Tea20 oil pressure hand cranking

kaesark

Member
Well gave the motor a hand crank and checked the pressure gauge which registered about 25 on the gauge, I presume that that will increase once the motor is running proper. I'm wondering at what revs would you check the oil pressure to ascertain accuracy. What would be good pressure on a fully reconditioned motor.
Thanks.
 
I do not know what a TEA should be but a TO30 should be at 27 pounds. Your service book should tell you what yours should be.
 
Check the shop manual for the recommended pressure.

That will apply to the pressure at a given RPM with the engine up to operating temperature. That is where the relief valve adjustment will be set. That is if it has an adjustable relief valve. Otherwise it is preset with the proper spring.

What you have to be careful of, possibly as the engine was wearing down and loosing pressure, someone may have mistakenly decided stretching, shimming, or radically adjusting the relief spring would fix the problem. Now that everything is new again, that being done would cause excessive pressure, which can damage the bearings, blow the filter gasket, or twist off the pump drive.

If you can't find the recommendation, general rule of thumb, 10 PSI pressure for 1000 RPM is desirable. If it will idle warmed up with as little as 4-5 PSI, it will be fine.
 
(quoted from post at 02:21:45 05/11/18) Well gave the motor a hand crank and checked the pressure gauge which registered about 25 on the gauge, I presume that that will increase once the motor is running proper. I'm wondering at what revs would you check the oil pressure to ascertain accuracy. What would be good pressure on a fully reconditioned motor.
Thanks.

The TEA has a safety valve in the filter housing that will send unfiltered oil back to the sump if the filter is clogged. It is set at somewhere between 40 and 60 PSI. If your pressure is "normally" to high, this will happen also.

There is a pressure adjusting screw with a lock nut on the top of the filter housing. It should normally have about 7 threads showing. As the engine wears, it can be adjusted CW to increase the pressure a little.

So, normal cold should be about 25 to 40 PSI, with about 25 being normal on a hot engine working hard. A hot engine at idle newly rebuilt should be about 10 to 15 PSI. But, as said, even 5 PSI is acceptable,

I ran mine for 30+ years with only 5 PSI at hot idle.
 
Hi Ron
Checked the relief valve and have 7 threads showing, the manual confirms oil pressure at 2,000 rpm being 40-60 lbs.
I was interpreting that 40-60 to be mirrored on the oil gauge is this not the case then as some suggest a lot lower reading on the gauge as being acceptable.
Thanks
 
(quoted from post at 14:29:20 05/11/18) Hi Ron
Checked the relief valve and have 7 threads showing, the manual confirms oil pressure at 2,000 rpm being 40-60 lbs.
I was interpreting that 40-60 to be mirrored on the oil gauge is this not the case then as some suggest a lot lower reading on the gauge as being acceptable.
Thanks

I am not sure exactly what you are asking. :? But, what I do is set the cold start up oil pressure to around 50 PSI to ensure that I get around 25 PSI when working at 2000 RPM and engine hot. The drop from 50 to 25 is normal even on a newly overhauled engine.
 
Oil flow Info:


Bob...Owner operator TEA-20......
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Ok so I am to expect a drop in oil pressure
once the engine and oil reaches operating
temperature.
I was thinking that the pressure relief
valve would have maintained a reasonably
steady pressure regardless of engine/oil
temperature of around 40lbs but from what
others say this is not the case .
Thanks
 
(quoted from post at 13:48:37 05/12/18) I was thinking that the pressure relief valve would have maintained a reasonably steady pressure regardless of engine/oil
temperature of around 40lbs but from what others say this is not the case .Thanks

No the pressure valve is to prevent oil starvation if the filter gets plugged. With a dirty filter the pressure would appear to rise but you would lose oil flow. So, at 40-60 PSI the valve opens and releases dirty oil into the sump.
 

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