Max-Falcon
Cadet
- Joined
- Sep 28, 2020
- Messages
- 18
Hi
I am in process of servicing the head on my Mercruiser 470 and consequently had to remove the exhaust manifold which is an aluminum type. Once out, I found some corrosion on the port number 4 of the manifold. Basically after sanding the corroded flakes, now less than half of the diameter of port 4 is a bout 1/8" lower than other ports (photo attached)
My first thought was to get it to a weld shop and have them build up the lip, then send it to machine shop to plane it. But all the welding shops so far refused to do this job, either by saying straight NO or just quoting an unreasonable cost (one of them said at least $1000!)
I am now wondering if there is a quick and dirty DIY remedy for this. I have looked into High temp jb weld, exhaust repair tapes, flux blazing etc. Anyone has had similar experience? Also how hot the surface of the manifold gets right at the head port connection? and if this port leaks a little bit what issues am i going to face?
I am in process of servicing the head on my Mercruiser 470 and consequently had to remove the exhaust manifold which is an aluminum type. Once out, I found some corrosion on the port number 4 of the manifold. Basically after sanding the corroded flakes, now less than half of the diameter of port 4 is a bout 1/8" lower than other ports (photo attached)
My first thought was to get it to a weld shop and have them build up the lip, then send it to machine shop to plane it. But all the welding shops so far refused to do this job, either by saying straight NO or just quoting an unreasonable cost (one of them said at least $1000!)
I am now wondering if there is a quick and dirty DIY remedy for this. I have looked into High temp jb weld, exhaust repair tapes, flux blazing etc. Anyone has had similar experience? Also how hot the surface of the manifold gets right at the head port connection? and if this port leaks a little bit what issues am i going to face?