Compressor Bracket

[Mpgeslak]

Hi All,

I am looking to install an A/C system in my 1967 250SL.  The car has a replacement engine that was taken from a 1967 250SE.   Having read through the forum I have seen the Posts from Joe Alexander explaining the simplest installation for the Compressor is to use a Sedan Bracket which I was able to purchase.  Since the engine is from a 250SE it already has the temperature housing with the extended neck over Joe’s description. 

The problem I am having is I can’t seem to figure out how to mount the bracket, not sure if it isn’t the right bracket, the bottom portion of the temperature housing , or the hoses are run differently. 

I have attached photos of the engine and the bracket.  Any insights would be appreciated!

Thanks,

Michael

[Peter]

Hi Mpgeslak,

Or my jpeg viewer broke down or there is a problem with these files, looking to the size, it are the files.

^Peter

[dirkbalter]

I cant view them either. I think the files have issues.

[Mpgeslak]

Hi,

thanks for taking a look, I have uploaded different version of the photos, hopefully these work.

Thanks again,

Michael

[doitwright]

I hope these photos help. You are aware that an adapter compressor mounting bracket is used when using a rotary compressor such as the Sanden? You can see it in the last photo. If you did not get the crankshaft pulley off the sedan, you should be on the lookout for one of those also. Sedan cars equipped with AC such as the W108, have different pulley than a W113 that was retrofitted with AC although either should work. The W113 AC crank pulleys are hard to find and can be expensive when you do find one.

[Mpgeslak]

Thanks Frank for the photos, very helpful. 

From what I see in the last photo with the rotary compressor, the left side of the bracket attaches in a place where on my engine has an air hose connected to the intake manifold.   Do I need to re-route the hose to a different location?

Thanks for the additional information on the adapter bracket and the pulley. 

I haven’t yet purchased a kit or the components, but will have to purchase the adapter bracket. 

In terms of the pulley, attached is a photo of my current pulley. Given I have power steering I assume I need a pulley with 3 grooves like Joe shows in a post on this subject?

Thanks again for the help.

Michael

[Mpgeslak]

Hi All,

Anyone have additional thoughts on a way forward with mounting the bracket?   Best I can tell there seems to be a hose going to intake manifold where the bracket needs to be mounted.   Any help appreciated!!

Michael

[ja17]

You can re-fit the air idle screw to the other end of the manifold near the firewall. There is an hex plug which you can remove and then simply use all the same parts and screw the air screw assembly in the new location. Lastly use the hex plug to fill the original hole. You will need to run a longer air hose from the air screw back to the air cleaner.  This is a factory set-up on some of the M130 sedan and coupe engines. Save the sedan alternator bracket so you can use it below in the original configuration. You will need to use the belt tensioning rod also. I'll keep an eye on this string so keep posting. I am finishing-up one of these up grades in the shop right now.

[Mpgeslak]

Thanks Joe, I was hoping that would be the answer!

I didn't realise I needed the sedan alternator backet, I was aware I need the 3 groove crankshaft pulley from a sedan to make the setup work.   Any good source for these?

Thanks,

Michael

[ja17]

Usually one or two on ebay these days. A good price is anything less than $75.00. I'll take a look....

[ja17]

Good price Michael,
Better grab it..………

https://www.ebay.com/itm/Mercedes-Benz-M127-W111-W112-W108-W109-Alternator-Bracket-Mount/323989677392?hash=item4b6f4a2550:g:-MkAAOSw9fRd2SrB

[Tomnistuff]

Hi Michael,
Did you get my three emails with the Word document pages?
Moving the idle air valve to rhe rear and adding the rear bracket for your bracket is discussed and shown in the parts layout.
Tom Kizer

[Mpgeslak]

Thanks Joe, I purchased the Alternator bracket from the link you sent, much appreciated.    Any ideas on the pulley, I searched ebay using Mercedes W108, W109, W111, W112 Pulley but couldn't find anything with the right setup.  Do I also need the belt tensioning rod from the sedan?

Hi Tom, no I haven't seen the emails, just re-checked my email account including spam box.  I will re-send my email address in case I typed it wrong.

[ja17]

Michael, your 250SE sedan engine should already have one or both parts on it? The first groove is for the alternator belt, the second groove is for the AC belt and the outside groove is for the PS. The inside groove is part of the vibration dampner, the outer two pulleys nest inside of the dampner and when bolted together they form the three grooves needed. Your original pulley should separate and you replace the front part with the double pulley in the second web link below.

I am thinking your sedan engine already has this part on it?
https://www.ebay.com/itm/Mercedes-Benz-W108-280S-M130-Engine-Crankshaft-Vibration-Damper-Pulley-KK-33/224286950154?hash=item34388b430a:g:~hsAAOSwFj5f35nZ

You may need this part...….. Make him a lower offer, or look for one closer to you.
https://www.ebay.com/itm/Mercedes-W108-Crankshaft-pulley-250se-and-others/313219028517?hash=item48ed4f1625:g:TQwAAOSwWpFfYA6u

[Mpgeslak]

Hi Joe,

Thanks Joe.  Attached is a photo of my current Crank Pulley set up, if I understand correctly my current setup has the inside groove as part of the vibration damper, and then my PS pulley has one groove and the large spacer seen in the photo and I replace this second pulley with the new two groove pulley.  Is that Correct?

Also, from what I understand I will need a small bracket to attach to the air intake which then attaches to the AC bracket.  Is there a source for these or some other way to attach?

Thanks again,

Michael

[ja17]

Yes your front pulley and spacer remove as one part most likely.

Sedan AC brackets attach by three bolts, A large 22mm head bolt (M10 metric fine thread) where the injection line holder is in the front of the cylinder head. The second is also in the front of the head, and uses a 17mm hex head bolt (M8) and the last is on the side at the intake manifold. At some point in time the factory provided a drilled and threaded hole on all intake manifolds for this purpose, whether it had AC or not. It also used a 17mm hex head bolt (M8).  Previously just an area was provided which could be drilled and threaded. Early 230SL cars had no provisions for this third mounting point at all, so a slightly different bracket was used. In this early situation, most were anchored to the head intake manifold stud using a special long nut or possibly an additional clip to attach to the manifold. I suggest that you wait till you have your sedan bracket so we can see what kind of connection is best.

[Mpgeslak]

Thanks Joe.   

I do have the sedan AC bracket, I saw one on Ebay several months ago and figured it would be wise to get it while it was available.   Photos attached. 

I have also attached photos of my intake manifold (air hose is still in position, I haven't moved it yet).  I looked online at 280SL intake manifolds and saw photos of ones where a threaded hole is facing the passenger side (LHD), but on mine there is a threaded hole just under the hose but it faces front. 

Seems I will need to use either the hole under the hose or the intake hole in the manifold to attach some sort of L bracket that faces toward the passenger side to secure the third attachment point?

Thanks,

Michael

[ja17]

Looks like you may have the thread that hole? Yes a small angle clip might work. Some of the earliest sedan brackets did switch back and connect to that.