much needed vac mod parts!!!!!

[caeser]

Hello everyone. Not so long ago I purchased a 1972 220 gasser against my better judgement, but par for the course given the nature of my Mercedes illness. It was obviously very neglected and the care it did receive was from a human, whom, in mechanical capacity, was very deficient. After many piles of funds paid out, and mountains of hours of labor she is nearly ready to go all except for a couple of things. First and foremost, she has a 722.2 transmission WITHOUT any of the innards, besides the needle, behind the Vacuum Modulator!!!!!!!!! It would appear, in virtue of evidence gleaned from EPC that the needle is not one of the right ones for this application. It is a 30 mm, and the smallest one indicated on the EPC is a 39.65mm!!!!! I am a ready buyer for any spare Mod., needle, spring and diaphragm anyone had to spare for this 722.2. Research has revealed that the 722.1 has the same setup. If any of you have something you are willing to part with please leave me a message, ( I think that is possilbe here, right?). Thank you all very much for your time and consideration, and, I apologize to the moderators if I have posted this outside of its proper venue. I am open, of course, to correction.
As for the car, I will post pictures once I figure out how to do it for anyone who is interested. ( Transmission functioned very well in forward gears incidentally, even missing part of a clutch pack as well!!!! There was an ugly world in there!!!! One must ask: how, supernatural agency?!!!)

[caeser]

Hello everyone, I found the vac. mod. parts finally, and, fortunately, at a very modest price. Thank you all for your interest. I am now, as per my new post, trying to resolve a problem with the cylinder head. One exhaust valve guide is oversized beyond range, well beyond range. It measures 15.9mm OD. I may have to find another head, rebuildable head that is. Anyone have one? A 115010 chassis. Thank you.

[Stretch]

Ah ha I've found your other post.

To post pictures when you start a new post in a thread by clicking "post reply" you'll see towards the bottom of the page a "manage attachments" option. There you can upload up to 5 pictures per reply.

Remember to re-size the pictures you want to upload to 600X800 or 800X600 pixels or smaller before you upload them - it speeds the process up somewhat and ensures at least a 89.9% success rate!

As the site's sponsors sell valve guides

http://catalog.peachparts.com/ShopByVehicle.epc?q=1972-Mercedes--Benz-220-Engine--Mechanical&yearid=1972%40%401972&makeid=63%40%40MERCEDES%20BENZ&modelid=16043%3AED|10000046%3AMBC|10000029%40%40220&catid=240154%40%40Engine%20Mechanical&subcatid=240205@@Valve%20Guide&mode=PD

I pretty sure these can be replaced.

You'll have to remove the head and take it to a machine shop as they'll probably have to ream the guide to size once it has been fitted.

[caeser]

I hope I am not making myself into a site mosquito, where should I work up this thread? Army, I responded already in the parts forum before I saw your reply here. I apologize for my ignorance as to how the forum works, are works best. I will read up more, which, I confess, I have neglected to do as I am in emergency mode with this project because serious time constraints have descended upon me. Peach Parts does not, nor any other of a number of online sites, or local wholesalers, have the valve guide that I need. Please believe me, I do ample research before I post here or in any other forum. That is, I inquire into as many angles and sources as possible( for me), starting locally, and branch outward, before I try posting. As for the pictures, after trying and failing initially, I have not had time to figure out how to downsize them. Photos direct from my camera( the first I have ever owned), are way to large for the constraints. Dios Mio!!! If it's not the cat, it's the dog!

[Palolo]

If those aren't the guides that you need, which ones do you need?

I have had luck with my local machine shop being able to source raw stock and make both guides and seats for an obscure motor that I had (I am in Hawaii, not exactly the easiest place to find odd parts and whatnot).

My head refurb project was on hold until they asked me one day what my hold up was... Finding hardened valve seats and new guides, I said. "we'll make some" they said, and sure enough, after examining the head and valves, as well as some research, they did their thing and made some to fit. Now I usually ask them to take a look at my projects as a whole, in case they can add value or advice from a machinist's perspective.

I ramble, but my point is that you might want to check with the local "head shop" to see what they say.

[caeser]

Thank you Palolo. I have checked the local machinist, a very reputable head rebuilder, however, I will check with other shops tomorrow to see what they say. The issue I was referring to in the last post can be found in the parts forum, I will not quote it here, but the gist is that someone previously, either by mistake or in order to "correct" damage way, way, bored out to an excess of .9 mm oversize for one of the exhaust guides. The highest they normally go, if I am not mistaken, is .4 mm over.

