'88 740 SE Exhaust compatability

[xtDANIELODONNELLx]

My exhaust has seen better days, I think to a point where I'm going to replace everything from the downpipe to the rear box. My model has no cat and it's proving difficult enough to find the right pre silencer for it. I noticed the middle silencer of the 2.4 diesel model looks similar just with a much longer pipe on the front end that looks like it bolts onto the flange fitting of the downpipe. I'm wondering if it would be possible to install one of them on my 2.3 B230k model essentially deleting the pre silencer, but I'm not sure if this is possible or if the middle silencer will sit where it needs to be mounted correctly; so the connector to the backbox clears the rear axle properly.

Any thoughts? Am I being stupid? Or is this a viable option? cheers!

**NB** - If anyone knows the bolt size to fit the downpipe to the manifold that'd be a big help too, might as well replace them for new ones while I'm at it, thanks.

[xtDANIELODONNELLx]

Basically I'm asking if it seems viable to replace VOL3016 and VOL3001 in the diagram pictured to the photo pictures, which is for an 86 - 87 740 diesel

[Laird Scooby]

It probably could be made to fit but you might find the front pipes are a different diameter on the diseasel.

Can you clarify the year and engine code, whether manual or auto and saloon or estate please? From the info i found in your post and guessing it's an estate, i've found this as being the correct system for your car :



The most obvious differences are the pipe sizes on the diseasel one you've found - they need 60mm clamps instead of 54mm clamps!

Ebay should reveal sources of the right bits if you type in the various Klarius part numbers such as VO132K etc.

[xtDANIELODONNELLx]

Hi Dave!

You're teaching me everything on this site by the looks of things! It's a 1988 SE with a B230K and it's the estate model, manual transmission.

Cheers,
Billy

[Laird Scooby]

Originally Posted by xtDANIELODONNELLx

Hi Dave!

You're teaching me everything on this site by the looks of things! It's a 1988 SE with a B230K and it's the estate model.

Cheers,
Billy

You're welcome Billy, looks like i guessed right with the system you should have fitted, however a quick visual check underneath should confirm it.

However someone may have changed what it should have to a "mix'n'match" system so if it looks different, either order all the parts listed in that pictogram or double check exactly what should be on there.

That was the only listing i could find for the B230K for up to 1988 and none after, they did change exhausts slightly in 1988 or at least did on the B230E so i've always looked at it as a changeover year and had to double check things.

[xtDANIELODONNELLx]

Thanks a lot Dave!

It does look like that system underneath, but the hangers on the rear box kept snapping off and the middle silencer looked like there was inventive welding. Also the flange is missing at the front and replaced with a connector tube from the downpipe to the front silencer. My worry was that one of the previous owners or their mechanic was having similar trouble to me finding the correct silencer and had to make do with what they could get. But I guess they were just repairing holes instead of replacing the parts.

I really appreciate all your advice and help. I'm going to get the parts I need ordered here today.