Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Vintage Mercedes

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-02-2007, 01:13 PM
Registered User
 
Join Date: Jan 2007
Location: Los Angeles
Posts: 49
Cyliner heads on '73 M117

Due to a suspected bent valve situation I'll be checking the yards this weekend for a suitable set of rebuildable cylinder heads. How many variations do I have to choose from? I'll likely stick with a pair from a W108 or W116 w/o air injection, not too many differences there I hope. Also, what is the best source for the specialized hex drivers I'll need to deal with the head bolts?
Reply With Quote
  #2  
Old 03-03-2007, 09:58 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,654
Getting the heads off is easy w/o the wierd wrenches. You need an 8mm allen key in sockets and a universal joint. Having the two specialed wrenches is essential for reassembly.

You need the EFI heads. It won't matter if it's a 280se 4.5 or a 450se or a 450sl. Tomguy suggests a set of 3.5 heads as a compression upgrade.

I use Baum tools for my specialized tools, but there are less expensive places to buy them.

Aside from the wrenches, don't forget a 24mm wrench for the bolt on the cam and a gear puller. Also you need the pin extractor for the guide rails.

That or bring a means of cutting the timing chain. One easy technique, if the engine turns, is to look for a master link pin and remove it.

-CTH
Reply With Quote
  #3  
Old 03-03-2007, 03:51 PM
Benzcrusher's Avatar
Registered User
 
Join Date: Jan 2004
Location: Upstate SC
Posts: 1,114
I've got a M117 parts motor out of a 72 280SE 4.5. Heads are $50 each plus shipping.

I've had good luck with Samstagsales.com. http://www.samstagsales.com/mercedes.htm#engine

As the dollar looses ground to the Euro prices are getting steep.....
__________________
"Shabby" 1978 240D with a 300D motor
1997 Volvo 960 wagon 245K

Last edited by Benzcrusher; 03-03-2007 at 04:00 PM.
Reply With Quote
  #4  
Old 03-03-2007, 04:41 PM
Tomguy's Avatar
Vintage Moderator
 
Join Date: Aug 2002
Location: Not where I want to
Posts: 5,032
In theory, any m116/m117 heads from a cast block will work. From what I've heard from a mechanic (not sure about this one) you can use K-Jet heads on a D-Jet engine and vice-versa. But I would personally suggest, as CTH says, 3.5 D-jet heads (from a 111, 108, 109, 107 or 116 - they'll all work).
__________________
Current:
1999 Chrysler 300M (Click for pic) - 207,xxx - totalled by Nationwide for $1600 in damage. Being rebuilt better.
2014 Jeep Grand Cherokee Limited (Click for pic) - 32,xxx

My Mercedes Benz 108 109 resource site
August 2014 newsletter live.

Previous: 1972 280SE 4.5 "Quicksilver", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
Reply With Quote
  #5  
Old 03-03-2007, 04:47 PM
Registered User
 
Join Date: Jan 2007
Location: Los Angeles
Posts: 49
Yeah, this morning I figured out that the special tools are not necessary to get the heads off. Right now there's a CIS 4.5 and a later 5.0L M117 in my yard of choice. So there is a definite difference between the EFI and later CIS heads? It would seem typical of Mercedes to have a differently machined head due to injector type. Though I'd prefer to get another set of heads I could swap with mine couldn't I also just harvest the unbent valves from the junkyard heads? Would a piston/valve collision cause other damage to the head castings or guides?
Reply With Quote
  #6  
Old 03-03-2007, 04:53 PM
Tomguy's Avatar
Vintage Moderator
 
Join Date: Aug 2002
Location: Not where I want to
Posts: 5,032
Note how I said "from a cast block"! The aluminum block m116 and m117s have different bolt patterns for the heads - otherwise, 420 heads would probably make one hell of an upgrade for 4.5s (better combustion chambers, better flow, higher compression). Also, not all m116s and m117s had the same valves for heads. I need to double-check, but I think only intakes from a 5.0 would be interchangeable (if at all).
__________________
Current:
1999 Chrysler 300M (Click for pic) - 207,xxx - totalled by Nationwide for $1600 in damage. Being rebuilt better.
2014 Jeep Grand Cherokee Limited (Click for pic) - 32,xxx

My Mercedes Benz 108 109 resource site
August 2014 newsletter live.

Previous: 1972 280SE 4.5 "Quicksilver", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
Reply With Quote
  #7  
Old 03-04-2007, 12:05 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,654
There's a head gasket change for the non-hydraulic lifter heads to hydraulic, isn't there? That's usually a really good sign to be VERY careful on an interchange.

-CTH
Reply With Quote
  #8  
Old 03-04-2007, 04:53 PM
Tomguy's Avatar
Vintage Moderator
 
Join Date: Aug 2002
Location: Not where I want to
Posts: 5,032
If there is, CTH, then the ones on FastLane must be for the hydraulic heads, and work for the ones with manual as well - because the same part shows for a 1972 4.5, and a 1978 450SEL.
__________________
Current:
1999 Chrysler 300M (Click for pic) - 207,xxx - totalled by Nationwide for $1600 in damage. Being rebuilt better.
2014 Jeep Grand Cherokee Limited (Click for pic) - 32,xxx

My Mercedes Benz 108 109 resource site
August 2014 newsletter live.

Previous: 1972 280SE 4.5 "Quicksilver", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
Reply With Quote
  #9  
Old 03-04-2007, 05:22 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 31,245
on a diesel if you have a piston hit valves they break the cam.

i don't know about a v8.

i would have a good machinist look at it and install the valves. you will want to grind them anyway while it is apart.

tom w
__________________
Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins& six speed; I have had about 35 benzes. I am finishing a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual....I also have a Lotus 7 replica autocrosser with a modified K20 Acura engine.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:48 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page