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 > General Discussions > Off-Topic Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-10-2008, 12:41 AM
Unregistered Abuser
 
Join Date: Jul 2005
Location: Eau Claire WI
Posts: 968
Small block chev help needed (305, rocker arms)

It's in an 89 camaro. we redid the valve stem seals, and have had issues getting the rocker arm bolts to the right torque. The manual is useless, 85 inch pounds or something dumb like that...

Either they're too loose, and make noise, or too tight and it wont run.

Please help, what's the correct way to tighten down the rocker arm nuts after replacing the valve stem seals?


Thanks for the help
~Nate

__________________
95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)
Reply With Quote
  #2  
Old 05-10-2008, 12:58 AM
mgburg's Avatar
"Illegal" 3rd Dist. Rep.
 
Join Date: May 2006
Location: Onalaska, WI.
Posts: 221
Nate:

PM me and I'll set you up with a guy in Independence that re-built my 283 Chevy SB a few years ago...his name is Steve...
__________________
.

.
M. G. Burg
'10 - Dakota SXT - Daily Ride / ≈ 172.5K
.'76 - 450SLC - 107.024.12 / < .89.20 K
..'77 - 280E - 123.033.12 / > 128.20 K
...'67 - El Camino - 283ci / > 207.00 K
....'75 - Yamaha - 650XS / < 21.00 K
.....'87 - G20 Sportvan / > 206.00 K
......'85 - 4WINNS 160 I.O. / 140hp
.......'74 - Honda CT70 / Real 125

.
“I didn’t really say everything I said.”
. . . . . . . . . . . . . . . . . . ~ Yogi Berra ~
Reply With Quote
  #3  
Old 05-10-2008, 01:22 AM
OMEGAMAN's Avatar
Registered User
 
Join Date: May 2005
Posts: 705
You dont torque them down they are adjustable. Here is how you do it. Put the lifter on the base circle of the cam ( top dead center on compression stoke) loosen rocker so pushrod can easily turn back and forth with oily fingers. While turning the pushrod slowy tighten the rocker untill the pushrod stops turning (thats zero clearance). then tighten the rocker 1 full turn.
If you get a manual it will tell you what 8 rockers you can adjust at tdc #1 then turn the crank 1 turn and do the rest. Or you can just do one cyl at a time.
Reply With Quote
  #4  
Old 05-10-2008, 06:32 AM
KarTek's Avatar
<- Ryuko of Kill La Kill
 
Join Date: Jun 2007
Location: Bahama/Eno Twp, NC
Posts: 3,258
I always did mine with the engine running but you have to have the clips that keep the oil from squirting everywhere.

Tighten each one down until it just quits clicking then turn 1/4 turn, listen for the engine to bog down then smooth out, turn another 1/4 turn, wait and then a final 1/4 turn...
__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250
Reply With Quote
  #5  
Old 05-10-2008, 10:37 AM
waybomb's Avatar
Registered User
 
Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
Quote:
Originally Posted by OMEGAMAN View Post
You dint torque them down they are adjustable. Here is how you do it. Put the lifter on the base circle of the cam ( top dead center on compression stoke) loosen rocker so push rod can easily turn back and forth with oily fingers. While turning the pushrod slow tighten the rocker untill the pushrod stops turning (thats zero clearance). then tighten the rocker 1 full turn.
If you get a manual it will tell you what 8 rockers you can adjust at tdc #1 then turn the crank 1 turn and do the rest. Or you can just do one cyl at a time.
Yikes! I believe the above procedure is for fully pumped up lifters. If you aren't sure they are pumped up, you could put your valvetrain in a bind and break something.

Here's a better way.

On the base line, as done above, tighten the rocker until the pushrod displaces the lifter plunger to about half of its travel. To find the travel of your particular lifter, compress the piston to the bottomed out point. Then back off halfway.

USE GM EOS assembly lube on non-roller lifter engines!!!!! One 16 oz can per 5 quarts of oil. Make sure you also generously apply assembly lube to the cam lobes and lifters.

THIS IS CRITICAL!. ZDDP has all but been removed from conventional gas engine oil to protect the catcon. ZDDP is what intimately protects wiped surfaces in your engine - lifters and cam lobes. Then use DELO400 or other diesel engine oil as the lubricant. It still has a decent amount of ZDDP is it.
__________________
Thank You!
Fred
2001 E430 Sport, 204,000 miles
1997 C280 Sport, 144,000 miles
1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
1988 46' US1 Cougar, 3 supercharged 572's
http://s4.photobucket.com/albums/y145/waybomb/
Warming the globe, 24 cylinders at a time
And I want a 126 wagon! Point me to one!
Reply With Quote
  #6  
Old 05-10-2008, 10:40 AM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Quote:
Originally Posted by KarTek View Post
I always did mine with the engine running but you have to have the clips that keep the oil from squirting everywhere.

Tighten each one down until it just quits clicking then turn 1/4 turn, listen for the engine to bog down then smooth out, turn another 1/4 turn, wait and then a final 1/4 turn...
That's the way I've always adjusted GM rocker arms with hydraulic lifters, even without the clips. It gets a little messy but I just take the car to the car wash afterwards and spray down the engine compartment.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #7  
Old 05-10-2008, 10:41 AM
OMEGAMAN's Avatar
Registered User
 
Join Date: May 2005
Posts: 705
Quote:
Originally Posted by waybomb View Post
Yikes! I believe the above procedure is for fully pumped up lifters. If you aren't sure they are pumped up, you could put your valvetrain in a bind and break something.

