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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-20-2007, 11:27 PM
Hagglunds BV206 with MB 6
 
Join Date: Feb 2007
Posts: 18
Head Gasket replacement in 617.952

My head gasket was leaking exhaust into my coolant so I am replacing it. I measured the warp in the head and it is about .09" . What is the max tolerance for warp and if I need the head ground can it be done with the valve and pre combustion chamber in? My head bolts are all over the max length by .13 to 1.22 mm and was wondering how important this really is to replace them. Any advice would be appreciated
Reply With Quote
  #2  
Old 02-21-2007, 06:50 AM
LarryBible
Guest
 
Posts: n/a
Do you REALLY mean .09"?!?! That thing is a snake if it has that much warp. If you only mean .009 then it can be straightened by a COMPETENT machinist that will cut ONLY enough to make it straight. If it really is .09, look for another head. If you do resort to another head make SURE that you use the correct series and the correct prechambers for your piston type.

Yes you REALLY DO need to replace the head bolts. They are usually good for at least ONE reuse and usually two. Since the head bolts are this stretchd AND you have a warped 617 iron head, I expect that someone has been in there ahead of you and did not get it together correctly. The 617's just don't warp heads very much. You can overheat them like crazy and it won't hurt them in that way. Overheating will cause other problems, but rarely that on this particular engine.

I expect that you can find a head without too much trouble by just posting in the parts section of this forum.

Make sure that you understand the head torquing procedure before going back together with it.

Good luck,
Reply With Quote
  #3  
Old 02-22-2007, 12:28 AM
Hagglunds BV206 with MB 6
 
Join Date: Feb 2007
Posts: 18
LOL ya .009" . Thanks for the info I will be phoning around to see who can grind it. Still would like to know if the precombustion chambers have to come off?
Reply With Quote
  #4  
Old 02-22-2007, 12:36 AM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 8,950
Thumbs up

Yeah you'd want to take the entire head apart.

Replace the bolts, they're cheap as can be.
__________________
I'm not a doctor, but I'll have a look.

'85 300SD 243k
'87 300SDL 251k
'90 300SEL 322k
'91 560SEL 183k

Eight others from IH, BMW, GM, Ford, and Volvo.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
Reply With Quote
  #5  
Old 02-22-2007, 06:49 AM
LarryBible
Guest
 
Posts: n/a
Sorry I missed the question, yes the prechambers must come out if the head is to be milled. As the previous poster said, it really should be completely stripped for surfacing. This shouldn't be a problem, because you will want to do a valve job with new guides while you have it off.
Reply With Quote
  #6  
Old 05-18-2007, 12:49 AM
Hagglunds BV206 with MB 6
 
Join Date: Feb 2007
Posts: 18
So I finally sent my head in to be surfaced and was told it had cracks. I found a used one and had it sent direct to the shop and had it done. When I got them both back I could see the head weren't exacltly the same. The glow plugs on the one I bought was the old 18mm loop style and my original one are the 12mm pencel style. The pre chambers are also different. The head was supposed to be off the same type engine 617.952 so did mercedes changes heads at some point and will this replacment head work?
Reply With Quote
  #7  
Old 05-18-2007, 06:46 AM
Admiral-Third World Fleet
 
Join Date: Feb 2002
Location: Central FL
Posts: 3,068
That head must be off a NA engine. As far as I know, all turbo engines got the pencil type glow plugs. Even the early 617.950 like I have on my W116 300SD.

It may still work, though- not sure of any other major differences. Probably the prechambers are of a different design than what you had.

Rick
__________________
80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
Reply With Quote
  #8  
Old 05-18-2007, 08:23 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,066
they also hardened the valve seats on the Turbo heads.
it MAY be ok, but more informed Techs will have to chime in.
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #9  
Old 05-18-2007, 08:32 AM
Admiral-Third World Fleet
 
Join Date: Feb 2002
Location: Central FL
Posts: 3,068
Yeah- you would want to use your old valves and cam, for sure. The later cam is harder and possibly the valves were upgraded for the turbo.

Rick
__________________
80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
Reply With Quote
  #10  
Old 05-18-2007, 09:22 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,066
OOOH, yes The exhaust valves themselves are Sodium filled to dissipate the heat of the turbo. if your head rebuilder did not swap out the valves, GO BACK and get them off the cracked head.
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #11  
Old 05-18-2007, 09:30 AM
Benzcrusher's Avatar
Registered User
 
Join Date: Jan 2004
Location: Upstate SC
Posts: 1,114
Turbo exhaust valves are bigger than the NA valves...
__________________
"Shabby" 1978 240D with a 300D motor
1997 Volvo 960 wagon 245K
Reply With Quote
  #12  
Old 05-18-2007, 10:10 AM
Rashakor's Avatar
Darth Diesel
 
Join Date: Apr 2006
Location: Philly PA
Posts: 676
I am positively sure that the NA and Turbo head are NOT interchangeable (there have been many discussions here aout that). You need to go back and get a turbo head. The glow plugs are a dead give away. I the exhaust valves are effectively different that is another sign that they give you a cheap replacement head!
__________________
------------------------------------------
Aquilae non capunt muscas! (Eagles don't hunt flies!)


1979 300SD Black/Black MBtex239000mi
1983 300TD euro-NA. White/Olive Cloth-MBtex 201000mi. Fleet car of the USA embassy in Morocco
1983 240D Labrador Blue/Blue MBtex 161000mi
Reply With Quote
  #13  
Old 05-18-2007, 11:10 AM
Hagglunds BV206 with MB 6
 
Join Date: Feb 2007
Posts: 18
So I checked the part # on the head and they are both the same 617 016 0301 but the replacment is stamped 77 and my original is a 84. Did mercedes make a turbo in 77?. The valves are the same size but the top of them are different, the one from the 77 head has a big indent on the top and the 84 are almost flat. I am not sure what to do, I don't want to waste time and money putting in something that won't work.

Ray
Reply With Quote
  #14  
Old 05-18-2007, 11:29 AM
Admiral-Third World Fleet
 
Join Date: Feb 2002
Location: Central FL
Posts: 3,068
I am not sure about the marking but no 1977 turbo was made. If the valves and cam swap you are probably OK.
__________________
80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)
Reply With Quote
  #15  
Old 05-18-2007, 02:14 PM
d.delano's Avatar
Dönerkebap
 
Join Date: May 2004
Location: DC
Posts: 1,466
sell that head and get another one, this time go for a turbo head from the same model year as the original
this way there will be no confusion
__________________
'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)
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 03:49 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page