Oil Pressure

[Bob Grunau]

I would:
1-change oil filter if not done already ( good time to change to a modern
spin-on adapter).
2-change oil to 20W-50 ( as others have suggested).
3-after engine is warm, block off oil line to head, if pressure increases
dramatically rocker shaft/bushings are worn.
4-drop sump and clean oil strainer.
5-remove oil pump and check gear end clearance to specification of 0.0016 to
0.0035".
6-check relief valve ball OK, no grooves.

If still no improvement in hot oil pressure, a full engine rebuild may be
required. I personally would not drive the car far or fast with 30 psi oil
pressure.
Regards, Bob
Bob Grunau
150 Pinewood Trail,
Mississauga, Ontario,
Canada, L5G-2L1


-----Original Message-----
From: Dr J [mailto:dr.j@primus.ca]
Sent: Monday, May 24, 2004 2:31 PM
To: mg-tabc@yahoogroups.com
Subject: [mg-tabc] oil pressure


members
oil pressure cold is 75-85 pounds,after warmup drops back to 30pounds
plan to have complete evaluvation in the fall
using 10w-30oil,any suggestions re changing oil viscosity?
thanks DR J tc-6993 arnprior canada


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[paroor@t-online.de]

Dear All,
How can one make sure that the oil pump is working, before
starting the first time after engine rebuild ?
I removed the plugs, Filled the new oil filter with oil, and then run the
starting motor few seconds. The original staring motor is not that strong. I
supported with the starting handle. Removed the pipe to the oil pressure
gauge. No oil is flowing out. May be it was only very few revolutions.

If I can transport the car to the brake test bench in the work shop, may be
I can use the rear wheels to turn the engine till oil pump builds up oil
pressure.

Or am I exaggerating the things ?

Should I take the risk and start for few seconds ?

Please advise from your experience.

Thank you
TC 0448
Madhu

[SANDY SANDERS]

Madhu; I use a garden sprayer for a pressure-pot. adapt a fitting to the oil pressure output. Put your oil in the can, pump it up and lock the handle open. All the oil will be forced throughout the engine. This fill all passages with oil before even turning the motor over. You can if you wish during this pressure feeding is to turn the engine over by hand crank.
Sandy Sanders
Hudson Florida

----- Original Message -----
From: paroor@t-online.de
To: mg-tabc@yahoogroups.com
Sent: Tuesday, September 14, 2004 3:23 PM
Subject: [mg-tabc] Oil pressure



Dear All,
How can one make sure that the oil pump is working, before
starting the first time after engine rebuild ?
I removed the plugs, Filled the new oil filter with oil, and then run the
starting motor few seconds. The original staring motor is not that strong. I
supported with the starting handle. Removed the pipe to the oil pressure
gauge. No oil is flowing out. May be it was only very few revolutions.

If I can transport the car to the brake test bench in the work shop, may be
I can use the rear wheels to turn the engine till oil pump builds up oil
pressure.

Or am I exaggerating the things ?

Should I take the risk and start for few seconds ?

Please advise from your experience.

Thank you
TC 0448
Madhu







Yahoo! Groups Links







[Non-text portions of this message have been removed]

[Donald Wilkinson]

Madhu:

digitaldon always connects an electric motor driven gear pump to the oil
gallery of any engine before flashin' it up for the first time. Been doin'
this for many years since first turned on to it by Cummins Engine Co. in
their engine manuals. De rigeur for any large diesel, & a damn good idea
after rebuilding any engine.

Don
TC 7993




Dear All,
How can one make sure that the oil pump is working, before
starting the first time after engine rebuild ?
I removed the plugs, Filled the new oil filter with oil, and then run the
starting motor few seconds. The original staring motor is not that strong. I
supported with the starting handle. Removed the pipe to the oil pressure
gauge. No oil is flowing out. May be it was only very few revolutions.

If I can transport the car to the brake test bench in the work shop, may be
I can use the rear wheels to turn the engine till oil pump builds up oil
pressure.

Or am I exaggerating the things ?

Should I take the risk and start for few seconds ?

Please advise from your experience.

