Author Topic: Copper sealing washer 90441-333-000 cb350f  (Read 2229 times)

watty51

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Copper sealing washer 90441-333-000 cb350f
« on: June 27, 2020, 09:13:05 PM »
Hi All,
Can the 12 x copper sealing washers 90441-333-000 that fit under the cylinder head nuts be reused. Number 16 on picture.

Ds are asking 3.30 each so that’s £40 for 12 washers, unless that’s the “going” rate seems a bit pricey.

Has anyone else managed to get hold of these from another supplier, or are they a special type.

Cheers
Mark

Offline Johnwebley

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #1 on: June 27, 2020, 09:17:33 PM »
I don't know. But you could try annealing them.

Heat to cherry red then quench

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Offline mike the bike

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #2 on: June 27, 2020, 09:30:37 PM »
+1 on annealing them.
Where's that 10mm socket got to?

Offline mike the bike

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #3 on: June 27, 2020, 09:33:58 PM »
Or you can buy 10 for £2.35
Where's that 10mm socket got to?

Offline Nurse Julie

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #4 on: June 27, 2020, 09:35:09 PM »
+2 with using the old ones.
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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #5 on: June 27, 2020, 09:36:01 PM »
Or you can buy 10 for £2.35
Or, you can also use Dowty type washers.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

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watty51

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #6 on: June 27, 2020, 09:49:37 PM »
Thanks all for the quick response.

Will have a look at the options stated and make a decision.




Offline Moorey

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #7 on: June 27, 2020, 10:26:00 PM »
Or you can buy 10 for £2.35
Or, you can also use Dowty type washers.

What size are the Dowty seals Julie someone has just given me quite a few they measure about 11.2mm ID

Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #8 on: June 28, 2020, 05:05:45 AM »
I thought only 2 of the washers were sealing ones the rest ordinary ones

Offline gtmdriver

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #9 on: June 28, 2020, 07:31:55 AM »
+1 for Dowty Washers

Offline ttr400

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #10 on: June 28, 2020, 07:43:07 AM »
You can re-use the old ones, but i normally replace them.

The oem washers are not copper but copper plated steel. i have also re copper plated old washers before.

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Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #11 on: June 28, 2020, 01:26:52 PM »
Two different part number according to CMSNL 90441-422-000(was377) Washer 8mm 10 reqd, 90442-377-000 Washer seal 2 reqd and they go under the two nuts with threads in the top

Offline Nurse Julie

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #12 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.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
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Offline Bryanj

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Re: Copper sealing washer 90441-333-000 cb350f
« Reply #13 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 #14 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.
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