Engine IDentification

Cskit1500 · December 3rd, 2006, 10:21 PM

A few questions, how exactly can you tell a 302 and a 351w apart? I know the deck heights are a little bit different with the 351 being like 9.5 or so, but is there any other tale tale signs without removing the valve cover? Because a 351 will ahve it engraved in the valley.

Also will a 302 double sump oil pan fit the 351?

Thanks

Chuck

Modified88Dreamer · December 3rd, 2006, 11:37 PM

Depending on when the engine/vehicle was built, another way to tell the 351W apart from the 289/302 in most cases is the number of intake manifold to cylinder head bolts. The 289/302 has 12, the early 351W (pre 1976) has 16. Other differences between these similar looking engines are main bearing diameters 289/302s measure 2.25 inches, 351Ws are 3 inches slightly larger. Rod journals measure 2.12 inches compared to 2.31 inches, and the fact that the 351W uses a longer connecting rod 5.95 inches compared to 5.15 inches for the 289 and 5.09 inches for the 302. Hope that helps!

1slo5.0 · December 4th, 2006, 02:06 AM

The intake on a 351W is noticeably wider than a 302. Block casting numbers will tell you too. 302 oil pans will not work on 351Ws.

December 3rd, 2006, 10:21 PM	#1
Cskit1500 Newbie Join Date: Nov 2006 Posts: 15	Engine IDentification A few questions, how exactly can you tell a 302 and a 351w apart? I know the deck heights are a little bit different with the 351 being like 9.5 or so, but is there any other tale tale signs without removing the valve cover? Because a 351 will ahve it engraved in the valley. Also will a 302 double sump oil pan fit the 351? Thanks Chuck

December 3rd, 2006, 11:37 PM	#2
Modified88Dreamer Enthusiast 1988 Mustang GT N/A Join Date: Nov 2006 Location: Florida Posts: 632	Depending on when the engine/vehicle was built, another way to tell the 351W apart from the 289/302 in most cases is the number of intake manifold to cylinder head bolts. The 289/302 has 12, the early 351W (pre 1976) has 16. Other differences between these similar looking engines are main bearing diameters 289/302s measure 2.25 inches, 351Ws are 3 inches slightly larger. Rod journals measure 2.12 inches compared to 2.31 inches, and the fact that the 351W uses a longer connecting rod 5.95 inches compared to 5.15 inches for the 289 and 5.09 inches for the 302. Hope that helps! __________________ "I know that son-of-a-bitch is cheatin! Cause, I'm cheatin and he beat me"!

December 4th, 2006, 02:06 AM	#3
1slo5.0 Zippee is my step sister. 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 10,353	The intake on a 351W is noticeably wider than a 302. Block casting numbers will tell you too. 302 oil pans will not work on 351Ws. __________________ Thanks to: Trick Flow, Team Z Motorsports, Total Engine Airflow and Furo Racecraft My daily driver has 16 cylinders and 4400hp @ 1000 rpm....

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