[AT] Off Topic 2001 Ford F250 6.8L engine. Oil pressure gage port size.

[Thomas O Mehrkam]

Oil pressure followup.

Oil pressure specifications. Engine at temperature 200F, 2000 rpm 
pressure between 40 and 75 psi.  Mine is at 53 psi.   Not bad for 
240,000 miles.

I found a oil pressure test set at harbor freight.  $27.  It had a 
gauge, 5 1/2 ft hose and a bunch or adapters.  It could use some type of 
swivel. I had to crawl under the truck and out from under it at least 
five times to relieve the torque on the hose to be able to thread in the 
gate. A swivel would have been much easier but it worked.  The gauge 
looped over the driver side mirror makeing it easy to perform the test.

http://www.harborfreight.com/catalogsearch/result?q=oil+pressure+tester

The pressure sender thread is 1/4 18 MPT  instead of NPT.  No O ring on 
the gas engine just some thread sealer.   It is a straight thread. The 
tester had a tapered thread and engaged two threads sealed fine for the 
test.

Pressure was 30 psi at 1000 rpm idle.  28 psi in gear at idle 700 rpm 
and 70 psi max wot.  I installed a new pressure switch and all looks 
fine.  Time to go hunting this weekend.  Yea.

Thanks for the help.  I tried to put a tester together from parts from 
Northern Tool but they did not have the proper gauge in stock so the 
Harbor Freight it was. About the same price anyway.

ANTIQUE Tractor Reference.

I am moving a house on my 47 acres in Waller Texas.  When things dry out 
I will be using the Ford and trailer to move my Farmall H and blade to 
level the pad for the house.

On 12/14/2016 6:19 PM, Steve W. wrote:
> tmehrkam at sbcglobal.net wrote:
>> Thank you.
>>
>> For some reason I did not think about NAPA
>> Strange it says MPT which is a straight thread not tapered.
>>
> The actual unit in the engine nor has the same thread form as NPT, but
> it is a straight thread with an O-Ring that seats against the block to
> seal it. Only the OEM switch is made that way.
>