Re: [Amc-list] 195.6 OHV Progress

[Frank Swygert <farna@xxxxxxx>]

I edited out everything I didn't feel needed a comment. 

1. The oil pan was brazed near the front, or at the portion closest to the crank, I bet. The rod ends come VERY close to the pan on the long stroke 196. If the pan is dented the least little bit the corner of a rod will hit it. I don't think Nash/AMC made the pan any deeper from the 172.6 days, when it had a much shorter stroke. The 172.6, 184, and 195.6 L-heads all used the same bore and different strokes. Of course the 196 OHV was derived from the L-head, and uses the same bottom end, including the oil pan. You can use any of the three cranks and rods in any of the blocks, of course, L-head or OHV. 

2. The bad rear main indicates an imbalance in the clutch or torque converter. I'm betting it's a stick and had a bad clutch that was run to long. The TC flexplate isn't much on one of those cars though, and it could have been cracked and run for a while before giving out. Would have made some noise, but I've seen people run old Ramblers with something damaged and making noise until it quit before! Even some newer cars...

3. Make SURE the shop checks the head for warping and cracks -- especially cracks! They are old and tend to get brittle with age, and cracks are pretty common if they have been run hot. Good heads are getting hard to find, but yours sounds like it should be a good one. No point in spending money on a cracked head though! 

4. The long stroke in these cars tends to wear them at the bottom even though the bores look great. Make sure you check it at the bottom of the ring stroke. I've seen them look perfect at the top and have 0.020" of wear at the bottom from side to side (perfect front to back at the bottom). 

-------
Date: Sun, 2 Dec 2007 09:17:30 -0800 (PST)
From: JOE FULTON <piper_pa20@xxxxxxxxxxx>

The subject is a 65 Rambler with an OHV engine with
low mileage since rebuild.  The car sat inside but got
water in the engine due to a leaking roof in the
building in which it was stored.

I noticed that the oil pan had been damaged and there
were two spots which had been brazed.  This is the
second 196 oil pan which I have seen with dents and
damage and I have seldom seen other AMC pans damaged
in this way.  I'm wondering if it is a fluke or did
these motors have a tendancy to cast off rotating
parts.  Can't tell if the damage at the brazed spots
was internal or external.

The bearings all look good except for the rear main
which shows inordinate wear for a low mileage engine. 
The crank joural at that main bearing is also somewhat
scratched.  

I think I could reuse the
head though without any work on it, but I'll let the
machine shop look it over.

I removed all but two pistons last night.  The two
remaining are in the cylinders that got rusty. The
honing marks are still visible on the cylinders and
there was no ridge near the top so I didn't have to
use a ridge reamer (which I don't even own).

I'm hoping that the block can be honed (only) and
reused.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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