7MGE Engine rebuild

oregonjoe · 09-23-2009, 03:38 PM

Before I installed the throttle body, I pulled the spark plugs and connected the battery to give the engine a spin to see if I got any oil pressure.

Engine spun but pressure on the gauge. This drew concern since I wanted to be sure I had oil flowing in all the bearings before I started it up.

Checked the panel meter by grounding the lead and it pegged high so I know that was OK.

Then put a OHM meter on the Oil Sender and it read 5.7K which is not what I am used too from oil senders (usually read 30 to 240 Ohms). Kept the Ohm meter on the sender and spun the engine, it read 5.4K, still not right.

Then I read through the TFSM and it did not have any resistance specs for the Oil sender but said it would pulse at different rates to give pressure? HUM?

It did say idle was about 4 PSI and under load about 70 PSI so I would suspect starting would be a lot less then 4 PSI and not move the gauge at all?

Wish I had a mechanical gauge to check against – There is no real way to see if oil is moving around before fire-up?

09-23-2009, 03:38 PM	#39
oregonjoe 3" Exhaust Join Date: Aug 2009 Location: Southern Oregon Coast Posts: 83	No Oil Pressure Before I installed the throttle body, I pulled the spark plugs and connected the battery to give the engine a spin to see if I got any oil pressure. Engine spun but pressure on the gauge. This drew concern since I wanted to be sure I had oil flowing in all the bearings before I started it up. Checked the panel meter by grounding the lead and it pegged high so I know that was OK. Then put a OHM meter on the Oil Sender and it read 5.7K which is not what I am used too from oil senders (usually read 30 to 240 Ohms). Kept the Ohm meter on the sender and spun the engine, it read 5.4K, still not right. Then I read through the TFSM and it did not have any resistance specs for the Oil sender but said it would pulse at different rates to give pressure? HUM? It did say idle was about 4 PSI and under load about 70 PSI so I would suspect starting would be a lot less then 4 PSI and not move the gauge at all? Wish I had a mechanical gauge to check against – There is no real way to see if oil is moving around before fire-up?