AMC I-6 Oil weapage / leakage / seepage

["Brien Tourville" <hh7x@xxxxxxxxxxx>]

These engines ran a plastic valve cover that
was a failure the day it was installed.

AMC removed using a few of the bolts - why
I'll never know - which allows the plastic to
'bulge' - allowing the gasket to fail in areas.

The aging plastic warps - adding to the number
of gasket failures.

There have been a number of engine fires
due to these Design Flaws.

These engines also develop a lot of crankcase
pressure - in part due to the lack of 'windage'
area inside .  

With every crank rotation - the pistons
'pump' the inside air - eventually weakening
the rear main seal - and front seal around
the crankshaft.

I would look there for oil at the front seal
that is then blown back on the engine .

The 4.0 engines around 1989 had some 'upgrades'
to the PCV - Pollution Contorl System - which helps
but - with time and mileage - the 258 / 4.0 will
push oil out of the engine thru seals / gaskets.

The PVC valve itself should be kept up - as
allowing the engine to draw air in will weaken
the seals rapidly .  

As this continues - the
seal 'Lips' develop tears which can only
be remedied by replacement.

This also occurs if the vehicle has sat
a long time - allowing the seal lips to go
dry . When the engine is started - they 
tear .

This also happens to the TorqueFlite transmissions
front seal ........ ask me how I know ......... .

 
          Brien.
      NEW YORK





Subject:        	mail Digest for 17 Oct 2004 in hour 20:00
Date sent:      	Sun, 17 Oct 2004 20:05:18 -0700
Send reply to:  	mail-From-<# print(JADDR); #>@amc-list.com

" My daughters 83 Spirit (258 engine) appears to be
" leaking oil out of the dipstick tube.  Is this
" possible?  I haven't been able to confirm it but the
" oil is on everything behind the end of the dipstick
" (ie the top of the distrib, etc).  It's definitely not
" coming from the valve cover or from the base of the
" distrib (new gasket). Any suggestions apprecitated. 

first thought - plugged pcv valve, forcing pressure to 
build 
up in
crankcase.  possible?
_________________________________________
_____________________
__________
Andrew Hay                                  the genius nature 
internet
rambler                            is to see what all have 
seen

adh@xxxxxxxxxxxxxxxxx                       and think what 
none thought