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Intake Screw on Piece
- Thread starter Rockonp04
- Start date
DanR
Diamond Level Sponsor
Here is a PIC of one of myOFY 4 bbl Intakes, The piece you need is 1.5 mm threads x 22mm dia It is the upper bypass hose connection
Best to find/remove from your stock manifold.
Attachments
DanR
Diamond Level Sponsor
Mike, unless my gauge is some how wrong, it is definitely metric. This is what fits in all five of my OFY 4BBL intakes, two of which are new ones. A couple of the used ones have been boogered up by PO's because of the mis-match of bolts used that were not correct.
In the first PIC the thread gauge is metric 1.5
In the 2nd PIC I am holding the "nipple" end the the top by-pass hose connects to for all of my 2.8 V6 intakes whether stock or Ofy. Notice the numbers are at 20mm.
In the 3rd PIC the 1.5 threaded end is inserted into the gauge at 22mm
In the first PIC the thread gauge is metric 1.5
In the 2nd PIC I am holding the "nipple" end the the top by-pass hose connects to for all of my 2.8 V6 intakes whether stock or Ofy. Notice the numbers are at 20mm.
In the 3rd PIC the 1.5 threaded end is inserted into the gauge at 22mm
MikeH
Diamond Level Sponsor
I've been searching the web and can't find anything close to this. I find it hard to believe that ford would have such a unique part. Do you have the intake mounted yet? If not, I would carry it to the parts store to find a match.
Plus, in the pic Dan posted with the thread pitch gauge, it appears to have a taper like NPT.
Plus, in the pic Dan posted with the thread pitch gauge, it appears to have a taper like NPT.
DanR
Diamond Level Sponsor
Rock, I found something that will be a good substitute. I have actually utilized these to make an OFY installation.
Forney item number 75116 M22 x 3/8" FNPT Screw Nipple AND 4 Season P/N 84780
The 4Season nipple is 3/4 and will fit the upper by-pass hose adequately.
Hope this helps you and others !
Forney item number 75116 M22 x 3/8" FNPT Screw Nipple AND 4 Season P/N 84780
The 4Season nipple is 3/4 and will fit the upper by-pass hose adequately.
Hope this helps you and others !
Attachments
Last edited:
husky drvr
Platinum Level Sponsor
I tripped over this looking for Marine fittings. I'm not sure about the pic being to the needed specs.
http://products.worldwidemetric.com...ess-adapters-adapter-piece-seapress/vg-452995
http://products.worldwidemetric.com...ess-adapters-adapter-piece-seapress/vg-452995
JMSiragusa
Gold Level Sponsor
Just installed new offy manifold. Removed the old fitting and it threads very loosely. So going to try Dan’s alternative above. Let everyone know how it works. Thank you Dan, not sure if I would have found this specific help anywhere else.
JMSiragusa
Gold Level Sponsor
Not sure if anyone else had the following experience with this fitting. The hex part butted against a curve in the casting of the Offy manifold. The contact prevented the fitting from being threaded all the way in. So a bit of filing with a hand file was needed to "square" this corner. I was able to reuse the old fitting. Below are a few pictures. The first is the squared corner, the second is with the fitting installed. I thought I would share in case anyone else has this experience.
Attachments
belmateo
Gold Level Sponsor
DanR
You can see that the 1.5 does not line up with those threads. The diameter is probably close but not exactly 22mm.
belmateo
Gold Level Sponsor
DanR
Diamond Level Sponsor
This is where I insert the Temp Sender Unit.
And Yes, I did have to grind a flat area of the OFY in order to get the upper by pass hose to slip on.
DanR
Diamond Level Sponsor
Unless it is 22mm it will destroy the threads in the OFY Manifold.
DanR
Diamond Level Sponsor
Don, I don't understand the description used by the Vendor? I can't get a breakout of the vendors codes?
Thread size: P x MRp
Dimension 22 x R3/4
The Home page does say Metric - Part Number VG-452971
And it looks like you have to purchase 4 each
husky drvr
Platinum Level Sponsor
Dan,
I had the same trouble. I posted it so if someone was curious, they could contact the vendor for clarification. I know, being a copper-nickle marine fitting, it will be costly - whether one or four. I'm surprised no one has inquired at Offenhauser about the design specs for the thread.
DanR
Diamond Level Sponsor
I took the liberty about 4 years ago.... They said metric 22mm 1.5 with the end for the top of the by-pass hose 20mm dia (3/4").
And we had a good discussion on some other threads/bolts/gaskets. design etc., etc....
Remember my POST on the 4 metric bolts to secure the bottom of the OFY to the block ? Three of the bolts are 10mm longer than the fourth needed. They can be put in the wrong position and you WILL Get a leak!!
husky drvr
Platinum Level Sponsor
Sorry, I stand corrected. I do recall the discussion about the four bolts, just not about this adaptor. That's not surprising, all things considered.