Re: [Amc-list] 196 OHV - removing head, diagnosing rings

["jerijan baldwin" <jerijan@xxxxxxxxxxx>]

In fact, this IS the time for that compression test...
First, it gives a 'reference' state of affairs inside engine.
That 'reference' state tells you a number of things; mostly it says
'healthy' or 'problem here: (low compression cylinder[s])'.
This provides you with the roadmap for deeper 'naked' peering into the
status of that engine.  If all show 'healthy', use that old, well advised
adage, 'if it aint broke, don't fix it'.  
Compression tests are 'diagnostic' tools.  'further' compression tests (if
low in some cylinders, give 'em a few squirts of oil and test 'em again)
will reveal if your 'lows' are rings or 'other' (valves, broken piston, head
gasket, etc)
So...
BEFORE you 'take it down, be sure you must.
Jj

-----Original Message-----
From: amc-list-bounces@xxxxxxxxxxxx [mailto:amc-list-bounces@xxxxxxxxxxxx]
On Behalf Of JOE FULTON
Sent: Thursday, February 28, 2008 12:31 PM
To: AMC/Rambler owners, drivers and fans.
Subject: Re: [Amc-list] 196 OHV - removing head, diagnosing rings

By pulling the head you will be able to see the
cylinder bores above the piston travel area.  If you
see a line of scratches on a bore, you might have a
broken ring, but you will not be able to tell for sure
unless you remove that piston assembly from the bore.

It might not be a bad idea to inspect the bores. It's
a judgement call, depending on how you want to use the
car and how much effort you want to put into a repair.
 

You might have a ring of rust in one or more cylinders
that causes the "clicking" noise when the rings travel
over it.

Joe Fulton
  
--- Bruce Griffis <bruce.griffis@xxxxxxxxx> wrote:

> Well - my car was idling nice, sounding good! Last
> night my son and I heard
> some bad scraping noises from the front. We shut it
> down. I pulled all the
> plugs, disconnected the battery and turned it by
> hand. Phew!!! The fan belt
> was scraping against a hose clamp towards the top of
> the engine. I rotated
> the hose clamp, tightened it down, then turned the
> engine again by hand. No
> more scraping sound.
> 
> BUT ... - I did hear a clicking noise from the first
> cylinder. I put m finger
> over the spark plug hole, and it seems like after I
> hit TDC then go back down
> on the stroke - something in the cylinder makes a
> brief scrape then a click -
> I'm imagining a broken piston ring acting up as the
> cylinder changes
> direction.
> 
> Rather than imagine - I'd like to pull the head and
> take a look. I figure it's
> not time to do a compression test - as I can hear
> noises from inside the
> engine.
> 
> So - when removing the head, first I remove the
> hoses, then I remove the valve
> cover, then the exhaust manifold, then the carb? Do
> I need to remove the
> intake manifold? Is the intake manifold integral to
> the head? Right now I've
> got all bolts sprayed with PB Blaster and am trying
> to figure out next steps.
> 
> 
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>
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> 

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