85 Nissan 720 4x4 Weber Gasket Replacement.

[Thomas Perkins]

Happy Friday Ya'll.Perfect weather here in Georgia to do anything.It is time for my Weber to get new gaskets.They don't last long till gas starts going thru them and going down the carb.I did it not too long ago.I do have a boat load of gaskets.As soon as the engine cools down,I will get started.My weber is  almost 7 years old.It is a Redline and never had a issue.It runs perfect.I wiped the gas stains not long ago and look at it now.It will cause it to idle a little low.The last picture is upside down.See all the gas stains on the linkage.I will make it disappear.I got to go and get another can of brake cleaner.Another area that needs cleaning from gas is where you open the gas door.Clorox cleans it good.More pictures as I take it apart.

Edited October 6, 2023 by Thomas Perkins

[banzai510(hainz)]

be honest it looks fine to me.

Mine is leaky where one needs to clean it every year or so.

 

To me they always dont last long before they weep gas thru is a better saying than leak.

 

the accell pump diaphrames go out the most, Now thats a BAD leak right on the exhaust manifold!

Edited October 6, 2023 by banzai510(hainz)

[Thomas Perkins]

I got the Weber off.Here is where it is leaking.I now will take it apart.It is leaking good.

[Thomas Perkins]

Not bad on the choke side.

 

Edited October 6, 2023 by Thomas Perkins

[Thomas Perkins]

My Serial number.

 

 

 

Edited October 6, 2023 by Thomas Perkins

[Thomas Perkins]

I got it all apart.Inside was clean.I need to get some more carb.cleaner in the morning.As ya'll know,the little filter is made too long.It is crushed.It never has any trash in it.Always like new.It doesn't cause any problems.Here are the 2 pieces of the carb.Top has been cleaned.

Edited October 7, 2023 by Thomas Perkins

[Thomas Perkins]

Here is the bottom section that needs to be cleaned.Here is my Weber box with spare parts.

[Thomas Perkins]

Extra Weber parts.

[Thomas Perkins]

Here is the gaskets that was leaking.I should make my gasket out of my chip board.It is thicker.It is over 2 times thicker.Same stuff I use to make my patterns for my kick panels.I have a bunch of it.

[Thomas Perkins]

II will look up and see when I replaced the gaskets last time.They sure are real thin.I just thought about it.With thicker gaskets.The choke lever might be too high and no go into the top choke place where the little clip holds it.May cause it to bind.Also their is a small plastic piece there that may come out.Mine did and had to find out where it goes.There is also a piece that goes in that hole.Always good to have the parts list showing where everything  goes.I bought this Weber in 2016.Only had to replace gaskets ,everything else has held up.

Edited October 7, 2023 by Thomas Perkins

[datzenmike]

Did you try tightening the screws? Gasket material will compress over time and with heat.

 

I make most of my gaskets from cereal boxes. Water pump, fuel pump, thermostat housing to head and oil pump.

[Thomas Perkins]

13 hours ago, datzenmike said:

Did you try tightening the screws? Gasket material will compress over time and with heat.

 

I make most of my gaskets from cereal boxes. Water pump, fuel pump, thermostat housing to head and oil pump.

Yeah,I did.They were tight.

[Thomas Perkins]

N Here are the 2 pieces to the Weber.All cleaned up.

[Stoffregen Motorsports]

All carburetor gaskets will weep. But they almost never actually leak. Basically, they are sealing out air, and not really keeping in fuel. Ok, the float bowl gasket keeps fuel in, but the base gasket...as long as it's not torn, it is fine.

 

The fasteners do require occasional tightening. Including the lid screws and mounting flange nuts.

[Thomas Perkins]

2 minutes ago, Stoffregen Motorsports said:

All carburetor gaskets will weep. But they almost never actually leak. Basically, they are sealing out air, and not really keeping in fuel. Ok, the float bowl gasket keeps fuel in, but the base gasket...as long as it's not torn, it is fine.

 

The fasteners do require occasional tightening. Including the lid screws and mounting flange nuts.

Ok.I do that often.

[Thomas Perkins]

2 minutes ago, Stoffregen Motorsports said:

All carburetor gaskets will weep. But they almost never actually leak. Basically, they are sealing out air, and not really keeping in fuel. Ok, the float bowl gasket keeps fuel in, but the base gasket...as long as it's not torn, it is fine.

 

The fasteners do require occasional tightening. Including the lid screws and mounting flange nuts.I do that often.

 

[Thomas Perkins]

Here is the top base gasket.Both sides.

 

[Stoffregen Motorsports]

Looks perfect.

[Thomas Perkins]

1 minute ago, Stoffregen Motorsports said:

Looks perfect.

Here it is all cleaned up.And my new gaskets.

[Thomas Perkins]

5 minutes ago, Stoffregen Motorsports said:

Looks perfect.

Gas was coming out of the base gasket.

[Thomas Perkins]

Got the gaskets in at the base.

[Thomas Perkins]

Ready to put back on.

[datzenmike]

4 hours ago, Thomas Perkins said:

Gas was coming out of the base gasket.

 

When running the base gasket is under strong vacuum. Air is trying to get in. Base gaskets don't leak gas out they leak air in

[Thomas Perkins]

33 minutes ago, datzenmike said:

 

When running the base gasket is under strong vacuum. Air is trying to get in. Base gaskets don't leak gas out they leak air .

 

Yeah your right.But when the base gasket is saturated with gas and you turn the engine off.The gas will go down the base.Mine had that effect.It shows in one of my picture.

[butter fingers]

looking at your weber spacer and then the stock manifold makes me ask the question ; why wouldn't you port that manifold to match the spacer ? butter fingers