oil pressure light/running hot

[brese73]

just did a top end rebuild on my AH 1600 DP. my oil pressure idiot light wont go off and the motor is running hot. has proper amount of oil and no leaks.

[brese73]

did some research. I need to check for grounds (recent new wire harness installed). need to check press sending unit switch, oil pump primed, oil pump screen. anything else I need to check?

[Air-Cooled Head]

Timing?
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[brese73]

AH case. 5 deg ATDC. Set with timing light.

[Randy in Maine]

Did you wrap the oil pressure sending units threads with teflon tape?

[brese73]

yes I wrapped the oil press sending unit with Teflon tape

[Randy in Maine]

Remove the teflon tape so that the sender will ground to the case and will actually work.

If you feel the need to put something on there, use a drop of locktite blue.

[Lingwendil]

[brese73]

Distributer: Bosh 113 905 205 T (has vacuum hose)
Carb : 34 Pict-3

I reset the timing. not running hot now.

However, I'm still getting no oil pressure. oil level good. no leaks. I removed the oil pressure sending unit. I cranked the motor and no oil was squirting out. Need to prime the oil pump?

[Randy in Maine]

You need to find a distributor that works with your carb's vacuum signature.

Find out why you are not getting any oil pressure. Pump not working with your camshaft? Oil pick up tube?

[brese73]

Think I found the problem. I removed the cover to the oil pump. There was oil in there. Then I turned the crank. The 2 gears didn't move. Oil pump shot? Is it a simple pull & replace?

[Randy in Maine]

Depends on what camshaft you have.

[Zundfolge1432]

Sounds like oil pump for a flat cam instead of dished. Pull the pump

[Zundfolge1432]

On the right the dished cam 71 and up uses 26mm oil pump
On the left the 61-70 flat cam uses 21mm oil pump
Use the early pump late cam no oil pressure
Use the late pump early cam engine seizes you ll never get past that point .

Has happened to the best of them they look similar yes?

[brese73]

ah. just did a little research. I see the difference. I bought this motor as a spare for $150. I cleaned up the heads. installed new rings. new seals. I guess the previous owner installed the wrong pump. fingers crossed there's no damage

[Cusser]

I once had a pump for straight cam used n a dished cam engine, only the pump gear got worn away, needed a replacement oil pump gear (longer type).
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[brese73]

i guess the biggest concern is if the slot in the cam is worn away. I should be able to determine this with the oil pump out? So I need a 26mm pump (long) for the dished cam? Is there anything else I need to specifically look for so my new oil pump is correct?

[Cusser]

[brese73]

How do I know whether to use a 26mm or 30mm oil pump for dished cams?

[brese73]

I got it all sorted out. just ordered a 26mm oil pump for dished cam along with a pump puller and new seal nuts. thanks for the help. I'll post end results