Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: billdn on July 14, 2022, 01:57:52 PM

Title: Refitting exhaust and stud for collars too short 🤔
Post by: billdn on July 14, 2022, 01:57:52 PM
Just in the throes of refitting exhaust and I'm finding that there is insufficient thread to secure the collar. The studs were removed because I had some blasting done to clean up engine.
The studs are 47mm long, as part manual says for F model.
The stud is screwed fully home in the head   but if I wind it out a bit the collar fits fine. The thread length on the stud is the same both ends, so it's not in wrong way round.
Should I just back out stud from head enough to secure collars then tighten?
Title: Re: Refitting exhaust and stud for collars too short 🤔
Post by: billdn on July 14, 2022, 02:34:26 PM
Doh! Doh!
Thought I'd already removed gasket before blasting, obviously not.
Senior moment ...again!
I blame the heat here in Sussex 😅🤣
Title: Re: Refitting exhaust and stud for collars too short 🤔
Post by: Nurse Julie on July 14, 2022, 02:35:07 PM
Are the exhaust collets fully seated Bill. If they aren't pushed in all the way, this gives the effect that the studs don't have enough thread to fit the collars.
Title: Re: Refitting exhaust and stud for collars too short 🤔
Post by: Nurse Julie on July 14, 2022, 02:35:54 PM
Doh! Doh!
Thought I'd already removed gasket before blasting, obviously not.
Senior moment ...again!
I blame the heat here in Sussex 😅🤣
😂😂😂😂😂😂
Title: Re: Refitting exhaust and stud for collars too short 🤔
Post by: McCabe-Thiele (Ted) on July 15, 2022, 08:21:52 AM
Easy done when I stripped my cylinder head I initially thought they were part of the ports - one was a bit out of shape so then I realised they were gaskets.
Title: Re: Refitting exhaust and stud for collars too short 🤔
Post by: taysidedragon on July 15, 2022, 11:48:47 AM
When I stripped my engine down I found 2 gaskets fitted in each exhaust port! They must have been too lazy to pry the old ones out, or didn't see them. That explained why the exhaust collets had all been ground shorter. 🤨
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