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  #1  
Old 02-28-2011, 09:26 PM
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Join Date: Jun 2002
Posts: 60
89 420 sel cylinder head rebuild

205k

planning to have my cylinder heads rebuilt: 6, 7 and 8 are all leaking some oil

some questions:

1. Buy rebuilt or have mine rebuilt? Any suggestions for machine shops in Ohio?

2. I know how to check the rocker arms but have read that they should be replaced at this point with the mileage - thoughts?

3. Should I replace the ball studs as well and/or is there a check to determine if they need to be replaced?

4. Read how to check the cylinder head bolts for stretch. Am considering replacing all of them - a little expensive... Read a suggestion to order the bolts from a website like "boltdepot.com" - should these come from the dealership or can they be purchased elsewhere without concern?

I have all the gaskets, guides, timing chain, tensioner, etc. (will remove the front cover as well), vacuum lines (once the intake is removed) - any other thoughts would be appreciated.

thanks

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  #2  
Old 02-28-2011, 09:35 PM
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Join Date: Oct 2004
Posts: 4,327
Have yours rebuilt.
Replace rockers and lifters only if wear warrants.
I'd only use M/B bolts but would be very surprised if you'd need to replace any.
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #3  
Old 02-28-2011, 09:47 PM
Senior Member
 
Join Date: Nov 2002
Posts: 871
all the heads i've had done over the years, they only needed guides and the occassional lifter. find a shop who's done benz heads in the past, they should know how to check the lifters and not mix things up so as to screw up the valve adjustment. good luck, chuck.
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  #4  
Old 03-02-2011, 06:03 AM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
Where are you located in Ohio?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #5  
Old 03-02-2011, 11:26 AM
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Join Date: Jun 2002
Posts: 60
cylinder head rebuild

located in cleveland but would drive if necessary for this repair
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  #6  
Old 03-02-2011, 11:40 AM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
Heres where our cars have been going for 25+ years. Give them a call, see what they say

http://maps.google.com/maps/place?um=1&ie=UTF-8&q=carrs+warren,oh&fb=1&gl=us&hq=carrs&hnear=Warren,+OH&cid=3155837898008133913

-Kris

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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