riser valve on the pass. manifold is stuck closed? Doesn't make sense how you explained it though.

 

[70chall440]

Sounds like the cold side isn't firing. The heat riser might be sticking but after 20 minutes there isn't any way you could put your hand on either manifold. If it is cold, it isn't firing.

 

[mopar 3 B]

If the heat riser was stuck shut the exhaust would be coming out the drivers side unless in intake has block off plates.

 

[Tony Tee]

I bought a used 440 last winter and I put it in my 70 road runner last weekend. Here is my problem. I got it fired up and it seemed like it was only running on 6 or 7 cylinders. I ran it for 20-30 minutes, turning it off occasionly to check timimg, etc. I noticed that the exhaust manifold on the passenger side was very hot to the touch. Yet the driver side was hardly even warm. I could hold my hand on it becasue it was so cool!. I started it again and crawled under it to check the exhaust coming out of the exhaust manifold(there are no exhaust pipes on it yet) Almost nothing was coming out of the driver side but on the passenger side it was coming out stronly and it was hot. I am going to start on it this morning and check it out some more. I was thinking blown head gasket, cam lobes worn? Everything is new, cap, wires, electronic ignition, spark plugs. I checked the firing order again thinking I messed up on the wires, that's okay. I revs up okay but it could be better. Any ideas guys? Thanks, Steve

Sounds like someone maybe forgot to install the pushrods and rocker arms on that side. ??? LOL!

 

[dartguy340]

LOL, I know right I'm getting ready to pull the valve cover off right now.

 

[dartguy340]

Sounds like the cold side isn't firing. The heat riser might be sticking but after 20 minutes there isn't any way you could put your hand on either manifold. If it is cold, it isn't firing.

The heat Riser isn't in the passenger manifold anymore it was all rusted out and the shafts we're worn out so I removed it and welded the holes shut that the shaft went thru. This extra info is for those of you that have never done this or worked on a motor.

 

[70chall440]

Something definitely isn't working on that side.

 

[turbine68rt]

I don't get how it could run at all on only half the cylinders. I'd take the exhaust manifold off, check the ports and run it again.

 

[dvw]

Before you tear it apart. Maybe the plug wires are crossed? Check for spark on the right side cylinders? Compression test right side. stock rockers? Have the heads been milled? The valves could be hung partially open. And yes they will run on 4 cylinders.
Doug

 

[Moparnocar]

Check firing order, that does seem odd

 

[70chall440]

Even if the firing order was off, the drivers side would still get hot, maybe not as hot as the other side but it would still show some heat. As to running, I've seen a number of engines that should have never run do so; had a 383 that had every land on every piston broken in multiple places (came apart when removed), worse I have ever see it yet I drove that car into the shop where I took it apart.

 

[plymouthman72]

It almost sounds like your driver's side has no compression. I am not very experienced in this area but could valves be stuck open?

 

[70chall440]

This is one of the problems with the internet, trying to diagnose problems based on the written word. Based strictly on the OP's comments I agree that either there are no push rods on the drivers side (possible but unlikely), they are the wrong ones i.e. too short (unlikely) they are all bent (possible but unlikely), the rockers have become loose of fallen off (possible), or the drivers side cylinders are not getting any spark (pretty unlikely).

 

[turbine68rt]

Before you tear it apart. Maybe the plug wires are crossed? Check for spark on the right side cylinders? Compression test right side. stock rockers? Have the heads been milled? The valves could be hung partially open. And yes they will run on 4 cylinders.
Doug

What's odd is he says the firing order is correct and it revs up ok. I just can't picture it "revving up ok" if possibly one bank isn't firing.

 

[70chall440]

What's odd is he says the firing order is correct and it revs up ok. I just can't picture it "revving up ok" if possibly one bank isn't firing.

Exactly why I said it is hard to diagnose via the written word, there is no way it could run ok and rev normally without the manifold getting hot; something is off here one way or another.

 

[toolmanmike]

Open plenum intake and one side of the carb idle circuit is plugged or adjusted closed? Just grabbing at straws here.My crystal ball is broken.

 

[myk r sanchez]

What's odd is he says the firing order is correct and it revs up ok. I just can't picture it "revving up ok" if possibly one bank isn't firing.

On any of my V8's if so much as one cylinder was dead the car would barely idle let alone rev up...

 

[kiwigtx]

I wonder if a Chebby guy assembled the engine?

 

[PRHeads]

I’d start with a compression test.