289 to 302 engine swap

C

cheshireccat

Banned

Jan 11, 2004

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San Diego, Ca

Mar 22, 2004

#1

• Mar 22, 2004

• #1

I killed my 289, not my fault, but anyway, I ordered a 302 custom made for me, pretty nice, what is common between the two, what can I switch over and does anyone know a site I can find the info, do I need a new bell housing or anything of the sort? It should fit my C4 with no problem, but is there anything else that needs to be changed out. Help I need....

 

6Stang7

New Member

Jun 1, 2003

1,470

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Livermore, CA

Mar 22, 2004

#2

• Mar 22, 2004

• #2

Everything will mount up the same. The 289 and 302 are, for the most part, identical engines.

-Shaun

 

2nd Mustang

Founding Member

Feb 24, 2002

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46

Southern California

Mar 23, 2004

#3

• Mar 23, 2004

• #3

Oh boy, it was a long time ago, but I think the water pump mounting holes didn't match and my clutch bell housing had to be changed, different bolt pattern to the block, but then again, I am old!

 

6Stang7

New Member

Jun 1, 2003

1,470

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Livermore, CA

Mar 23, 2004

#4

• Mar 23, 2004

• #4

No, I know the bellhousing to engine bolt pattern is the same, as I use to have 3 speed on my 302. The water pump might be true, but I am not sure.

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

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south louisiana

Mar 23, 2004

#5

• Mar 23, 2004

• #5

The only difference between a 67 289 block and a later ( depending on how much later) 302/5.0 block, are the 78-up 302's lack the clutch pivot hole, and the 82-up have an dipstick hole in the lower left side of the block. All other bolt holes are the same. You will need to also check to see what balance factor the 302 is built for ( 28oz vs 50 oz)

 

ashford

Member

Dec 19, 2003

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fargo ND

Mar 23, 2004

#6

• Mar 23, 2004

• #6

one more thing you cant use the 289 fuel pump eccentric in a 302 timing chain cover youll need a 2 piece.

 

jst6

Founding Member

Jan 9, 2002

152

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Tucson, AZ

Mar 23, 2004

#7

• Mar 23, 2004

• #7

all you need to do is swap the torque converter from the 24 spline to a 26 spline unit and you shoule be all set, at least that's what i've read.

 

gbarber

Member

Jan 26, 2004

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delaware, ohio

Mar 23, 2004

#8

• Mar 23, 2004

• #8

The newer blocks also have some of the coolant holes, that lead to the heads, in a different location. If you are also using newer heads it won't matter.

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

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south louisiana

Mar 23, 2004

#9

• Mar 23, 2004

• #9

jst6 said:

all you need to do is swap the torque converter from the 24 spline to a 26 spline unit and you shoule be all set, at least that's what i've read.

Click to expand...

Sorry, but what you've read is wrong. The spline count for the torque converter has no bearing on a 289-302 swap. Also a 289 fuel pump eccentric will fit inside a 302 timing cover, the difference between a 2 piece and one piece eccentric, is the 2 piece has it's own tab to engage the cam, the 2 piece needs a long pin thru the timing gear to drive it.

 

ashford

Member

Dec 19, 2003

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fargo ND

Mar 24, 2004

#10

• Mar 24, 2004

• #10

D.Hearne said:

Sorry, but what you've read is wrong. The spline count for the torque converter has no bearing on a 289-302 swap. Also a 289 fuel pump eccentric will fit inside a 302 timing cover, the difference between a 2 piece and one piece eccentric, is the 2 piece has it's own tab to engage the cam, the 2 piece needs a long pin thru the timing gear to drive it.

Click to expand...

i put the lonnger pin in a cam by accident so i used the one piece pump eccentric it rubbed and the aluminum shavings got past the oil filter and ruined the bearings

 

G

geegee

Founding Member

Oct 21, 2000

2,015

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near Oklahoma City, OK

Mar 24, 2004

#11

• Mar 24, 2004

• #11

ashford said:

i put the lonnger pin in a cam by accident so i used the one piece pump eccentric it rubbed and the aluminum shavings got past the oil filter and ruined the bearings

Click to expand...

There are two one piece eccentrics. One is thinner than the other elsewise the same. The two piece has a tab for engaging the timing gear without need for a pin.

Check clearance by looking in fuel pump boss before putting in fuel pump. The eccentric is easy to see and if it bumps the cover, this is the time to discover it and not after the engine is started. You can also use a piece of clay to examine the clearance if the timing cover is not yet installed.

5.0L engine uses block pins to align the late timing cover. If installing the early timing cover, these pins need to be removed from the 5.0L block. Align cover using crankshaft and fit the harmonic temporarily. Let the timing cover float on the harmonic then insert and tighten appropriate timing cover bolts. This will give a good alignment on the crankshaft seal helping to ensure against future oil leakage. More important because you'll likely be using 5w-30 oil.