[xj40] Looking for some engine block assistance

Does anyone have any experience with (or pictures of) the
AJ6 engine block?

I’m fighting an oil leak on my '97 that appears to be at the
rear of the oil gallery and the good folks over on the X300
forum have been unable to assist.

Since the engine is so closely related to the AJ6, thought
I’d ask here.

I expect I’ll be dropping the transmission but it would be
nice to have a good idea of what I’m getting into before I
begin.

The leak is well below the cylinder head, inboard of the
starter, between the engine block and transmission adapter
plate. Way too high to be from the rear main seal. Seems
exactly in-line with the oil gallery that includes the oil
pressure switch.

I suspect there’s some type of plug at the back of the block
from the original manufacturing and machining of the block.

Many thanks!–
91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
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In reply to a message from Win sent Thu 10 Nov 2011:

Win,

There is a plug (EAC2494) with an ‘O’ ring (EAC2495) at
either end of the oil gallery.

Enter those part numbers in the ‘search’ box on the JDHT
parts catalogue contents page to see the picture - and note
there are two of each per engine, one front, one back.

http://www.jaguarclassicparts.com/html/JCPFrames.html?languageId=0&Country=UnitedKingdom&applicationType=JCP--
The original message included these comments:

The leak is well below the cylinder head, inboard of the
starter, between the engine block and transmission adapter
plate. Way too high to be from the rear main seal. Seems
exactly in-line with the oil gallery that includes the oil
pressure switch.
I suspect there’s some type of plug at the back of the block
from the original manufacturing and machining of the block.


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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In reply to a message from Bryan N sent Thu 10 Nov 2011:

Bryan,

I’ve looked at that picture, and since I was focused on the
rear of the block, missed the front.

Something about can’t see the forest for all the trees maybe?

Think I’ll pop up to the local Jag dealer to see if they’ve
got the o-ring, if not, will call the good folks at Coventry
West.

Worst comes to worst, will try to match up a seal at a local
auto parts store.

One thing for sure, this will not be a fun oil leak to cure.

I wonder if the rear main seal is part of the adapter plate
or if it’s still retained on the block when the plate is
removed. Might source and have one on hand just in case,
Not sure I’d be comfortable digging in that deep to the rear
of the engine, disturb that seal and not replace it.–
The original message included these comments:

There is a plug (EAC2494) with an ‘O’ ring (EAC2495) at
either end of the oil gallery.
Enter those part numbers in the ‘search’ box on the JDHT
parts catalogue contents page to see the picture - and note
there are two of each per engine, one front, one back.
http://www.jaguarclassicparts.com/html/JCPFrames.html?languageId=0&Country=UnitedKingdom&applicationType=JCP


91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
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In reply to a message from Win sent Thu 10 Nov 2011:

Found the answer, on the AJ6, the rear main seal has it’s
own retainer, on the AJ16, it’s retained by the transmission
adapter.

Hoping the dealer has both the seal and o-rings in stock,
I’m free this Sunday, would be nice to get the X300 back on
the road without a very embarrassing trail of oil behind it.–
The original message included these comments:

I wonder if the rear main seal is part of the adapter plate
or if it’s still retained on the block when the plate is
removed. Might source and have one on hand just in case,
Not sure I’d be comfortable digging in that deep to the rear
of the engine, disturb that seal and not replace it.


91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
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In reply to a message from Win sent Thu 10 Nov 2011:

Just a thought, If above the bellhousing maybe get a wrench on it
so not to disturb anything?

Darrell–
The original message included these comments:

I’ve looked at that picture, and since I was focused on the
rear of the block, missed the front.


95 X-300 02 VDP http://www.jag-lovers.org/v.htm?1287957641
Delavan Wi., United States
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In reply to a message from Win sent Thu 10 Nov 2011:

Win,

Just another thought (always looking for the easy solution!)
but is it at all possible that the leak could be from the
plug - items 11 & 12 in that picture - which also goes
straight in to the oil gallery, so that the oil gets blown
back in to the area from which you believe it is leaking?–
The original message included these comments:

Found the answer, on the AJ6, the rear main seal has it’s
own retainer, on the AJ16, it’s retained by the transmission
adapter.
Hoping the dealer has both the seal and o-rings in stock,
I’m free this Sunday, would be nice to get the X300 back on
the road without a very embarrassing trail of oil behind it.


