Re: IML: IML Sunken valves

["Pete Engel" <peter.engel@xxxxxxxxxxx>]

Robin,

Valve seats were induction hardened by 1971 so I'm surprised to hear that
your car has worn seats.  The exhaust valves do wear faster, though.

Can't help with the manifold question.  I was able to pull the heads off my
70 LeBaron some years ago without issue.  The back stud for the left exhaust
manifold was broken off flush with the head casting and impossible (for me)
to remove.  I had the heads reconditioned at that time.

As far as the engine stampings, the "H" indicates 1972 model year engine.
The "1" and "24" indicate a January 24th, 1972 engine assembly date.

Pete in PA




From: "Robin Giesbrecht" <robings@xxxxxxxxxxx>
Subject: IML: 440 sunken valves
Date: Wed, 29 Jun 2005 23:18:07 -0700
Reply-To: mailing-list@xxxxxxxxxxxxxxxx

Pulled the heads off of my 72 Imperial today. I have got several sunken 
exhaust valves which probably means the seats are gone. Could notice the 
different heights when the rocker arms were removed. Half the valve seals 
are useless.How do you get the drivers side exhaust manifold to clear the 
studs? Removing the engine mount bolts and jacking the engine makes things 
worse. Remove the engine mount and drop the engine? That is what I am 
thinking. Timing chain was trash but the nylon teeth were still on the 
sprocket at 105,000 miles. Very little carbon. This engine is stamped H 440 
with 1 and 24 under this. Any idea what this means besides the 440 
designation?

Robin Giesbrecht
1972 Imperial




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