Aisan Carburetor install

[SoCalViking]

Got my carb back from a rebuilt at Mark's off road and after the clouds parted I finally had an opportunity to put the carb back on. I noticed a couple things while putting it back on but didnt want to call Mark and take his time away from rebuilding his next carb.

Two things I'm looking for clarification on that I am having a hard time finding answers to.

1. I ordered a new gasket from SOR. The previous owner had used silicon to help seal the carb to the manifold so I had to use a gasket scraper to clean most of it up. Previous owner also damaged the (plastic?) gasket that sits on the manifold. Do I need to order this gasket as well as or should I be fine with just the one gasket? (Land Cruiser Carburetors, Parts, Kits & Gaskets part #042-90B is what I have ordered and have on hand).

2. I noticed theres a hose with a metal tip that insert into the barrel on the manifold. It just slides into place but is loose to the touch. should this be a snug fit? I didn't notice this hose when I originally took the carb off so I dont have much to reference.

Any help would be greatly appreciated. Thanks!

 

[Cincodemustache]

Hey there. I just did a carb swap too. No gasket needed between the carb base and manifold. The carb insulator has a gasket built in. They are relatively cheap When you think about how annoying a carb base vacuum leak is. Here is a shot of my one year old carb insulator. You can see the brownish top that is the gasket.

 

[Spike Strip]

In the pic above the orange-ish layer bonded to the carb spacer/insulator is a gasket. If that layer is damaged or missing you can use the gasket you ordered if you can manage to get the insulator clean and level. However, as stated, there are often vac leaks there and since that whole insulator spacer is still available from Toyota, you may want to consider replacing it. Do not use and sealants. Gasoline quickly dissolves them.

Not sure what hose with metal tip you're referring to. This is where pix will help us help you.

 

[2mbb]

It sounds to me like your carb insulator (picture posted above by cincodemustac) is bad. If the metal tube is the vacuum port I have circled below and it is loose, it should not be. It needs to be sealed to the insulator body. The plastic insulator is actually bonded to a metal sheet below that acts as a heat shield. As stated above, you can try and fix what you have--flatten the gasket surface and regasket, and seal the tube into the insulator body--but since the insulator is still available new, you might just want to get a new one.

It is not too hard to replace. You will have to remove the mounting bolt for some of the hard vacuum lines. It's easiest (I think) to remove the 4 studs that go through the insulator into the intake manifold, then the insulator should slide out. You might want to replace the four studs while you are at it. The part number for the insulator is 21912-61032 and the part number for one stud is 90116-08042.

 

[SoCalViking]

It sounds to me like your carb insulator (picture posted above by cincodemustac) is bad. If the metal tube is the vacuum port I have circled below and it is loose, it should not be. It needs to be sealed to the insulator body. The plastic insulator is actually bonded to a metal sheet below that acts as a heat shield. As stated above, you can try and fix what you have--flatten the gasket surface and regasket, and seal the tube into the insulator body--but since the insulator is still available new, you might just want to get a new one.

It is not too hard to replace. You will have to remove the mounting bolt for some of the hard vacuum lines. It's easiest (I think) to remove the 4 studs that go through the insulator into the intake manifold, then the insulator should slide out. You might want to replace the four studs while you are at it. The part number for the insulator is 21912-61032 and the part number for one stud is 90116-08042.

View attachment 2153415

Thank you all for your answers. @2mbb your picture is correct and confirmed what I had suspected. I will order the new part and have it installed and make a write up for others in the future that may run into this problem. Just to clarify though, the insulator comes with the plenum gasket (the orange/brownish surface in the photo)?

@Cincodemustache thanks for providing a picture to help provide perspective. My cruiser isnt on my property (its at my in laws) so I had limited ability to provide images.

I'll order the part and hopefully have it done by the end of the week! Thanks again.

 

[Cincodemustache]

Thank you all for your answers. @2mbb your picture is correct and confirmed what I had suspected. I will order the new part and have it installed and make a write up for others in the future that may run into this problem. Just to clarify though, the insulator comes with the plenum gasket (the orange/brownish surface in the photo)?

@Cincodemustache thanks for providing a picture to help provide perspective. My cruiser isnt on my property (its at my in laws) so I had limited ability to provide images.

I'll order the part and hopefully have it done by the end of the week! Thanks again.

yes, the gasket is bonded to the insulator. Here is a photo if you visit city racer

OEM Carburetor Insulator for '81+ Land Cruiser FJ40 FJ60

OEM carburetor heat insulator for '81 to 87 Toyota Land Cruiser FJ40, FJ60, BJ60, HJ60. Part # 21912-61035.

www.cityracerllc.com