Alternator gasket fitting? - SV650.org

Fallout · 05-12-12, 09:08 AM

Now I've repainted my alternator cover, it's time to bung it back on. I have a gasket and also some instant gasket and have scrapped and cleaned the two mating surfaces, just as you would clean your own mating surfaces before mating. Mr Haynes is a little bit vague about this bit. I don't know whether to:

a) Just use instant gasket sealant
b) Just use the dry gasket
c) Use a combination of both

I was gonna do C and have a very thin beed of instant gasket on both sides of the paper gasket, but since I've never changed a gasket before, I have no scooby if that's overkill. I'm aware the alternator doesn't see much oil so this isn't too critical, but it kind of is because I had an oil leek from here before and this is why I'm fixing/repainting. Time to get it right!

Sid Squid · 05-12-12, 10:01 AM

It should go on dry, although typically the maker will specify a smear of gasket goo on the crankcase side of the gasket, on the areas where the crankcases meet, (over the joint of the top and bottom cases), about a 1/2" on either side of the join is loads.

squirrel_hunter · 05-12-12, 10:03 AM

Option B.

05-12-12, 10:49 AM

Go in dry Fallout, we all know thats how you do most of your mating anyway.

Fallout · 05-12-12, 10:58 AM

Alright then. Dry it is, with a bit of goo in the non-gasketed bits. As Spank said, going in dry is my preferred method anyway!

Bibio · 05-12-12, 06:12 PM

i'm no doubt going to get flamed for this but many many years ago i was told to very lightly rub grease on gaskets. since then i have always done it and never had a gasket leak.

Fallout · 05-12-12, 08:05 PM

Too late now dude. It's on, the bike is full of oil, and it's waiting for it's next ride to start ****ing oil out everywhere!

Sid Squid · 06-12-12, 02:31 PM

Quote:

Originally Posted by Bibio

i'm no doubt going to get flamed for this but many many years ago i was told to very lightly rub grease on gaskets. since then i have always done it and never had a gasket leak.

No flaming, clarification: That doesn't help with sealing, grease will not assist as it's soft enough to pushed aside by even slight pressure, and will soften further or even melt if the area in question is subject to heat, so could not overcome imperfections in the clamping pressure, or seal gaps. Some high pressure systems use gaskets that can fail if not fitted to perfectly clean, dry and degreased surfaces as the gasket can move and deform under pressure, and in extreme cases even slide out of the sealing faces.

A smear of grease may help stop gaskets sticking so that the joint can be opened without damaging the gasket.

Your success with sealing is due to fitting the gasket on good condition, flat enough, correctly cleaned and prepared surfaces - i.e. doing it properly.

Bibio · 06-12-12, 07:34 PM

yup. i never scrape a seal surface and always use petrol, thinners, turps yada yada to soften then a cloth or tooth brush to remove old gasket bits.

Fallout · 06-12-12, 07:42 PM

Right, so I shouldn't have used that gasket scrapper then. Now he tells me!

05-12-12, 09:08 AM	#1
Fallout Member Mega Poster Join Date: Jan 2012 Location: Basingstoke Posts: 2,983	Alternator gasket fitting? Now I've repainted my alternator cover, it's time to bung it back on. I have a gasket and also some instant gasket and have scrapped and cleaned the two mating surfaces, just as you would clean your own mating surfaces before mating. Mr Haynes is a little bit vague about this bit. I don't know whether to: a) Just use instant gasket sealant b) Just use the dry gasket c) Use a combination of both I was gonna do C and have a very thin beed of instant gasket on both sides of the paper gasket, but since I've never changed a gasket before, I have no scooby if that's overkill. I'm aware the alternator doesn't see much oil so this isn't too critical, but it kind of is because I had an oil leek from here before and this is why I'm fixing/repainting. Time to get it right! __________________ MotoGoLoco - You knows it The Shed - Suzuki GSX-R 750 K1 \| Triumph Tiger 1050 K6 Fallout Bikes (VLogs, Tutorials, Bike Vids) Fallout Breakbeat (My Music) Last edited by Fallout; 05-12-12 at 09:13 AM.

05-12-12, 10:01 AM	#2
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Alternator gasket It should go on dry, although typically the maker will specify a smear of gasket goo on the crankcase side of the gasket, on the areas where the crankcases meet, (over the joint of the top and bottom cases), about a 1/2" on either side of the join is loads. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

05-12-12, 10:03 AM	#3
squirrel_hunter Member Mega Poster Join Date: Apr 2005 Location: Sunny Swindon Posts: 3,579	Re: Alternator gasket fitting? Option B. __________________ "A little enthusiastic?" May I add here, GG is awesome and I think I am in love with Stretchie...he rocks my world! SH2 \| 2MA \| GROM \| YSR

05-12-12, 10:49 AM	#4
Spank86 Guest Posts: n/a	Re: Alternator gasket fitting? Go in dry Fallout, we all know thats how you do most of your mating anyway.

05-12-12, 10:58 AM	#5
Fallout Member Mega Poster Join Date: Jan 2012 Location: Basingstoke Posts: 2,983	Re: Alternator gasket fitting? Alright then. Dry it is, with a bit of goo in the non-gasketed bits. As Spank said, going in dry is my preferred method anyway! __________________ MotoGoLoco - You knows it The Shed - Suzuki GSX-R 750 K1 \| Triumph Tiger 1050 K6 Fallout Bikes (VLogs, Tutorials, Bike Vids) Fallout Breakbeat (My Music)

05-12-12, 06:12 PM	#6
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,569	Re: Alternator gasket fitting? i'm no doubt going to get flamed for this but many many years ago i was told to very lightly rub grease on gaskets. since then i have always done it and never had a gasket leak.

05-12-12, 08:05 PM	#7
Fallout Member Mega Poster Join Date: Jan 2012 Location: Basingstoke Posts: 2,983	Re: Alternator gasket fitting? Too late now dude. It's on, the bike is full of oil, and it's waiting for it's next ride to start **ing oil out everywhere! __________________ MotoGoLoco - You knows it The Shed** - Suzuki GSX-R 750 K1 \| Triumph Tiger 1050 K6 Fallout Bikes (VLogs, Tutorials, Bike Vids) Fallout Breakbeat (My Music)

06-12-12, 07:34 PM	#9
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,569	Re: Alternator gasket fitting? yup. i never scrape a seal surface and always use petrol, thinners, turps yada yada to soften then a cloth or tooth brush to remove old gasket bits.

06-12-12, 07:42 PM	#10
Fallout Member Mega Poster Join Date: Jan 2012 Location: Basingstoke Posts: 2,983	Re: Alternator gasket fitting? Right, so I shouldn't have used that gasket scrapper then. Now he tells me! __________________ MotoGoLoco - You knows it The Shed - Suzuki GSX-R 750 K1 \| Triumph Tiger 1050 K6 Fallout Bikes (VLogs, Tutorials, Bike Vids) Fallout Breakbeat (My Music)

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