Volvo S40 The S40 is Volvo's most affordable sedan with all the amenities of a luxury sports car.

2003 S40 Crossmember upside down?

Old Oct 28, 2015 | 11:12 AM
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Default 2003 S40 Crossmember upside down?

I recently replaced the lower engine mounts on my 2003 S40, the 2 that connect to the wide beam that runs down the middle under the engine.


To get that beam off you first have to remove the crossmember (PN: 30883224). I think I may have put it back on upside down but I can't find any images online of which way it is suppose to go.


It can go on with the U's at the ends facing down, which has the crossmember contacting the beam, or with the U's facing up that puts an inch or so gap between it and the beam.


Anyone know which way is correct?


Thanks,


Jeremy
 
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Old Oct 28, 2015 | 12:09 PM
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It should not touch the beam but should sit flat where it mounts.
 
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Old Oct 28, 2015 | 03:51 PM
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put differently, "U" should be upside down.
 
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Old Oct 28, 2015 | 08:54 PM
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My V40 has the cross member fixed flat face up which leaves about a 10mm clearance from the central sub frame.
The end bolting on points are flattened to gain a flat face for the bolted connections each side.
 
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Old Oct 29, 2015 | 11:47 PM
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Originally Posted by Livens
It can go on with the U's at the ends facing down, which has the crossmember contacting the beam, or with the U's facing up that puts an inch or so gap between it and the beam.
I just did this today.

Us upside down. It did not occur to me you might install it the other way as Us upside down is the only way you get metal to metal contact between the crossmember and its mounting points.

With something like this the witness marks on the part will almost always tell you which way to install it. In this case circles for bolts/washers and rectangles for the mounting points.

If your crossmember is contacting the beam you have some other problem as there should be a small gap.

It ticked me off that the lower front mount had a way oversized mounting hole - 10 mm bolt in a 16 mm hole. I'm sure this was intentional but I hated it anyway, so I sourced some 16 x 10 metric bronze bushings to center the bolt. I have two extra - enough for one engine mount - if anyone wants them.
 

Last edited by migbro; Oct 29, 2015 at 11:53 PM.
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Old Oct 30, 2015 | 09:44 AM
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Originally Posted by migbro
I just did this today.

Us upside down. It did not occur to me you might install it the other way as Us upside down is the only way you get metal to metal contact between the crossmember and its mounting points.

With something like this the witness marks on the part will almost always tell you which way to install it. In this case circles for bolts/washers and rectangles for the mounting points.

If your crossmember is contacting the beam you have some other problem as there should be a small gap.

It ticked me off that the lower front mount had a way oversized mounting hole - 10 mm bolt in a 16 mm hole. I'm sure this was intentional but I hated it anyway, so I sourced some 16 x 10 metric bronze bushings to center the bolt. I have two extra - enough for one engine mount - if anyone wants them.

I definitely have it on upside down, but it fit fine that way and the U's even fit over the mounting spot perfectly... Ill get some pics when it dries out. For now it seems fine, no funny noises


Migbro,


Are you referring to the bolt that goes through the front lower engine mount? Yeah, I noticed too that the hole was lot bigger than the bolt leaving room for things to flop around. I just tightened the crap out of it to pinch the mount's bushing in there tight. And if you're offering I'll take em
 
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Old Oct 30, 2015 | 10:47 AM
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Originally Posted by Livens
Are you referring to the bolt that goes through the front lower engine mount? Yeah, I noticed too that the hole was lot bigger than the bolt leaving room for things to flop around. I just tightened the crap out of it to pinch the mount's bushing in there tight. And if you're offering I'll take em
PM me your mailing address and I'll send them first class package - on my dime of course.

Also, IIRC the two mounting bolts at each end of the beam are different lengths. If you installed those bolts at the wrong end of the beam they might bottom out making the beam sit lower. Though that would show up in the uncompressed rubber bushings I guess.

I also replaced the two steel bushings at the rear end of the beam as they were totally rusted. 40 bucks for two steel bushings.
 

Last edited by migbro; Oct 30, 2015 at 10:53 AM.
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