Intake Manifold bottom tube Question

[Mastrcruse]

Can someone help me understand how this goes back in? Can I follow the diagram from Realoem? Talking 9, 10, 11, 12. Looks like there is a o-ring in the block already.

Also, procedure as I put the manifold back on? Put the tube in and then place the intake on top? Or install all at once?

[MrBurgundy]

The way I do it, contrary to what you're going to read about here, is just hang the manifold on the studs of cylinders number 3/4 after you set the tube in the back

As it hangs there (the manifold), you can force the tube into the block to the point where the spring is completely depressed. When you reach that point, use your other hand that's obviously not compressing the spring to slide the intake down to the head. Then you can slowly release the tube up into the intake.

You don't need any zip ties or anything like that to put it in. Just some elbow grease. It's not as hard as some people make it out to be.

[Mastrcruse]

The way I do it, contrary to what you're going to read about here, is just hang the manifold on the studs of cylinders number 3/4 after you set the tube in the back

As it hangs there (the manifold), you can force the tube into the block to the point where the spring is completely depressed. When you reach that point, use your other hand that's obviously not compressing the spring to slide the intake down to the head. Then you can slowly release the tube up into the intake.

You don't need any zip ties or anything like that to put it in. Just some elbow grease. It's not as hard as some people make it out to be.

Thanks man!

i believe my original one has an o ring on the top, spring, washer, oring (in block). Can you (or others) confirm what parts and order there is?

[zaq123]

Thanks man!

i believe my original one has an o ring on the top, spring, washer, oring (in block). Can you (or others) confirm what parts and order there is?

just think about it:

o-rings seal it, washers retain o-rings and the spring applies needed tension on the whole assembly. So looking at the tube top to bottom:
o-ring,washer........................spring,washer,o-ring.

Pick up a tube of Molykote 55 o-ring grease. It's made specifically for o-rings and once installed, it makes o-ring to swell up just enough to get a better seal.

[digger]

washers aren't to retain the top o-ring- the washers sandwhich the spring.

o-ring in block
washer on o-ring in block
spring on washer
washer on lower step of tube (not upper)
tube and washer in block
only o-ring at top

[djjerme]

I’ve done it both ways.. the zip ties and like Burg, just hang it loose on the studs and squeeze it under. Sent from my iPhone using Tapatalk

[digger]

make it easy for yourself, a couple of zip ties ftw.

lube the top o-ring to

[zaq123]

washers aren't to retain the top o-ring- the washers sandwhich the spring. o-ring in block washer on o-ring in block spring on washer washer on lower step of tube (not upper) tube and washer in block only o-ring at top

How certain are you about washers? My original engine (never disassembled as far as I can tell except TB jobs) had it like I described. It did make sense to me as well since top of the springs sits fine against the tubes bottom ridge and o-ring probably wonÂ’t do the same against tubes top ridge since oring is flexible.....Am I understanding this wrong? Sent from my iPhone using Tapatalk

[digger]

the top oring doesnt fully seat and isnt compressed axially when you put the washer at the top and will be more prone to leaks. the washer prevents it going fully in and the small edge break / chamfer on the counterbore limits how effective the seal can be . the raised part on the tube is a perfect fit for the counterbore in the intake and allows the o-ring to be fully seated. the washer also stops the tube going into the bore of the manifold and being fully located

you dont need the 2nd washer at the top of the spring in reality as you only need 1, but IMO you dont want it at the very top o-ring.

[digger]

[zaq123]

Hmmm, I guess I should minimize the chance of any leaks and change it With ITBs, can I remove it without removal of the center section or I need new intake gasket now?

[digger]

if you installed the o-ring in the manifold first and it was seated against the horizontal face and then you pushed the tube through with washer you'll probably be ok and id leave it.
if you install the washer and o-ring on the tube and pushed it in it will be iffy moreso on the RHD manifold. i did this the first time

the RHD doesnt have the chamfer so the radial sealing of the o-ring works better