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-Benz Forum > Mercedes-Benz Tech Information and Support > Vintage Mercedes Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-30-2004, 01:14 AM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
220 head

Hello,

I have a 72 Mercedes 220/8. It's a 4 cyl with a sohc. How do I get the head off of it. There is the timing chain at the front and I don't really know what to do with it, how to get it off, how to make the timing stay correct. I don't really know how to adjust the timing, so I don't want to cause it to get changed.

I just want to look at the piston rings and see what condition the engine is in. This is the first time that I have pulled the head off of an engine, so I don't know what to really expect from it all. I was hoping that there might be a piston ring that is sticking to the piston and not making a good seal, would I be able to see at least one piston ring.

Thank you

spencerbandit88

Reply With Quote
  #2  
Old 07-30-2004, 07:41 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 4,026
No, you won't see a piston ring unless you also remove a piston. You will be able to see the walls of the cylinders and get an idea if they're scraped up.

Pulling the head isn't particularly difficult. It takes a few hours if you have the right tools. It also helps to have a bit of common sense and patience. Prior experience isn't necessary. Though it always helps.

Assembly time is more difficult than disassembly for several reasons, including, getting the timing right and putting everything back where it came from (there are dozens of interlocking parts) and getting the assembly tolerances correct.

Having said all that, what is the problem you're trying to solve? Pulling the head off just to see what's under it is a lot of work to convince a ring to not stick. Also if it is a sticky ring and you want replace it, you have to remove the engine from the car, and after removing the head, remove the pan and the crank too.

Explain the problem and we should be able to help you diagnose the cause and suggest a cure. BTW, a cost-effective solution to a screwed up engine is to get a used one and drop it in.

-CTH
Reply With Quote
  #3  
Old 07-30-2004, 02:25 PM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
Well I don't really know how to get the cam off. So I can even see the top piston ring with the head off?

And I cant find an engine that I want to buy and put in and also I don't have the tools to change the engine. Someone offered me a Mercedes straight 6 engine that ran and will fit in the place of my 4 cylinder, but he wanted $600.

Thank you

specnerbandit88
Reply With Quote
  #4  
Old 07-31-2004, 10:29 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 4,026
Removing the whole engine requires one specialized tool, an engine hoist. A complete set of metric wrenches & sockets, screw drivers, a jack & jackstands is all it takes. That and a several hours.

Replace the engine with another 4 cylinder or you'll have all sorts of conversion problems that you're not ready to deal with. An engine with a guarentee should set you back about 500$, plus shipping.

You still have explained why you think any of this is necessary. Engine problems can, in certain circumstances, be minimized by changing the oil and driving the car (mercedes don't like to just sit there and rot). Then again, they could mean the motor is outright a gonner.

-CTH
Reply With Quote
  #5  
Old 07-31-2004, 04:31 PM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 216
Compression test?
__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
Reply With Quote
  #6  
Old 07-31-2004, 04:51 PM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
I have done a compression test. There is a thread some where with the results.

Well i'm not going to get a new engine, it's on it's second engine. There should be a 115 and there isn't, on a 115 the valves are all in a row, the ones on this engine are not.

If there is a stuck ring then, how can I free it up. Someone told me solvent will work, just put some into the cylinder and turn the engine by hand, it is true?

spencerbandit88
Reply With Quote
  #7  
Old 07-31-2004, 05:12 PM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 216
Coca Cola
__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
Reply With Quote
  #8  
Old 08-01-2004, 12:50 AM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
Quote:
Originally posted by skalie
Coca Cola
Umm...


I know coca cola (not pepsi) is a good emergency brake fluid, but no other.
Reply With Quote
  #9  
Old 08-01-2004, 02:46 AM
Registered User
 
Join Date: Jun 2001
Location: the netherlands
Posts: 216
Know a guy who unseized a tractor using Coca Cola, he took out the injectors, poured it in and waited over night.

Something to do with the "You can dissolve a nail in a glass of Coca Cola" theory.

Could be an urban myth of course.
__________________
306D 1975 (camper) - rusting away
W116 450 SEL 1975 - sold
W114 long wheelbase ambulance, 3 litre diesel 1974

VW Golf 1 convertable - midlife crisis item
VW T4 van - support vehicle
Reply With Quote
  #10  
Old 08-01-2004, 03:05 AM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
Hmm.... sounds like crap to me. NO OFFENCE TO ANYONE

But i think that the solvent sounds better. But coke cola will clean a penny. Mythbusters on Discovery Chanel.

But anything is worth a try. Maybe i'll go get an old lawn mower and try it with that.

spencerbandit88
Reply With Quote
  #11  
Old 08-01-2004, 09:42 AM
Tim's__Benz
Guest
 
Posts: n/a
Use kerosene, rislone, or mineral spirits. All are similar things that will clean up the gunk, and hopefully free the rings.
Thanks
Tim
Reply With Quote
  #12  
Old 08-01-2004, 02:30 PM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
Hmm.... I think I'll try that. Then the coke.

thanks

spencerbandit88
Reply With Quote
  #13  
Old 08-03-2004, 12:15 AM
wbain5280's Avatar
Registered User
 
Join Date: May 2001
Location: Northern Va.
Posts: 3,386
Try a leak down test. The cylinder is pressurized with an air compressor and they you listen for leaks.

BTW, getting the head off is not that difficult. You will need a gasket set.
__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.
Reply With Quote
  #14  
Old 08-09-2004, 02:44 PM
HGV HGV is offline
Registered User
 
Join Date: Sep 2001
Location: San Francisco
Posts: 378
My father in-law serviced P-38's during WWII and he would take the plane and run it up to temp and then start sprayiin Marvelous Mystery Oil into the intake, and when the exhaust started to run dark, he would shut the engine off and let it sit over night. He would then go out it the morning and start the engine and run it up to speed and blow it out. He said it would clean up stuck rings and valves and give the plane another lease on life. I have done this on my cars and it made a differenece and never did any damage.

I am confused bythis post though. Give the results on the compression test and get the engine model. I am confused by your reference to the valves not being in a row.

I would not take the head off unless you have abeeter idea of what is wrong. If you have a stuck ring, youwill need to pull the engine and remove the pistons. Removing the head won't tell youmuch.

Henry
__________________
63 190d (sold)
69 220D (sold)
69 280SL (sold)
76 BMW 2002 (sold)
86 190E-16v (Demised at Laguna Seca Turn 9)
87 300SDL (sold)
87 300SDL 135k
87 300TD 280k (sold)
95 E320W 211k
95 E320w 111k
05 C320 4matic
06 E320 CDI 90k (Totaled by a texting 19 year old girl in a nissan)
2013 GLK 250 Bluetek 4MATIC
Reply With Quote
  #15  
Old 08-09-2004, 03:16 PM
spencerbandit88's Avatar
My first car was a Benz
 
Join Date: Jul 2004
Location: Spokane WA
Posts: 56
Is what I meant by the valves not being lined up they are diagonal from each other.

/
\
/
\

kind of like that. With the exhaust on the right and the intake on the left.
But in the manual I have it show the valves in a line or row not diagonal.
|
|
|
|

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 05:12 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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