Mating engine to gear box Topic is solved

Volvoblackdog · Post by **Volvoblackdog** » 10 Aug 2020, 23:07

I have a 2001 volvo S40. A year ago I overheated the engine and went down and got a used engine with low miles to replace. I have taken the engine out and scraped it already as it was seized. I have attempted to mate the trans to the engine twice now with no avail. It seems that when I get the bolts even just snug, the engine will not turn over and I can see that the flywheel is compressed to the engine and will not turn. I don't know what I am doing wrong as it seems the gear box and engine are aligned. Any help is appreciated. I am just a shade tree mechanic and just want to put my car back together. Also the engine does turn when the trans is not attached.

BTW. I have the engine and trans out of the car at the moment as I thought that it would be easier to mate the two outside the car.

Thanks

Volvoblackdog · Post by **Volvoblackdog** » 13 Aug 2020, 08:42

Just to add to the above, I wonder if anyone has an idea how to check if my motor that I bought is compatible with my gear box.

Thanks again.

Post by **abscate** » 15 Aug 2020, 06:21

Can you try removing the pressure plate and clutch and seeing if the engine turns then?

Did you match the correct flywheel, single or dual mass , with the plate and disc?

I’m not an expert here , just offering suggestions

Post by **jimmy57** » 15 Aug 2020, 07:20

It is an auto trans, that was the only way the 2000-2004 S40/V40 came in the North American market. Did the flywheel (flex plate) come off and re-installed? it could be reversed. Is there a bushing on the centering pilot on the torque converter and one still in the end of the crankshaft on the engine? I can't remember if there was a spacer between crank and flex plate but there is a stamped steel washer plate on top of flex plate that the bolts would tighten down on.There were no differences in the 2000-20004 engine bolt pattern, crankshaft length or torque converters. 2000 was a 4 speed and 2001-2004 were 5 speeds but there was no differences in engine or flywheel. I think the torque converter is the same part number too.

Volvoblackdog · Post by **Volvoblackdog** » 15 Aug 2020, 10:29

Thanks to all that have replied. I did not remove the flywheel so I assume that the recycle company did not remove it as well but you never know. It looked like the engine that I removed and I did not take the other flywheel off of my old engine but now I think that I should have. I will check if there is bushing on the centering pilot on the torque converter. Perhaps that Is the thing I'm missing however I dont know why the bell housing seems to be cinching down on the flywheel when I bolt the gear box to the engine. This is indeed an auto transmission and I believe in the 5 speed. Now that I have the Trans and engine out of the car, I took the torque converter off the flywheel and slid it into the trans. and it fits fine as I thought it would due to the fact that this came off the original engine and original gear box. I was thinking that if I try to bolt it to the engine this way, would it be possible then to install the torque converter to the flywheel after mating the gear box? Just a thought. If so how would I turn the torque converter to get all the bolts installed and torqued down.

Thanks again

Post by **jimmy57** » 15 Aug 2020, 10:45

OK, the other thing that should be checked is torque converter depth from face of trans bell housing. The torque converter may have come out and is no longer splined to stator support or drive lugs to trans pump. I forget which one splies up last as the TC is inserted. Measure the plane of the TC bolt holes the the bell housing contact face on engine. The TC should be deeper if pushed till it stops than the projection of flywheel above block bell housing face. The TC gets pull out 3-5 mm, maybe even a little more, from that deepest insertion to the flywheel bolt up plane. If it is found that TC is not deep enough then lift it by centering hub while turning and pushing gently to get it to go on that last spline set.

Volvoblackdog · Post by **Volvoblackdog** » 15 Aug 2020, 12:20

This is the same torque converter that was installed in the vehicle in 2001. would it be a good Idea to install with TC altready in the gear box then install the bolts? just thinking out of the box. Side note. Im doing this on the cheap and dont have a hoist. I am aligning the gear box by eye and not using a Trans jack. I may not be getting the splines lined up when bolting it up. I am turning over the motor by hand while slowly bringing the gear box together but it gets to a point when the flywheel rubs against the bell housing.

Post by **alschnertz** » 19 Aug 2020, 14:52

Volvoblackdog wrote: ↑15 Aug 2020, 12:20would it be a good Idea to install with TC altready in the gear box then install the bolts? just thinking out of the box. Side note. Im doing this on the cheap and dont have a hoist. I am aligning the gear box by eye and not using a Trans jack. I may not be getting the splines lined up when bolting it up. I am turning over the motor by hand while slowly bringing the gear box together but it gets to a point when the flywheel rubs against the bell housing.

Late to the party, but when I replaced the trans. on my '01 five years ago, I had the TC installed in the transmission and aligned the flywheel bolts after it was mated to the engine. It was my first automatic transmission removal / re-installation and I don't recall it being difficult to align that way. But I was using either a transmission lift or an engine hoist from above (I just don't remember).

Edit: My engine was still installed in the car.

Volvoblackdog · Post by **Volvoblackdog** » 05 Sep 2020, 15:12

Thanks for all the great replies and confidence. Got the job done and have the engine in the car now wiring it up and installing all the stuff I took off my other engine. Thanks again.