Author Topic: Copper sealing washer 90441-333-000 cb350f  (Read 817 times)

Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #15 on: June 28, 2020, 01:37:05 PM »
My bad I was looking at the 400 first, but the 350 just says washer and is the same part number as the plain one, perhaps the copperised was a mod for the 400

Offline SeanFD

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #16 on: September 11, 2020, 12:23:09 PM »
I’m picking this up to ask about washer size.

The sealing washers I took out measured M8 x 18 x 2mm.

I ordered some new ones from Advanced Fluid Solutions (AKA Silicone Hose World) - £2.12 for 2 as against £7.44 each from DS.
https://www.ebay.co.uk/itm/GERMAN-METRIC-Bonded-Dowty-Seal-Self-Centering-Sealing-Washer-Hydraulic-Fuel-AFS/271194638445?ssPageName=STRK%3AMEBIDX%3AIT&var=570153990855&_trksid=p2057872.m2749.l2649

They arrived and measure M8 x 14 x 1mm.

Can I use these? There doesn’t seem to be any other options size wise.
CB750 K2 - Been through Africa!
CB750 K1 - The less, said the better!
CB450 K1 - Stalled.
CB400F Supersport - It's rusty!

Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #17 on: September 11, 2020, 02:25:35 PM »
Should be ok with that

Offline SeanFD

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #18 on: September 12, 2020, 11:45:00 AM »
Thanks Bryan.
🤞
CB750 K2 - Been through Africa!
CB750 K1 - The less, said the better!
CB450 K1 - Stalled.
CB400F Supersport - It's rusty!

Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #19 on: September 12, 2020, 09:29:08 PM »
Looks like that number has been modifyed up to 422 middle number and shows as a thick solid copper washer now

Offline Erwin83

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #20 on: September 21, 2020, 10:20:21 AM »
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.

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.
CB466f café - CB350f streettracker

Offline SeanFD

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #21 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?
CB750 K2 - Been through Africa!
CB750 K1 - The less, said the better!
CB450 K1 - Stalled.
CB400F Supersport - It's rusty!

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #22 on: October 06, 2020, 06:39:40 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?
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 🙄🙄🙄
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline SeanFD

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #23 on: October 06, 2020, 09:13:03 PM »
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!.
CB750 K2 - Been through Africa!
CB750 K1 - The less, said the better!
CB450 K1 - Stalled.
CB400F Supersport - It's rusty!

Offline steven400/4

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #24 on: October 11, 2020, 09:19:01 PM »
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
cb400f2 x7
honda ss 50
gsx 1400

Offline Bodd

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #25 on: October 12, 2020, 06:09:26 PM »
This takes me back, 6th post from the bottom of the page. http://www.skylinesoftware.co.uk/400four15.html

 

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