Author Topic: Gasket paper  (Read 1312 times)

Online Nomad54

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Gasket paper
« on: 23.02. 2025 15:17 »
I am in the process of rebuilding an ex police a10 alternator model. Up till now I have purchased 3 gasket sets and none of them have the proper outer chaincase gasket. So my next option is to make my own. What I need to know is what is the best gasket paper to use and what thickness to use or if there are any alternator a10 owners out there who know where to get the correct gaskets please let me know.
Tom
BSA 1963 A10A
Stirlingshire
Scotland


Online groily

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Re: Gasket paper
« Reply #2 on: 23.02. 2025 16:57 »
So would I. I use it for almost everything (where paper is needed that is!)
Bill

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Re: Gasket paper
« Reply #3 on: 23.02. 2025 18:35 »
G'day Nomad.
CB's link is great stuff and what I use. I like Permatex Aviation gasket goo as if your careful the gasket can be re-used.
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
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Online berger

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Re: Gasket paper
« Reply #4 on: 23.02. 2025 21:35 »
flexoid or cornflake box when i'm skint  *beer* but i must say when i wasn't skint i bought a roll of cork and made betsy's chain case gasket out of it and it was soooooo good i made one for the berger build , no drips here and betsy's has been on and off three times. *yeah*just don't get heavy handed on the screws.  is it summer yet getting fed up now and  the beer belly is expanding like that expanding foam stuff does.

Online Triton Thrasher

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Re: Gasket paper
« Reply #5 on: 23.02. 2025 21:43 »
These make better gaskets than do corn flakes packets.


Online berger

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Re: Gasket paper
« Reply #6 on: 23.02. 2025 21:47 »
not buying them bggers unless i put docs in em  *beer*

Offline BagONails

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Re: Gasket paper
« Reply #7 on: 24.02. 2025 00:16 »
best gasket paper to use and what thickness to use or if there are any alternator a10 owners out there who know where to get the correct gaskets please let me know.
Tom


Tom,
Most of the commercial precut paper engine gaskets are 0.8mm thick.

Things like chain case can stand being thicker, so more durable. You can permanently 'glue' one side to the inner face and just grease the case joint surface. As per Bergs' comment above a 3mm rubberized cork gasket is great for this.

Ian
59 GF A10
67 Spitfire under resto
2013 kwaka W800 Desert Sled (ex write off)

Nil Desperandum

Offline BagONails

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Re: Gasket paper
« Reply #8 on: 24.02. 2025 00:48 »
G'day Nomad.
CB's link is great stuff and what I use. I like Permatex Aviation gasket goo as if your careful the gasket can be re-used.
Cheers

G'day Muskoid, Have you found Flexoid brand here in Aus? If so I'd like to buy a roll.

I use the Aviation goo too also Loctite No3 which is very similar, brown and sloppy!

I wondered about the Loctite 518 for the rocker box with no gasket. but I think the flanges are too narrow. 
https://www.henkel-adhesives.com/au/en/product/gasketing-sealants/loctite_5180.html

Would be an interesting experiment but so far my paper gaskets with No.3 are holding...and I don't relish going in again any time soon to fiddle with those push rods *pull hair out*
Ian
59 GF A10
67 Spitfire under resto
2013 kwaka W800 Desert Sled (ex write off)

Nil Desperandum

Offline Slymo

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Re: Gasket paper
« Reply #9 on: 24.02. 2025 02:05 »
Yes Flexoid .8mm is good for the cover. Remember to re tighten within a day or so. It will crush but once re tightened is all good. Use it dry as combining it with gasket cement seems to make no improvement in oil tightness and often means you only get to use the gasket once.
NZ

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Re: Gasket paper
« Reply #10 on: 24.02. 2025 14:43 »
in the 60s we used red hermatite and a thick piece of cotton thread

Offline Sakura

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Re: Gasket paper
« Reply #11 on: 24.02. 2025 18:00 »
in the 60s we used red hermatite and a thick piece of cotton thread

Most bikes had more red Hermatite both sides of the joint than in the joint face. Appled over a used and split gasket of course. How I hated to see that.
63 RGS

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Re: Gasket paper
« Reply #12 on: 24.02. 2025 20:57 »
It’s good if Red Hermetite squeezes out to the outside because it smells nice when it gets hot.

Offline Swarfcut

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Re: Gasket paper
« Reply #13 on: 25.02. 2025 09:20 »
  Guilty as charged when using Red Hermetite, but reassuring to see an even line squeezed out as the timing covers tightened down, Then the final icing on the cake of a job well done, working around with a sharp blade to cut away the inevitable protruding gasket edge and a final wash off with meths. Looked as if it had just come from the factory.....Pass me the Sovol and an old flannel.

 Then came that miracle in a tube...RTV. I first saw it as an accessory marketed by Triumph about the same time they replaced torque settings for big end bolts by measuring bolt stretch...(or did I dream that?)  Not the miracle  sealant promised, dangerous in the wrong place, think bits breaking off like an internal combustion engine blood clot, and the tube gone rock hard when you needed it for a second time. Silicone bathroom sealer is fine these days, used with care.

 Hylomar edged Hermetite to the market margin, and was supposedly developed for Rolls Royce. Cellulose Thinners was the clean up solvent, as an aside meths is rarely seen these days.  .

 Swarfy.

Offline BagONails

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Re: Gasket paper
« Reply #14 on: 25.02. 2025 12:46 »
Torque to yield is definitely a thing, seen mostly on cyl.head bolts. You might see a torque figure for preliminary tightening then a further rotation  through a specified angle, taking the bolts into the plastic range of the stress/strain curve which tends to even out the resulting clamping force. The bolts are specially made for this with a wasted down section in the middle somewhere and are normally a single use item.  Doesn't sound like a good idea for a big end bolt though... *eek*
Ian
59 GF A10
67 Spitfire under resto
2013 kwaka W800 Desert Sled (ex write off)

Nil Desperandum