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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In reply to a message from Bryan N sent Thu 10 Nov 2011:

Bryan,

I wish it was that simple but no, on my X300, that’s where
my oil sending switch is and it’s dry and clean.

Had to resort to cleaning the engine, putting the car up on
stands and getting under the car with the engine running.

The oil simply starts oozing from the seam between the
engine block and transmission adapter right there at the oil
gallery. Give the bottom rear edge of the oil gallery a
wipe with a cloth and I could watch the oil start to ooze out.

I cannot imagine the rear seal causing a leak that high on
the block and above the bell housing, the engine is free of
‘‘wet’’ oil.

Had a heck of a time with the local Jaguar dealer but the
sales guy finally found the parts I was asking for, should
be here tomorrow.

He was very apologetic that I’d have to buy 5 of the o-rings
at $3.00 each but I’m still ahead in time and money from
going mail order. Still, I’ll have the rear main and the
oil gallery seal for about $65.00 and I’m OK with that.

Just for a laugh, I did ask about the same seals for an
early Aston DB7 3.2. Had a hard time convincing him the
Aston 3.2 was a reworked Jaguar 3.2. Much to my surprise,
they had the seals in stock, but if you’ve got to ask how
much, you can’t afford them! Must be some very nice
packaging.–
The original message included these comments:

Just another thought (always looking for the easy solution!)
but is it at all possible that the leak could be from the
plug - items 11 & 12 in that picture - which also goes
straight in to the oil gallery, so that the oil gets blown
back in to the area from which you believe it is leaking?


91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
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In reply to a message from Darrell G sent Thu 10 Nov 2011:

Daryl,

It’d be nice if the leak was above the bell housing, but no
such luck. In fact, if I’m seeing the parts correctly, the
transmission adapter physically holds the plug in place.
The plug is not threaded and does not have a dedicated retainer.

No option, the trans and transmission adapter plate have to
come out. Hey, could be worse! The weather is simply
beautiful, no blazing sun, no blizzard – the kind of
weather that makes Florida a haven from the winter weather.–
The original message included these comments:

Just a thought, If above the bellhousing maybe get a wrench on it
so not to disturb anything?
Darrell


91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
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In reply to a message from Win sent Thu 10 Nov 2011:

Win,

Sorry it wasn’t that simple! :frowning:

Yes, I bet the Aston Martin spares are gold plated - or the
box is.

You may remember my story about the wheel (lug) bolt my
son’s Ferrari - over $100 USD EACH from the dealer - and
they don’t even come in a box, but you do get a nice little
bag with the prancing horse motif!–
The original message included these comments:

Just for a laugh, I did ask about the same seals for an
early Aston DB7 3.2. Had a hard time convincing him the
Aston 3.2 was a reworked Jaguar 3.2. Much to my surprise,
they had the seals in stock, but if you’ve got to ask how
much, you can’t afford them! Must be some very nice
packaging.


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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In reply to a message from Bryan N sent Thu 10 Nov 2011:

OUCH! And here I thought the price for the forged aluminum
lug nuts on my Lotus were expensive! (of course, I’ve taken
care not to loose any of them either!)

Even having to purchase 5 of the Jaguar seals for the oil
gallery plug the cost was significantly lower than the
single in the Aston Martin package.

Yea, I know I could probably match up the o-ring at a parts
house, but I’d rather know I’ve got the exact one in place
than hope the one I found is ‘‘close enough’’.–
The original message included these comments:

Yes, I bet the Aston Martin spares are gold plated - or the
box is.
You may remember my story about the wheel (lug) bolt my
son’s Ferrari - over $100 USD EACH from the dealer - and
they don’t even come in a box, but you do get a nice little
bag with the prancing horse motif!


91 XJ6, 97 Sov – Driveway needs another!
Tampa Fl, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !