• Husqvarna Motorcycles Made In Sweden - About 1988 and older

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Which sealant do you use?

Hwy

Hwy

Mini-Sponsor
Fifth times a charm...I hope.
Have a hellva time sealing the cylinder cover without a gasket. It seeps oil when hot at different points. Never at the same spot after resealing the cover. Cover is not warped.
I've tried these four products:
  • Permatex Ultra Copper
  • Napa/Permatex Form-a-gasket Aviation
  • Yamabond
  • Permatex Form-a-gasket #1

What product has worked for you guys?



picture.php
 
What is a cylinder cover? Are we talking about valve covers or similar on a four stroke? There is some spray that comes out pink to purple from an a spray can. It can be sprayed into the cap and put on as a liquid. High tack perhaps. used it up years ago. Norton mechanic liked that.
 
yes, I was wondering if you meant valve cover gasket? If so, I use Permatex Ultrablack on it. If it's the head gasket, I would hope that you are always using a fresh one and not using any sealant on it, unless the technical manual specifies that you do.:excuseme:
 
It's called a "top cylinder cover" on a four stroke 510. Valve cover is the cover used for adjusting the valves. I suppose many call it a rocker cover.
No gasket are used nor required for assembly.
 
Hwy;77116 said:
It's called a "top cylinder cover" on a four stroke 510. Valve cover is the cover used for adjusting the valves. I suppose many call it a rocker cover.
No gasket are used nor required for assembly.
Click to expand...
Gotcha, it's a single overhead cam design maybe? Anyway I've used Permatex Ultrablack and the grey colored Permatex gasket making RTV on those types of covers. Also have used it very successfully on the gasketless centercases of two stroke engines, as well a four stroke.

http://www.permatex.com/products/Au...matex_Hi-Temp_RTV_Silicone_Gasket_Sealant.htm
 
Dirtdame;77123 said:
Gotcha, it's a single overhead cam design maybe? Anyway I've used Permatex Ultrablack and the grey colored Permatex gasket making RTV on those types of covers. Also have used it very successfully on the gasketless centercases of two stroke engines, as well a four stroke.

http://www.permatex.com/products/Au...matex_Hi-Temp_RTV_Silicone_Gasket_Sealant.htm
Click to expand...

Thanks Dirtdame. I used the UltraCopper which is the same as UltraBlack but with a higher temp rating. Maybe it's my technique that's failing me.
 
If it is a sealer only joint I use "right stuff", made I believe by permatex. Tough to get apart again though. Prep before with brakecleaner or acetone, one drop of oil or coolant and no seal.
 
I've been using this product for years with great results.:thumbsup:

It's recommended by Harley-Davidson® and we all know they need all the help they can get when it comes to stopping leaks.:lol::lol:

Gasgacinch

When dry you can pull on it like a rubber band. Applies like contact cement. Apply, let dry, stick together.

It has a shelf life so make sure you get a new can and not one that's been on the shelf covered in dust.:D
 
I'm still not clear which part is needing sealant. Is it what most of us would call the valve cover or something else? What bike are we working on? I know we're in the vintage side but still helpful for us numbskulls to know what you're talking about, lol.
 
Honda has some really good stuff and it comes in two different styles. One is softer than the other when dry. I used this Honda brand on a two stroke cylinder instead of a gasket and was impressed with it.
 
ioneater;77140 said:
I'm still not clear which part is needing sealant. Is it what most of us would call the valve cover or something else? What bike are we working on? I know we're in the vintage side but still helpful for us numbskulls to know what you're talking about, lol.
Click to expand...

ya need a pic?:smirk:...look at the first post. It's call a "cylinder top cover" per the service manual.

HuskyDude- Gasgcinch was my first choice but I can't find it around these parts.
 
Hwy;77147 said:
ya need a pic?:smirk:...look at the first post. It's call a "cylinder top cover" per the service manual.

HuskyDude- Gasgcinch was my first choice but I can't find it around these parts.
Click to expand...

Yes, I do. I don't know the vintage parts/lingo/quirks. If you saw service/parts manuals I deal with for a living you'd understand, maybe.
 
I was waiting for the o-ring to arrive from MotoXotica. Brown Box truck arrived a few hours ago and I gave Yamabond another try. It's all buttoned up and I'll start the 510 tomorrow.

We'll see if I sealed it this time. Don't know if I can stand another round off this!

picture.php
 
I re-read your post and if I understand it correct you are trying to seal a gasketless mating surfaces? If so and especially if they are dissimiliar material or just different sizes-expansion/contraction rates I would suggest this. Try a anerobic sealer from Permatex, I believe the number is 518. It flexes with flanges for example to provide a "o-ring" type of seal. Used alot when mating two alum. housings together in the automotive industry, also alum. to steel. Red jelly looking stuff that only dries in absence of air-anerobic. I use it instead of a gasket on my clutch covers and no leaks. I can verify that part number tomm. at the shop if you wish. Scott
 
Scott-
Yes, that's correct. Two machined flat aluminum surfaces together.
Tolerance has to be in the thousands as the rocker arms reside in the top part and adjustment to valve lash has to be taken into consideration, hence no gasket.

I'll see what the results are with this round. I did install a new o-ring this time to the camshaft cover. The previous one was used in the last two attempts.

I would be interested in the Permatex item number.
Thanks
 
Hwy;77189 said:
Scott-
Yes, that's correct. Two machined flat aluminum surfaces together.
Tolerance has to be in the thousands as the rocker arms reside in the top part and adjustment to valve lash has to be taken into consideration, hence no gasket.

I'll see what the results are with this round. I did install a new o-ring this time to the camshaft cover. The previous one was used in the last two attempts.

I would be interested in the Permatex item number.
Thanks
Click to expand...

I have had great luck with it, Permatex part number is 51813, thats a pretty big tube and I'm sure you can buy a smaller tube. Above part number is around $25. I think you will be satisfied with the results. Easy clean up as it doesnt dry away from the actual joint. Scott
 
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