I have a friend who is trying to resurrect a 91 740 with using an engine from an 85 240. He has done the complete engine swap but cannot get the car to start. Both starters have been tested and they are good. The starters engage but will not turn the engine. The engine can be turned over with a rachet. My friend is stumped and tired. Any ideas of what I can tell him? Thanks, George

My friend has come by with the actual flywheel. Which way does the arrow on the flywheel go in order for the timing to be correct? And thanks again. He is so close to getting this one back on the road. George

I hope your friend can see this, as a description might be hard.
I aplogize for the huge 2nd picture but that's how it copied from the FAQ page (url below).

The following picture is from 700/900 FAQ at
http://www.brickboard.com/RWDvolvo1296792/220/240/260/280engine_swap_240_740_start.html
(LINK)
Although it is NOT a Regina flywheel (not even a tone ring), I think the reference "arrow" applies to both LH and Regina.

Note the 2 white dots at the top of the flywheel, relative to the white arrow. When the arrow is at "12:00" (at #1TDC) as the label says,
the white dots will be at "9:00".



Keeping that 9:00 position in mind, look at the picture below, which DOES show a tone ring, with its square holes.
The "triggering" spot is where one hole has been omitted, leaving a solid blank space (shift picture to center the tone ring).
Notice that "solid" spot is at "3:00" relative to the Arrow at "12:00" when crankshaft is set to #1 TDC (compression stroke).


I believe this picture above is an LH tone ring, but the Regina is described as being the same
except for a second solid blank spot that is 180° opposite.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

Thanks. That's a great picture. I printed it out to him and he is on it. I will give another update - hopefully it will be running this time. Thanks to all.

I did this same swap in reverse last summer. I put a low milage motor from a 91 740 into a high milage 92 240. Aside from motor mounts,and relocating the distributor (I hope the camshaft is cut to accept the 740 distributor)the one very important step, is to swap flywheels so that you have one compatable to the bosch ignition (240). The one from the 740 is most likely set up for the Rex-Regina system, and will not work (the engine will act like it is badly out of time).
Poorgie

My friend got it started but said it had "jumped time." So from what I am reading from all of these excellent and encouraging posts is that it could be a case of using the wrong flywheel. He did get the Regina coil into the back of the cylinder head. I guess this is where the confusion is. Should he use the Bosch or Regina flywheel? Thanks, George

Hey George,

I recently swapped an 86 B230F into an 88 765 with no issues since the fuel systems were similar. If your friend kept the original Regina system on the 740, he should have used the 740 flywheel. He could have the flywheel out of position as Bruce said, in which case it will need to be rotated. You might tell him about the great FAQs database on this site to help prevent these kind of problems in the future.

Regards,
--
Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com, www.dallasprecision.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles

Can you please give me some counsel on how to rotate the flywheel to the correct position so that it would start? Thanks!

See my reply with photos from earlier this afternoon (above).

If you were registered here, you'd get automatic email copies of all replies. As it is, you need to scan the whole thread periodically for the latest responses.

Poorgie is close, but he's not describing the Regina flex plate or crank sensor tone ring.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

with the transmission off, and the engine rotated to the top dead center position for #1 cylinder, the two pins on the flywheel (they're actually on the front (engine) side of the flywheel, but you can easily notice where they are from the backside) will be in the vicinity of 2 o'clock as viewed from the back of the engine. The flywheel has been changed,right?
Poorgie

Thanks for all the replies. I will have my friend who is at work try to reply to your questions when he has the opportunity. But I do want to emphasize my thanks to the BB! I would love for him to keep them rolling!

One thing that I havn't seen mentioned is that on the 240 starters that were used on te 1985 models, there are two terminals on the starter solenoid. If he connected the starter signal wire to the wrong one, then you get nothing. These are the two small connectors on top of the solenoid. Try switching the connector. Also, if it's an automatic transmission model, check the neutral safety switch wire. It's easy to become pinched by the engine to bell housing, and also by the starter. This is the yellow/blue wire that tries to commit suicide by jumping between the starter and the block when you remove the starter.

Bill

If you can turn the engine with a ratchet and the starter is good, I'm betting that you either have a bad battery or a loose battery connection.

steve

Make sure the mega ground wire is connected between the engine block and the chassis, without that, all the starter can do is generate heat! NOTE: I'm not talking about the little strap between the head and the firewall, I'm talking about the big bad cable between the driver side engine mount area and the chassis.

jorrell
--
92 245 250K miles, IPD'd to the hilt, 06 XC70, 00 Eclipse custom Turbo setup...currently taking names and kicking reputations!

I didn't read carefully, and jumped to a conclusion based on previous engine swaps.

If you have other problems once the starter is working, the following may still be a valid comment.

"Unless the flywheels were swapped, the '85 flywheel (flexplate for AT) lacks the '91's "tone ring" for the Crank Position sensor. Or, if swapped, the flexplate/tone ring may not be positioned correctly on the crankshaft, throwing the timing way off."

Regarding he starter, you can try it from under the hood, by jumping battery 12V to the Service Socket, which connects to Starter terminal 50. (Via the Neutral Safety Switch if car has Auto Transmission.)


--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

Is the battery up to the task?

Has the replacement engine been running recently? You might try removing the plugs and squirting a couple of tablespoons of oil into each cylinder and then spin it with the starter to reduce the drag on the cylinder walls. This would also allow the oil pump to build pressure and push some oil into the system if it has been sitting for a while.

Randy

Randy,

Thanks for the reply.

The battery is up to par and the engine from the 240 was running well when pulled. Any other ideas?

George

Are saying that the starter solenoid is activating the starter enough to engage the pinion gear with the flywheel/flexplate, but doesn't have enough power to turn the engine over?
Randy