[Mg-mmm] Water in the sump

[Bob Grunau]

I too am familiar with the unfortunate water in oil problem on NA-0686. The
previous owner had the engine rebuilt at great expense. The original block
had been frost damaged way back in the UK and then repair welded. Who knows
how well the weld was done. Then the engine had a VERY expensive rebuild by
an infamous big high dollar shop in Mass. They bored the block so
essentially there was no original block wall left in the cylinders ( I have
photos to prove this ).  Then installed sleeves.  Sleeves leaked water into
the oil almost immediately around the lower joint to block face. A Mickey
Mouse attempt was made to seal off the leaking sleeves using some gook ( JB
Weld ? ) slathered on the underside of the block in the sleeve area. Not
successful.
 I bought the car knowing it needed serious block and engine work. I
immediately decided to buy a new reproduction block from the UK and it was
delivered yesterday. Block is all drilled and tapped and looks good. Now all
we have to do is install all the parts into the new block.
I also, decided having gone this far, to buy a new Phoenix crankshaft looks
really good. The original crank had been used in the expensive bad rebuild.

I would pressure test the water system and see where the water is leaking.
If the sleeves are leaking, or the block was repair welded, maybe time for a
new block.

It is possible for the water pump seal to allow water to leak into the sump.
Hopefully that is your problem.

I would pull the sump before pulling the head. Then pressurize the cooling
system and look for leaks around the cylinder bores or sleeves.
Good luck,
Bob Grunau
NA-0686 with engine removed.

-----Original Message-----
From: mg-mmm-bounces at autox.team.net
[mailto:mg-mmm-bounces at autox.team.net]On Behalf Of Lew Palmer
Sent: Friday, April 17, 2009 2:43 PM
To: TATERRY at aol.com; mg-mmm at autox.team.net
Cc: MMMGservice at aol.com
Subject: Re: [Mg-mmm] Water in the sump


Was that block bored and sleeved? Did the boring enter the water jacket?

I have a block that was (before I owned it) overbored and sleeved, but the
sleeves were not properly sealed. When the radiator was filled, it was easy
to tell when the radiator was full -- the excess came out the crankcase
vent.

Cheers,
Lew

-----Original Message-----
From: mg-mmm-bounces at autox.team.net [mailto:mg-mmm-bounces at autox.team.net]
On Behalf Of TATERRY at aol.com
Sent: Friday, April 17, 2009 12:39 PM
To: mg-mmm at autox.team.net
Cc: MMMGservice at aol.com
Subject: [Mg-mmm] Water in the sump

Folks, I sent out this plea to a couple of N type owners, but I thought I
try the list to see if there is more suggestions....one is that its the
water
pump seal that is leaking....I will investigate, but what would you suggest
as a way forward?

I decided to roll out the NA this morning to see if it still runs....before
I started it up, I decided to check the oil and water...oil started oouzing
up out of the dip stick hole....thats odd, I thought!  Then check the
water, all gone.....so with my sucker thing that I use to change oil on the
boat,
I pullled a good 5 quarts of water out of the sump.  Then did the sucker
thing on the spark plug holes....nothing there.  So the question is, how did

the water get into the sump?

Ideas?  Has the old block cracked again and if so, how do you check for
that??    What else should I check before pulling the head?

Terry

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