[Palolo]

OIC. You need guides that don't exist for your head...

Seems like making one is the only option, unless you can wait for a far and wide search to come through, or you just find a head and make this a project in itself. Luckily, old motor valve guides are fairly simple, on the scale of easy-to-impossible.

Good luck on your quest.

[Stretch]

I'd like to make this clear => I have no experience what so ever with a M115 engine...

...but I find it hard to believe that the old guides can not be pushed out and new ones pushed in.

Or are you saying that the hole in the casting is bigger than it should be?

Or are you saying that the fast lane catalogue is showing guides that aren't actually for your engine?

(I'm a bit confused)

[Stretch]

Originally Posted by Army

I'd like to make this clear => I have no experience what so ever with a M115 engine...

...but I find it hard to believe that the old guides can not be pushed out and new ones pushed in.

Or are you saying that the hole in the casting is bigger than it should be?

Or are you saying that the fast lane catalogue is showing guides that aren't actually for your engine?

(I'm a bit confused)

Right - I've caught up with the problem - I've found your other post here

Wanted: 722.2 or 722.1 Vac. Mod parts

The head casting has been oversized. You now need something that is 16mm wide with a 9mm hole in the middle.

I get it!

I can't help you - I don't know of any engines that have valve guides even close to those sizes. However look at your private messages I've sent you one.

[caeser]

Yes Army, that is it, except the ID( inner diameter) of the valve guide needs be 11 mm, (not 9 mm although with drilling would also work)to accommodate 220 gas engine exhaust valve.

[caeser]

Palolo, I agree with your "project in itself" assessment. I could provide ample accounts of the like from the diary of this car since I started. Now I know, now I am enlightened as to the nature of the road, however, when I started I had just recently pulled an engine and tranny from an old Dodge Ram of a friends and ten days later( counting time more or less by addition, i.e., not contiguously) it had been cleaned, painted, resealed, with new clutch and brakes( everything sans booster) and back in one piece awaiting final delousing of remaining tuning bugs. I, with this Dodge project as my gauge, directed my calculative, [ including not time alone, but doubling the money number, (which was too low)], mind toward this old Benz and jumped in, This ol' Benz project, with, albeit, the addition of crank and con rod bearings and piston rings but, without changing out a clutch or brake lines, began roughly in earnest last March and is still going strong in time and money! I include this anecdotal bit for any first time Benz necromancers who may be reading this! Be Ready!

[Palolo]

The good news: The viable MB valve guides with the right (or rather "enough") outside diameter are Exhaust valves from M198 (0.67+"), M189 or M100 (0.63+"). You only need 0.6299", or approx 16mm.

The bad news: Unfortunately, their inside diameters are too wide, their stems being thicker to dissipate heat better.

Now that I have a rough idea of the inch numbers you need, I can ask around out here, although I don't see why our local chaps would be more resourceful than those out there, these days with the web and all...

Just to clarify, this is for a gas 220's exhaust valve guide, with a 10mm (0.3937") ID and you need it to have 16mm (0.6299+") OD. Any idea on the minimum length? (assuming your shop can turn down the top to suit your seal type)

Ok, thinking cap on... Who would overbuild something and totally overspec it? Rolls Royce! Their V8s used 16mm OD and 9.5mm ID valve guides (Int & Exh) from oh, around 1600 through 1985. LOL

[caeser]

Palolo,

Read your PM first and responded there before looking here. I have enlisted the services of a custom shop in Southern Cal. who will make guides to specifications for $40.00 each. Not too much in my view, considering the knowledge and effort to make such small pieces in what amounts to a number not even near meriting the designate term, "batch"! As for what you have grokked of my dilemna, all is correct except I need an 11 mm ID guide as indicated in a previous post on this thread, with a length of 45 mm. Thank you so much for all your help. You all are one knowledgeable group! I will post on how things proceed.

[Stretch]

I have no idea how much spares are where you are but if you assume 40 USD feels like 40 euros (which is more less the case - well that's how I feel about it when I'm on holiday!) I'd expect to be able to buy a second hand head that needs to be rebuilt from 40 euros to about 150 euros for one that is supposedly rebuilt.

I'd leave the one you have on a shelf unless these heads are like rocking horse shi...