Can anyone tell me the size of the 4 bolts from the y pipe to manifold? I need to get some replacements before I go home this weekend to do some work on the truck.
Y Pipe To Manifold Bolt Size
- Thread starter bronc
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On a 2.9, 4.0 and 3.0 the Ypipe-to-manifold bolts are 12mmX1.75 thread, not sure about the length.
the one problem with hardware or autoparts bolts is that they have a larger hex size than the factory ford bolts, typically the aftermarket bolts will have a fat 19mm head.
the Factory ford bolts have a 15mm integral washer type head.
I've used 3.0 bellhousing bolts for this task in the past.
These are usually easy to find UNDERNEATH a ford taurus
in the junkyard that SOMEONE ELSE has pulled the transmission out of.
(why work if you don't have to?)
AD
the one problem with hardware or autoparts bolts is that they have a larger hex size than the factory ford bolts, typically the aftermarket bolts will have a fat 19mm head.
the Factory ford bolts have a 15mm integral washer type head.
I've used 3.0 bellhousing bolts for this task in the past.
These are usually easy to find UNDERNEATH a ford taurus
in the junkyard that SOMEONE ELSE has pulled the transmission out of.
(why work if you don't have to?)
AD
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I recall the heads of my 2.9l bolts being 18mm, on my 4.0l the only socket I could get to fit was 9/16", and on my 3.0l 15mm was spot on. All factory bolts.
Yea see I had bought some bolts when I did the swap, they weren't threaded all the way to the head. I had them all bottomed out and there was still a slight exhaust leak. I could not find bolts threaded all the way when I looked this week. So I got some from Ford, they must have some gold in them or something though. 45 bucks for 4 bolts... But they worked. They 12 mm, not sure on the pitch but your likely right at 1.75. And the head is 15 mm and about 2 inches long.
But problem solved anyway. Thanks.
But problem solved anyway. Thanks.
- Joined
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On my 4.0 I'm not using the stock bolts.
I have Borla Headers and the holes in the header flanger are smaller
than stock, But I didn't like the Borla hardware either, So I'm using Surplus 4.0 Bellhousing bolts (10mmX1.50) with 10mm Flag Nuts.
If I ever have a problem I can just cut them off and replace them because the only thing they are threaded into is the nuts.
AD
I have Borla Headers and the holes in the header flanger are smaller
than stock, But I didn't like the Borla hardware either, So I'm using Surplus 4.0 Bellhousing bolts (10mmX1.50) with 10mm Flag Nuts.
If I ever have a problem I can just cut them off and replace them because the only thing they are threaded into is the nuts.
AD
Yea, that's one thing I would like about using smaller bolts with a nut and a washer is that you can cut them and no harm done.
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