Author Topic: Refitting cylinder head - washer and nuts?  (Read 210 times)

Offline Phantom Rider

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Refitting cylinder head - washer and nuts?
« on: March 23, 2020, 08:10:41 PM »
The rebuild of my 400/4 continues at a snails pace - however working from home may have some hidden benefits i.e. more time to tinker with my collection of old bikes!!  I need to replace the head gasket, and was planning to replace the domed nuts and various washers - however after pricing this up on the David Silvers site I'm reconsidering whether this is necessary. What is the considered opinion on what should be replaced, and what can be reused.  Also are there any other suppliers of these items?  Thanks in anticipation.

Stay safe everyone and if you have to self isolate the garage is the perfect place to do it!!

Cheers

Steve

Offline Bryanj

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Re: Refitting cylinder head - washer and nuts?
« Reply #1 on: March 23, 2020, 08:28:02 PM »
Just replace the "copperised" washers which i think are those under the domed nuts but not sure and i think they are a Honda only part

Offline Bryanj

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Re: Refitting cylinder head - washer and nuts?
« Reply #2 on: March 23, 2020, 09:02:59 PM »
You aint gona get them now unless you order from cms as Silver will be closed

Offline Bryanj

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Re: Refitting cylinder head - washer and nuts?
« Reply #3 on: March 23, 2020, 09:09:35 PM »
90442377000 and there are only 2 of them but €7 each +tax and shipping

Offline Oddjob

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Re: Refitting cylinder head - washer and nuts?
« Reply #4 on: March 24, 2020, 02:19:47 PM »
You aint gona get them now unless you order from cms as Silver will be closed

Online shops are still allowed to open
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Offline Athame57

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Re: Refitting cylinder head - washer and nuts?
« Reply #5 on: March 24, 2020, 02:21:53 PM »
You aint gona get them now unless you order from cms as Silver will be closed
The David Silver home page says their mail order continues to function. If you can't see what you are looking for on the new parts list you can ask them if they have it anyway. That's how I got an obscure bit for a carb, they cannibalised one for me. https://www.davidsilverspares.co.uk/
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Offline mike the bike

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Re: Refitting cylinder head - washer and nuts?
« Reply #6 on: March 24, 2020, 02:35:40 PM »
Try annealing them and re use.
Hesg you a cherry red colour and quench.   This softens them up so they seal better.
If at first you don't succeed, skydiving is not for you.

Offline Bryanj

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Re: Refitting cylinder head - washer and nuts?
« Reply #7 on: March 24, 2020, 03:25:45 PM »
Mike you cant anneal them they are not solid copper, they are only "copperised" as a coatind

Offline mike the bike

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Re: Refitting cylinder head - washer and nuts?
« Reply #8 on: March 24, 2020, 03:35:27 PM »
Mine are solid copper
If at first you don't succeed, skydiving is not for you.

Offline Bryanj

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Re: Refitting cylinder head - washer and nuts?
« Reply #9 on: March 24, 2020, 04:12:51 PM »
Maybe aftermarket, didnt do that many 400's way back, to be honest didnt do many of any Jap 4 stroke(cept CX500) and only remembering a couple i did 5-10 years back so willing to be proved wrong

Offline ka-ja

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Re: Refitting cylinder head - washer and nuts?
« Reply #10 on: March 24, 2020, 07:28:39 PM »
Don't the ones under the "dome" nuts have washers with a built in rubber seal?
nice bike,nothing in the bank

Offline Nurse Julie

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Re: Refitting cylinder head - washer and nuts?
« Reply #11 on: March 24, 2020, 07:49:14 PM »
Don't the ones under the "dome" nuts have washers with a built in rubber seal?
Yes, Dowty type washers under the two tall domed nuts.
« Last Edit: March 24, 2020, 07:55:23 PM by Nurse Julie »
Im a Nurse, trust me, this won't hurt.....much !!!

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