SOHC.co.uk Forums > CB350/400
Copper sealing washer 90441-333-000 cb350f
Erwin83:
--- Quote from: Nurse Julie on June 28, 2020, 01:31:11 PM ---I could be wrong but the 350 and 400 have a different number of the copper washers fitted, 12 copper for the 350, 10 copper and 2 Dowty type on the 400. It may depend on which fiché / parts book you are looking at possibly.
--- End quote ---
From experience: You're absolutely right.
Took me some time to realize this, as the dowty seals will come out looking much like a normal washer, if it's old enough.
SeanFD:
I resurrecting this thread as I am about to put the head on, finally after all the issues I had with the gasket.
Now, as mentioned several times here, the fiche says 10 x copper sealing washers; thing is, I only took 8 out - or at least I only have 8 now, plus the two dowty-type ones.
Am I correct in thinking that I can replace the missing pair with washers of a different thickness? What would be the impact of leaving them out altogether; say on the two nuts by the spark plugs?
Nurse Julie:
--- Quote from: SeanFD on October 06, 2020, 06:00:41 PM ---I resurrecting this thread as I am about to put the head on, finally after all the issues I had with the gasket.
Now, as mentioned several times here, the fiche says 10 x copper sealing washers; thing is, I only took 8 out - or at least I only have 8 now, plus the two dowty-type ones.
Am I correct in thinking that I can replace the missing pair with washers of a different thickness? What would be the impact of leaving them out altogether; say on the two nuts by the spark plugs?
--- End quote ---
Leaving them out completely won't work as the washer stops the nut going down the stud too far where there isn't any thread. I'm sure there should be 12 of whatever anyway as there are 12 head studs 🤔🤔 Have you left any washers in situ down in dark holes, I know I had when I was counting mine 🙄🙄🙄
SeanFD:
I hope there is nothing deep down that shouldn’t be there as I’m putting it all back together.
According to teh fiche, there should be 10 copper and 2 sealing (dowty-type) The nuts by the spark plugs that I removed were flanged, although the the fiche says hex; since I believe a flange is a replacement for a washer, I have replaced them with a hex nut and a copper washer.
SO now I am putting in 10 new washers – so they are all the same thickness – and trying to find the dowty washers I bought so I can get on to tightening down the head - they must be here somewhere!.
steven400/4:
10 washers are part number 90441422000 the other 2 part number is 90442377000 thoise two have a seal in the middle i am looking at a full set of new washers for my engine rebuild
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