What is this hole?
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Joined: Nov 2011
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What is this hole?
I have an 85 F250 with the 4.9L In line 6 cyl. 302. I was recently driving at hiway speeds when it started to feel like I had an exhaust leak. The engine ran rough, I lost a little power at low RPMs, and it also sounded like an exhaust leak.
When I started to take things apart to replace the exhaust and intake manifold gasket, I noticed a hole on the front side of the manifold near where it bends to meet the exhaust pipe. This hole is not threaded and is a clean cut round hole, but I cannot figure out what used to be in it. When I cover the hole, all the problems cease.
What goes in there? is it important?
Thanks.
Jesse
When I started to take things apart to replace the exhaust and intake manifold gasket, I noticed a hole on the front side of the manifold near where it bends to meet the exhaust pipe. This hole is not threaded and is a clean cut round hole, but I cannot figure out what used to be in it. When I cover the hole, all the problems cease.
What goes in there? is it important?
Thanks.
Jesse
More Turbo
Joined: Nov 2004
Posts: 725
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From: Western Canada
I take it that you mean you have the 302 not the 6 cyl. and being a 85 it would be carbed, so that hole you mention is more than likely for a heat rise tube to the carb for your choke.
4.9L = 300 c.i.
5.0L = 302 c.i.
Hope this helps.
4.9L = 300 c.i.
5.0L = 302 c.i.
Hope this helps.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
E4TZ-9D477-A .. Tube-EGR Valve to Exhaust Manifold / Obsolete
FORD PARTS ONLY in Bayamon Puerto Rico has ONE = 787-786-9180 / No other Ford Dealer or obsolete parts vendor has any.
-------------------------------------------------------------------------------------------------------------------------
2) 387285-S36 .. Connector Fitting-EGR Tube to Exhaust Manifold and to EGR Spacer Plate / Obsolete
3/4" -14 male pipe thread / 1 13/16" female pipe thread / 7/8" tube.
Dozens are available NOS from Ford Dealers/obsolete parts vendors.
Logistics Pro
Joined: Jan 2007
Posts: 3,827
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From: Martinsburg, WV
[quote=85RanchTruck;11079497 I noticed a hole on the front side of the manifold near where it bends to meet the exhaust pipe. This hole is not threaded and is a clean cut round hole, Jesse[/quote]
If the threads are gone, then you will need a replacement manifold, then you can plug it off.
If the threads are gone, then you will need a replacement manifold, then you can plug it off.
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Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
If you do a mathmatical problem, technically you are both correct as the 300 AND 302 CID averages out to 4.9L. Ford called the 302 a 5.0L to eliminate confusion.
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