351W/302 differences
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Mountain Pass
Joined: Apr 2007
Posts: 237
Likes: 2
From: St. Paul, MN
351W/302 differences
Gents,
What's the easiest way to tell a 351W from a 302 when installed in an '87 F150? Got a mystery truck that I picked up and the kid who owned it said it was a 351, but it sure looks like a 302 to me. Doesn't make a difference to me, just trying to clear it up.Thanks,
What's the easiest way to tell a 351W from a 302 when installed in an '87 F150? Got a mystery truck that I picked up and the kid who owned it said it was a 351, but it sure looks like a 302 to me. Doesn't make a difference to me, just trying to clear it up.Thanks,
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by rattosh51
Gents,
What's the easiest way to tell a 351W from a 302 when installed in an '87 F150? Got a mystery truck that I picked up and the kid who owned it said it was a 351, but it sure looks like a 302 to me. Doesn't make a difference to me, just trying to clear it up.Thanks,
What's the easiest way to tell a 351W from a 302 when installed in an '87 F150? Got a mystery truck that I picked up and the kid who owned it said it was a 351, but it sure looks like a 302 to me. Doesn't make a difference to me, just trying to clear it up.Thanks,
1987: H = 351W / N = 302
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
what shape are the runners on the upper intake. a 302 has square looking runners while the 5.8 has round runners. 351w became efi in 88 but any efi 5.8 could be swapped into a previous efi 5.0 equipped bronco/truck. does the egr tube come from the passenger side manifold up to the upper intake/throttlebody area or does the egr tube come from under the upper intake then up to the throttlebody area??
Last edited by Kemicalburns; Aug 3, 2007 at 03:24 PM.
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
^ not all of them were. The earlier EFI 302 and 351 both had Ford Electronic Fuel Injection cast into them instead of the engine size. The later models had either 5.0 or 5.8 cast in.
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Hotshot
Joined: May 2003
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From: south louisiana
Originally Posted by EPNCSU2006
^ not all of them were. The earlier EFI 302 and 351 both had Ford Electronic Fuel Injection cast into them instead of the engine size. The later models had either 5.0 or 5.8 cast in.
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Posting Guru
Joined: Oct 2003
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From: Quesnel, BC, Canada
easiest way to tell is to look where the dizzy clamp is, if the block deck that it (the dizzy clamp bolt) threads into is flush with the bottom of the intake then its a 302 like kemicalburns said. On a 351w theres a definate difference in elevation between the two..something like 1.25"
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Mountain Pass
Joined: Apr 2007
Posts: 237
Likes: 2
From: St. Paul, MN
OK, the egr comes from under the upper intake, up to the throttle body, and yes
it does have the plain "Ford Electronic Fuel Injection" casted on it. The dizzy does look to be elevated from what I can see...so 351W after all?
it does have the plain "Ford Electronic Fuel Injection" casted on it. The dizzy does look to be elevated from what I can see...so 351W after all?
Posting Guru
Joined: Sep 2005
Posts: 2,238
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From: Kiefer, Northeastern Okla
The ports entering the front of the block from the water pump on a 302 are right up against the deck, down about an 1 1/2" on the 351. 
Someone should make these into a sticky.
Pete
Someone should make these into a sticky.
Pete
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