Thank you
TC 0448
Madhu







Yahoo! Groups Links

[paroor@t-online.de]

Dear All,
I was able to start the TC 448 engine today afternoon for some minutes.
Happy to hear the XPAG sound. The engine is quite smooth with out any
unhealthy sound. Before starting I loosened the oil pipe connection to the
cylinder hear and cranked the motor by hand. Oil was flowing out. The pipe
connection to the pressure gauge was empty. So it took a while to show
pressure. After starting the pressure gauge slowly increased only up to 40.
After removing the valve cover saw only a bit of oil on the cylinder head.
Run the engine again with out valve cover. The rocker shaft was not throwing
oil out.
The question ? Is it normal ? I thought there must be a lot of oil
splashing in the valve cover. Before running the engine next time I want to
make sure that the rocker arm is getting enough oil supply. How do I proceed
?
Any advise from the respected and experienced members ?
Thank you
madhu

[Gene Gillam]

Madhu asked:

>After removing the valve cover saw only a bit of oil on the cylinder
>head. Run the engine again with out valve cover. The rocker shaft was
>not throwing oil out....The question? Is it normal?<

Madhu,

No, it's not normal. It sounds as if you have the rocker arm shaft
reversed or the rear pedestal oil passage is blocked. The oil feed to
the shaft comes from the rear pedestal - if the shaft is reversed the
hole that should be lined up with the oil feed from the pedestal is at
the wrong end - hence no oil flow through the rockers. It's a quick and
easy fix and you should done in an hour or so.

Best,

Gene Gillam
Saucier, MS


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[David Lodge]

Hello Madhu,

Congratulations on the start-up!, but I suspect something might
be amiss! In my callow youth I read as gospel the injunction in
all the Brit DIY motoring mags to adjust the tappet clearance
with the engine running! Result....Oil City, Arizona, which
necessitated a complete change of clothes after each attempt.
During the engine rebuild, did you align the oil delivery hole in
the rocker shaft pedestal with the ditto in the rocker shaft?
Been there, didn't do that!

Regards, David Lodge






----- ORIGINAL MESSAGE -----
From: paroor@t-online.de
To: mg-tabc@yahoogroups.com
Subject: [mg-tabc] Oil pressure
Date: 5.10.2004 - 21:44:06

>
>
> Dear All,
> I was able to start the TC 448 engine today afternoon
> for some minutes.
> Happy to hear the XPAG sound. The engine is quite
> smooth with out any
> unhealthy sound. Before starting I loosened the oil
> pipe connection to the
> cylinder hear and cranked the motor by hand. Oil was
> flowing out. The pipe
> connection to the pressure gauge was empty. So it took
> a while to show
> pressure. After starting the pressure gauge slowly
> increased only up to 40.
> After removing the valve cover saw only a bit of oil on
> the cylinder head.
> Run the engine again with out valve cover. The rocker
> shaft was not throwing
> oil out.
> The question ? Is it normal ? I thought there must be a
> lot of oil
> splashing in the valve cover. Before running the engine
> next time I want to
> make sure that the rocker arm is getting enough oil
> supply. How do I proceed
> ?
> Any advise from the respected and experienced members ?
> Thank you
> madhu
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

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[paroor@t-online.de]

Dear all,
Before rebuilding the engine all the parts were cleaned well by
mechanic Siggi in the machine shop. But he checked the rocker assembly for
play or mechanical defect. All tolerance were fine and it was looking good.
So he cleaned the assembly only externally. It was the mistake.

I took the 14" rocker shaft and pedestal out yesterday. The small rocker
shaft hole below was blocked. On the top all the holes were clean. Ian
Thomson was correct.

It is impossible at least for TC 0448 to assemble the rocker arm in the
wrong way. There are two slots on the shaft. The two washers on the pedestal
can only be pushed in there at one position before inserting the 10mm bolts.
So practically impossible to assemble the shaft in 180 position. The extern
the pedestals are similar and interchangeable. The middle ones are also
similar. The washers form them fall out easily. They are also
interchangeable.
Special thanks for Ian Thomson, Andy, Gene Gillam, Peter, and Skip Kelsey.

Madhu

[joecurto@aol.com]

To add a fly in the ointment, later TD/TF which has basically the same oil
pump as the TB/TC took the oil pressure reading from the rear of thr block at
the main gallery feed to the rocker assembly not at the cylinder head /rocker
feed. You will find about 15 PSI difference in readings. My personal opinion is
that the factory recommendation of 45 pounds hot running and 15-18 PSI at Idle
was to hard to attain so they moved the point of reading down to the main and
were now able to have the gauge reading match the book.

Joe Curto


[Non-text portions of this message have been removed]

[billsoquel]

My oil pressure also dropped 10-15 pounds to 40-42 pounds at normal engine temp, when I changed to the stainless steel braided lines. I had done nothing else, so it had to be the new oil lines. My MG TC guru said 40-42 pounds is fine, Not to worry.

I did purchase a new pressure oil spring, but it is still on the work bench. Will get to it and will comment to the group when I do.

Bill Webb
TC 3338

[Non-text portions of this message have been removed]