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B23FT swap into a 1991 740

I probably should follow this because I have a B23 block I plan on building and slapping into my POS 91 740 sometime in the future. Right now chasing electric issues and planning on what to do with transmission and rear end.
 
2manyturbos said:
You will need to swap the ECT sensor for the 2.4 sensor and possibly, the knock sensor. That is such an early engine I don't know what Volvo was using for the knock sensor then. That engine might even have a single terminal sensor for the temperature gage. I would just swap the entire intake manifold with injectors and fuel rail and throttle body/TPS. Also, the IAC valve and hoses. Of course, you will use the 1991 engine harness. You will need a long coil wire to reach the block mount distributor.
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Knock sensor is the type used with EZK ignition. Did this exact swap on an '87 744Ti in 2003. Difference is that I decided to use the B21/23 accessory brackets (and, since the AC was deader than a doornail, went non-AC), so did have to do some modifications to the B230FT harness to account for the alternator being on the passenger side, but the knock sensor that was already on the 119K mile longblock was plug 'n play.
 
I removed the engine from the trunk of my 744. I rinsed off all the dirt, leaves, and rat dropping from sitting in a barn since 1989.

Then I used diluted Spray 9 degreaser and my $15 degreaser spray wand and did the whole engine. Rinse again, dry in the sun, and then soaked the assembly in WD40.

The engine turns by hand on the crank pulley, but I removed the spark plugs and poured ATF into each cylinder to lube, clean, and hopefully help the rings free up.
 
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What set of spark plug wires can I get that will have a king lead long enough to reach from the coil to the distributor?
 
^Thank you.

So I tore down the engine and was happy with what I found inside. The cylinder walls look fine, the head looks great, no corroded coolant passages, and a nice tan/gold color to all the internals. I plan to reseal it and then drop it in.

BlockInvertedBench.jpgBore.jpgMahlePiston.jpgRodsResized.jpgValve.jpg
 
So should I pull the pistons and clean the carbon out of the grooves and install new rings? Or maybe just re-use the old ones?

I have an old piston here on my desk from a B234F and the rings have been removed. There is a lot of nasty build up on the pistons even after a parts wash bath.
 
I think I just ordered the wrong set of rings.

1.75 X 2 X 4mm is the correct for B23FT?

I just ordered a set of:
1.75 mm; 2nd Groove: 1.75 mm; 1st Oil Groove:3.50 mm
 
ZVOLV said:
So should I pull the pistons and clean the carbon out of the grooves and install new rings? Or maybe just re-use the old ones?

I have an old piston here on my desk from a B234F and the rings have been removed. There is a lot of nasty build up on the pistons even after a parts wash bath.
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Just send it as is...that's the point of getting a low-milage motor, so you don't have to take it apart. ;)
 
I have had no luck finding spark plug wires with a long king lead that will reach the coil on the passenger side strut tower.

I bought a set for AC Delco from RockAuto for 1984 760 Turbo. It came with two king leads, one is long enough, but I think its for a Regina car. It has a clip on one end, but it doens't snap onto the coil I have.

John242Ti said:
The set for a 1978-80 240.
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I have searched using this parameter and I have had no luck.

I measured the distance from the coil to the block mount dist location. I came up with about 30 inches. I may just make my own king lead from a kit.
 
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So the 740 Denso kit has one long king lead with that "two fingered" clip at one end. I don't know what that end clips to (240 coil)?

I may just snip that "clip" end off and crimp on another terminal.

I found that the 740 B230 alt/Ac bracket just uses 3 bolts to secure it to the block. It doesn't use the 4th threaded hole. I think the 3 bolt B230 pattern should work on the B23FT.
 
ZVOLV said:
I have had no luck finding spark plug wires with a long king lead that will reach the coil on the passenger side strut tower.

I bought a set for AC Delco from RockAuto for 1984 760 Turbo. It came with two king leads, one is long enough, but I think its for a Regina car. It has a clip on one end, but it doens't snap onto the coil I have.


I have searched using this parameter and I have had no luck.

I measured the distance from the coil to the block mount dist location. I came up with about 30 inches. I may just make my own king lead from a kit.
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Hmmm, sounds like it's actually a kit for a 1993-95 940, even though the coil on those cars is mounted to the driver's strut tower, like the B23FT coil.

Volvo Ignition Wire Set - Bougicord 272194

Volvo Ignition Wire Set - Bougicord 272194
www.fcpeuro.com

That's one that's used with the 240 series, 1984 760, and 1993-95 940.

Volvo Spark Plug Wire Set (242 244 245) - STI 272193

Volvo Spark Plug Wire Set (242 244 245) - STI 272193
www.fcpeuro.com

Here's another kit that does not mention the 1993-95 940. It won't work with your coil, since it's designed for the non-700 series coils without the center stud that the standard style terminal clamps onto. It also won't work with the 1993 VW Golf 8-valve distributor cap that happens to work in place of the 056 cap that Volvo uses on block mount Bosch distributors from 1974-1995.
 
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