Exhaust manifold question
A while ago we had a big exhaust leak on my 2000 Flair, Workhorse 7.4L. We took it to the shop and they replaced both manifolds.
2 days after we got it back, we went on the road and after 20 minutes the problem came back on the drive side only. We took it back to the shop and they fixed it under warranty, they said the manifold they installed was defective.
We drove it a couple of times, about 500km each time without a problem.
Last Friday we went out again and at some point the engine started stuttering, then vibrating hard enough that the steering wheel was shaking some. I slowed down and the vibration went away but the RV lost a lot of power and it started smelling like gas inside. I pulled over turned the engine off and looked around but didn't see anything abnormal (I am definitely not a mechanic but I tried all the same).
I started it again and went back on the road. The driving was better but the tapping noise from the manifold started a couple of minutes after that. Not very loud at first but by the time we reach our destination it was like the first time we had the problem.
I imagine the heads are not the problem since the shop replaced the manifold twice and never mentioned that to be a potential issue.
Is it possible that it's coming loose? Does anyone have an idea of what may be causing this to occur?
Thanks.
2 days after we got it back, we went on the road and after 20 minutes the problem came back on the drive side only. We took it back to the shop and they fixed it under warranty, they said the manifold they installed was defective.
We drove it a couple of times, about 500km each time without a problem.
Last Friday we went out again and at some point the engine started stuttering, then vibrating hard enough that the steering wheel was shaking some. I slowed down and the vibration went away but the RV lost a lot of power and it started smelling like gas inside. I pulled over turned the engine off and looked around but didn't see anything abnormal (I am definitely not a mechanic but I tried all the same).
I started it again and went back on the road. The driving was better but the tapping noise from the manifold started a couple of minutes after that. Not very loud at first but by the time we reach our destination it was like the first time we had the problem.
I imagine the heads are not the problem since the shop replaced the manifold twice and never mentioned that to be a potential issue.
Is it possible that it's coming loose? Does anyone have an idea of what may be causing this to occur?
Thanks.