Here's a better way.

On the base line, as done above, tighten the rocker until the pushrod displaces the lifter plunger to about half of its travel. To find the travel of your particular lifter, compress the piston to the bottomed out point. Then back off halfway.

USE GM EOS assembly lube on non-roller lifter engines!!!!! One 16 oz can per 5 quarts of oil. Make sure you also generously apply assembly lube to the cam lobes and lifters.

THIS IS CRITICAL!. ZDDP has all but been removed from conventional gas engine oil to protect the catcon. ZDDP is what intimately protects wiped surfaces in your engine - lifters and cam lobes. Then use DELO400 or other diesel engine oil as the lubricant. It still has a decent amount of ZDDP is it.
There is a spring inside the lifters keeping the plunger at the top. You can even use this procedure on a new lifter. One turn will put the plunger at mid travel.
Reply With Quote
  #8  
Old 05-10-2008, 11:01 AM
waybomb's Avatar
Registered User
 
Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
I've been able to spin a pushrod all the way to the bottom. I lubed the heck out of everything. I learned from my mistakes. My way takes out any guesswork.

And these days, with the oil being sold, adjusting after start up could be disastrous.
__________________
Thank You!
Fred
2001 E430 Sport, 204,000 miles
1997 C280 Sport, 144,000 miles
1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
1988 46' US1 Cougar, 3 supercharged 572's
http://s4.photobucket.com/albums/y145/waybomb/
Warming the globe, 24 cylinders at a time
And I want a 126 wagon! Point me to one!
Reply With Quote
  #9  
Old 05-10-2008, 11:32 AM
Registered User
 
Join Date: Mar 2006
Posts: 1,055
well beings you just did valvestems seals there should be no need for a break-in oil.i usually just run the rocker nuts down til the slop is gone.start engine,tighten up the loose ones til they just quit clattering,get them all quiet,shut off engine then give em all a half turn.i never give them a full turn.
Reply With Quote
  #10  
Old 05-10-2008, 02:43 PM
Registered User
 
Join Date: Jan 2007
Location: Howard Co MD
Posts: 46
I always did the 3/4 turn past quiet while running technique. I was a teenager back then, and was not a bit concerned about the oil. It disappeared into Dad's gravel driveway pretty quickly.
Reply With Quote
  #11  
Old 05-10-2008, 03:58 PM
waybomb's Avatar
Registered User
 
Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
Quote:
Originally Posted by catmandoo62 View Post
well beings you just did valvestems seals there should be no need for a break-in oil.i usually just run the rocker nuts down til the slop is gone.start engine,tighten up the loose ones til they just quit clattering,get them all quiet,shut off engine then give em all a half turn.i never give them a full turn.
Oh, my bad. Somehow I thought this was a rebuild. As RosannaAnna Danna says - Never Mind.............


But, if you could fimd an old sbc valve cover somewhere, and cut the top off, it will keep thing clean.
__________________
Thank You!
Fred
2001 E430 Sport, 204,000 miles
1997 C280 Sport, 144,000 miles
1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
1988 46' US1 Cougar, 3 supercharged 572's
http://s4.photobucket.com/albums/y145/waybomb/
Warming the globe, 24 cylinders at a time
And I want a 126 wagon! Point me to one!
Reply With Quote
  #12  
Old 05-10-2008, 05:43 PM
Registered User
 
Join Date: Mar 2006
Posts: 1,055
Quote:
Originally Posted by waybomb View Post
Oh, my bad. Somehow I thought this was a rebuild. As RosannaAnna Danna says - Never Mind.............


But, if you could fimd an old sbc valve cover somewhere, and cut the top off, it will keep thing clean.
i've seen people do that.only problem he would have is on an 89 they used 3 bolts down thru the top of the valvecover,not the 4 bolts on the outside lip of the cover.
Reply With Quote
  #13  
Old 05-10-2008, 06:42 PM
Unregistered Abuser
 
Join Date: Jul 2005
Location: Eau Claire WI
Posts: 968
Yeah, they're stupid, and a ***** to work with...

What are theese clips called, the ones that keep the engine oil from squirting everywhere...

So, plan of action consists of:
Take covers off, install the clips, and loosen the tight ones, and then (when running) adjust them so they just stop making noise. Then shut it down and tighten them 1/2 turn?

Mondays the day
~Nate
__________________
95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)
Reply With Quote
  #14  
Old 05-11-2008, 12:26 AM
KarTek's Avatar
<- Ryuko of Kill La Kill
 
Join Date: Jun 2007
Location: Bahama/Eno Twp, NC
Posts: 3,258
Loosen all the rockers until you can spin the push rod with your fingers but not lift it up and down. Start the engine and loosen each rocker until it clicks then slowly tighten it back down until it just stops clicking. From there, with the engine still running, tighten it 1/4 turn and wait for the engine to bog down and then return to a normal speed. Repeat this two more times for a total of 3/4 turn on each rocker.

It should go like this for each rocker:

1. Loosen or tighten rocker (all of them) until you can just spin it with your fingers.
2. Start engine.
3. Loosen rocker until is starts to click.
4. Tighten rocker until it just quits clicking.
5. Turn 1/4 turn, wait for the bog and return to speed.
6. Tighten another 1/4 turn, wait for the bog and return to speed.
7. Tighten a final 1/4 turn.


Clips:

http://www.jegs.com/p/Mr.+Gasket/748856/10002/-1/10797

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Last edited by KarTek; 05-11-2008 at 12:33 AM.
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 02:48 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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