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Engine swap F23A4/F23A1

Old 09-11-2015, 08:51 AM
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Join Date: Sep 2015
Posts: 3
Default Engine swap F23A4/F23A1

Hey all....I have a 2000 with a F23A4 engine w/ a 5 speed manual. I am loosing about a qt of oil every 250/300 miles. Friend of mine owns a repair shop and did a leakage test and I have leakage beyond the rings.

At this point I am looking at a salvage engine for around $500. Couple questions....

1. are the F23A4 and F23A1 engines interchangeable?
2. I am relatively handy turning a wrench as long as I have some direction. Are there any good videos or step by step instructions to do the engine swap?

Just looking for some direction or any other suggestions.
Old 09-11-2015, 04:58 PM
JimBlake's Avatar
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Join Date: May 2006
Location: Wisconsin
Posts: 17,514

The ULEV engine (F23A4) also involves some substantial changes to PCM and wiring harnesses. It might be easier to take a F23A1 engine and "turn it into" an F23A4 by swapping over all sensors & using the F23A4 exhaust manifold.

The front exhaust sensor is very different. It's a wide-band O2 sensor rather than a "normal" O2 sensor.

Check part numbers for other sensors. Use some on-line parts dealer by checking the "EX" and then checking the "EX-ULEV" versions of the car. Also check the distributor, I really don't know if that's different.
Old 09-21-2015, 08:59 AM
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Join Date: Sep 2015
Posts: 3

I ended up buying a salvage F23a4 engine. My question is on the removal of the engine. I have a 5 speed manual transmission. Should I remove just the engine or both the engine and transmission? I am hoping to start on this tonight so I appreciate some quick feedback...Thanks !
Old 09-23-2015, 05:26 PM
poorman212's Avatar
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Join Date: May 2010
Location: Youngsville, NC
Posts: 11,819

To each their own.....me I would pull just the engine but that is me.
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