New Intake Manifolds, how tight does one tighten the circular clamps?

[FJ_Hooligan]

JBC,

My solution was to buy a bag of the O-rings from McMaster-Carr and change them on a more regular basis. 

The first set lasted well for at least 25 years.  I figure I'll stay ahead of the next deterioration cycle by changing them at the 20 year mark.  :-)

[JoBrCo]

JBC,

My solution was to buy a bag of the O-rings from McMaster-Carr and change them on a more regular basis. 

The first set lasted well for at least 25 years.  I figure I'll stay ahead of the next deterioration cycle by changing them at the 20 year mark.  :-)

OK Hooli that's great for the seal, never mind all that maintenance wearing things out by constantly doing and undoing fasteners, and such, but that aside, I was also asking for a solution to curb the corrosion of the Aluminum Head, specifically the machined mating surface that needs to be as flat, without pitting from corrosion, as possible.  Sanding corrosion off every time one changes an o-ring will definitely reduce it to anything but flat.  It's better that the o-rings don't have to conform to irregular surfaces (pits). A sealant would stop moisture from reaching the aluminum.  I'm thinking a very thin coat. Yes/No Maybe? What do you think?  Maybe that I'm barking mad? 

FJ Forever!   

JoBrCo

[FJ_Hooligan]

How much pitting are we talking about?  I can't imagine that it would be all that bad.  Can you dress it up with a little fine sanding?  I'm sure you'll store it better going forward.

If it's not badly pitted, I'd just install the O-rings and not worry about it.

I kind of dread the turbulence you will suffer when you get around to checking the valve clearances.  Let me just pre-warn you that the exact value doesn't matter as long as they aren't too tight or too loose.

[JoBrCo]

How much pitting are we talking about?  I can't imagine that it would be all that bad.  Can you dress it up with a little fine sanding?  I'm sure you'll store it better going forward.

If it's not badly pitted, I'd just install the O-rings and not worry about it.

I kind of dread the turbulence you will suffer when you get around to checking the valve clearances.  Let me just pre-warn you that the exact value doesn't matter as long as they aren't too tight or too loose.

Thanks for hanging with me tonight buddy, I really do appreciate it.

Yes, I'm a pain in the ass, I know, just ask my wife, I feel sorry for her sometimes, seriously.

As far as valves go I was planning on adjusting them to the widest as possible without going out of spec, of course.

I've already purchased the Valve Tool, and picked up the valve cover gasket and the 8 plugs from Randy.  Just waiting to save some money for the shims.  I really hate the fact that I'll be doing it twice, the first time to find which shims I'll need to purchase, the second to replace them.  It sucks only having one vehicle, which is the one you're resurrecting from moth balls.

The corrosion isn't that bad, I used an X-Acto mini block plane blade to remove the varnish and corrosion, then polished it up a bit with 800 grit Wet/Dry, but still there is a little pitting.  I wish I had a "super flat," machined to a very fine surface, block of stainless steel, at least 1/4" thick and about 2" square, because then I'd have no problems polishing it with the 800 grit, ensuring the entire surface remained absolutely flat.  Actually the bolt holes are mushroomed out a slight bit, from the tapping process, maybe.  I'm going to try and flatten them out a bit, with a flat jewelers file, to ensure as close a fit as possible.  I've been known to achieve a higher vacuum than factory specs on some 4 barrel carbs.  I hope to do the same here.

And finally yes, I shall be keeping much better care of her, after this reconstitution.

Thanks again for your time, my friend, whether you like it or not.


FJ Forever!  


JoBrCo

[FJ_Hooligan]

Again, this is not brain surgery.  It's more like horseshoes; you'll be close enough.

No worries man.  Sometimes new members take awhile to assimilate.  Now that I know what to expect, it's all good.

Everyone will help wherever they can.

[racerrad8]

If you really need to add something to aide the sealing,  use sone Teflon tape along with new o-rings. A single layer will be fine.

Randy - RPM

[JoBrCo]

Again, this is not brain surgery.  It's more like horseshoes; you'll be close enough.

No worries man.  Sometimes new members take awhile to assimilate.  Now that I know what to expect, it's all good.

Everyone will help wherever they can.

Yes, well I suck at horseshoes!   

FJ Forever!   

JoBrCo

[JoBrCo]

If you really need to add something to aide the sealing,  use sone Teflon tape along with new o-rings. A single layer will be fine.

Randy - RPM

Glad you're here Randy, I'm assuming you don't like the Permatex ultra black for this application?  I'm more concerned about protecting the Aluminum from moisture.  But it would seem that no one, at least you two, thinks it's wise, No?

FJ Forever!   

JoBrCo

[racerrad8]

No, silicone based products breakdown with fuel.

Ultimately, there should not be any moisture up there as the heat when the engine is running will evaporate it.

The gas tank should protect the area when not riding/running.

Randy - RPM

[JoBrCo]

No, silicone based products breakdown with fuel.

Ultimately, there should not be any moisture up there as the heat when the engine us running will evaporate it.

The gas tank should protect the area when not riding/running.

Randy - RPM

OK, Randy and Hooli, just plain o-rings, nothing else.  But I am going to file flat those mushroomed bolt holes, and that's final!!  

One more thing, in the appendix, the manual (FJ1100L/LC GYSM) said 7.5 Ft Lbs for the IM bolts, right?

FJ Forever!  

JoBrCo

[JoBrCo]

Actually I was wrong, it says 7.2 ft lbs (86.4 in lbs).  The Japanese call them "Carburetor Joints" (FJ1100L/LC GYSM, APPX, page 7-10).


FJ Forever!   


JoBrCo

[movenon]

Not going to reduce the seal,  never know it is there,  It will be so thin as to not be a problem.  Still not the best to use.  If it needed it Yamaha would have used it or upgraded to a sealer in later years IMO..  And I like your aftermarket intakes. Put it together and run it. 
George

[JoBrCo]

Thanks George, I have already done so, they are on, torqued to spec at about 90 in lbs.  Shes' been put back together and ready to tune which brings me to my next thread:  Adjusting fuel mixture screws, and synching questions.

FJ Forever!   

JoBrCo