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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 08-02-2005, 04:01 PM
LarryBible
Guest
 
Posts: n/a
Quote:
Originally Posted by rdanz
No need to apologize I respect your input and although I am not a fan of flushing engines or of MMO these were extreem cases and the method was reccomended by an automotive engineer who was my neighbor
Flushing engines is risky and you could end up with more problems than you started with.
PS I usually only use MMO in my air tools.
Ditto. There is a can of MMO next to my tool box and my air tools get a few drops before each day of use.

There was a time when the additive package in motor oil was somewhere between very poor and non existent. In those days the situation was aggravated by colder thermostats and draft tubes allowing for more moisture buildup in engine crankcases. In those days MMO was a drastic step that had to be taken under certain conditions and was about the best we could do. There are some folks who don't realize just how drastically all of this has changed, thus they cling to the old ways.

NOW, however, engines have very good crankcase ventilation and higher temps which boil away more moisture resulting in a lot less acid buildup. Add to that the EXCELLENT motor oil additive packages in premium oils and you have a combination that will never need such drastic cleaning if the oil is kept changed.

For those drastic cases where oil has not been changed to a point of buildup, a good oil, preferably one of those I have noted, changing very often and always draining hot for an extended period of time is the best and safest step toward cleaning the engine IMHO.

The Gunk is a decent way to clean a gunked engine, but I would personally use that approach sparingly and VERY carefully as you point out.

Have a great day,
Reply With Quote
  #17  
Old 08-02-2005, 11:47 PM
wbain5280's Avatar
Registered User
 
Join Date: May 2001
Location: Northern Va.
Posts: 3,386
It's an exhaust leak. Chevy doesn't use gaskets between the manifold and the head. Leaks develop which sound like bad lifters.
__________________
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
  #18  
Old 08-03-2005, 08:49 AM
LarryBible
Guest
 
Posts: n/a
wbain,

Go back and reread the original post. He says that when he revs it up the noise goes away. An exhaust leak that goes away when you rev it up? I don't THINK so.

Have a great day,
Reply With Quote
  #19  
Old 08-03-2005, 09:33 AM
rdanz's Avatar
Registered User
 
Join Date: Sep 2002
Posts: 1,158
You mite have an exhaust leak when the engines cold and goes away after it warms up due to expansion, but an exhaust leak that goes away by reving the motor once its warmed up is Impossible
Reply With Quote
  #20  
Old 08-03-2005, 10:59 AM
LarryBible
Guest
 
Posts: n/a
Although an exhaust leak is possible on any engine, we have to look at the probabilities here. This is not an MB. The SBC has a VERY weak cam and valve train. The cam is too small, the lifters are too small and the rocker arms are a chincy, stamped piece that a cost conscious engineering group came up with over 50 years ago. Not to mention the original design was conceived to handle no more than a few hundred horsepower.

The SBC modified in '87 for roller lifters got no change in the rocker arm area. They are prone to having noise if the oil is not kept clean. The exhaust manifolds on the other hand are not known for leaking.

At this point we have to operate on probabilities like a physician. The probabilities are HEAVILY in favor of the noise being valve train related.

We also have to give the poster some credit for knowing the difference between valve train noise and an exhaust leak.

Have a great day,
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 SDL- AC Coming Out Of Defroster Vents Question? ezrider Diesel Discussion 3 07-10-2003 08:02 AM
Newbie Question josephcorderomd Diesel Discussion 1 07-07-2003 10:59 AM
ML 350?? just a punched out 3.2? Motorhead ML, GL, G-Wagen, R-Class, Unimog, Sprinter 0 05-23-2003 08:50 PM
Radiator & Oil Cooler Question cKoeller Tech Help 1 03-25-2003 05:50 PM
Radiator & Oil Cooler Question. cKoeller Vintage Mercedes 0 03-25-2003 01:30 PM



All times are GMT -4. The time now is 07:49 AM.


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