Technique for removing "frozen" diffuser pipeTechnique for removing "frozen" diffuser pipeIt's called a diffuser pipe in the owner's manual, but I've also heard it referred to as the muffler insert. Anyway, on my 1965 CB77 both of them are seriously stuck in the muffler. I've removed the small bolt at the end of the muffler that secures the insert inside the muffler and I've even done some moderate "whacking" on the insert with a block of wood and small hammer, but I cannot get either one to budge. I want to get them out to either clean them up (probably the first time they've ever been serviced) or replace them. Does anyone have a suggestion for another technique for breaking these loose without damaging the muffler? And do they pull straight out, or do they require a turn to the left or right before pulling out? Thank you!
Rone, I would saturate them with PB Blaster and let them set for a while. If they are stock inserts, they should have a small bar running across the end. I have gotten them out in the past by using pliers that fit inside where you can get a grip on the bar. Slowly try to move it back and forth and in and out to break it loose. Don't use too much force and keep spraying to break up the rust/corrosion on the inserts. They will come out in time just take your time. Cliff
Rone, I would saturate them with PB Blaster and let them set for a while. If they are stock inserts, they should have a small bar running across the end. I have gotten them out in the past by using pliers that fit inside where you can get a grip on the bar. Slowly try to move it back and forth and in and out to break it loose. Don't use too much force and keep spraying to break up the rust/corrosion on the inserts. They will come out in time just take your time. Cliff
Hi Rone
If you cannot get them out as Cliff suggested ( I have had the bar break ) you could try the following technique which I've used to get corroded VW mutes out. These don't have the cross-bar or the locating screw and were just an intereference fit, and I wasn't bothered about re-using them. I got a large thread cutting tap ( thread doesn't matter ) that was a tight fit into the end of the mute and tapped it in to start it. then turned it and that broke the stiction holding it still; by pulling on the tap as it and teh mute were rotated I was able to gradually remove the mute. The same method should work on a diffuser pipe but it probably won't be much use afterwards. Hopefully you won't need to do this, Phil thanks, Phil! Ronethanks, Phil. I've got them soaking in Kroil now and will keep trying to bust them loose. But I'll try your technique if all else fails.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
