Tim,
When I removed the cylinder head from my 1984 XJ6 VdP last year about
this time, I found that there was a special tool available from the usual
sources to help loosen and tighten the timing chain. I don’t know how to do
this without this tool. Since it was readily available and inexpensive I got
one.
You might try soaking that 22MM bolt with penetrating oil for a few days
to see if that helps. The bolts on the exhaust side of my car came out
easily, so at least I didn’t have that problem. I guess you can also try
heating is up a bit to see if that helps. If all else fails try a bigger
fulcrum (a breaker bar) to get it to budge.
There is lots of information in the archives about head removal that
should be of help to you.
BTW, one thing you must be careful of while doing this work on the head,
be careful not to do any damage to the valves while removing and replacing
the head. Several list members (fortunately not me) have experienced
damage to on or more valve due to valve to valve impacts. The valves in
each cylinder can hit each other if they are open at the same time and
rotated. In addition, the valves sit lower than the bottom of the head, so
it is also possible to damage (bend) them if you sit the head down flat
after you remove it. Please be careful as this can be an expensive error.
I took hundreds of digital pictures of my work (before, in between,
after) so if you get stumped and need a picture, please let me know.
Regards,
Paul Novak
1969 E-Type FHC
1984 XJ6 SIII Vanden Plas
San Diego, CA
@Paul_M_Novak----- Original Message -----
From: “Tim King” tim.king@qedservices.co.nz
To: xj@jag-lovers.org
Sent: Saturday, January 31, 2004 3:30 PM
Subject: [xj] Help removing the Head
Having found water in the oil of my 86 XJ6 I have decided to remove
the head myself.
As a novice at this I am taking this slowly, but I have got myself
stuck.
I have got to loosening the timing chains. Having removed the
breather housing from the front of the engine and loosend the bolt
on the serrated plate I am ready to turn the plate to release the
tension.
I can depress the spring loaded stop peg, slightly lower that the
front face of the serrated plate (but not fully flush with the
housing behind it)
I can move the plate slightly (with pegs in the 2 holes on the
plate) but can get no further and the chain still seems very tight.
Should the stop peg depress fully?
Is there a great deal of force needed to turn the serrated plate to
release the tension?
Is there anything else I should do to complete this?
A secondary question, The exhaust Manifold is covered by a plate
that that is held inplace by 2 bolts a 14mm & a 22mm. I cant shift
the 22mm bolt. Any sugestions?
Thanks
Tim
–
Tim King
===================================================
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