 Crank engine to build up oil pressure |
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| burlybryan |
 Oct 10 2026, 02:30 PM
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#1
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Member  Group: Members Posts: 179 Joined: 25-May 20 From: Saint Paul Member No.: 24,311 Region Association: None 
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I'm wrapping up installing my rebuilt 2 liter with djet. I want to crank it to circulate some oil without fuel. Can i just pull the fuel pump relay and turn on the ignition or will that disable more than the pump?
Thanks. |
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| 930cabman |
Oct 10 2026, 02:38 PM
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#2
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Advanced Member Group: Members Posts: 4,867 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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I would also remove the spark plugs
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| emerygt350 |
Oct 10 2026, 02:44 PM
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#3
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Advanced Member Group: Members Posts: 3,793 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Or you could pull the fuse on the board. It's the one closer to the rear of the car.
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| porschetub |
Oct 12 2026, 10:58 PM
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#4
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914 Guru Group: Members Posts: 5,190 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(burlybryan @ Oct 11 2026, 09:30 AM)  I'm wrapping up installing my rebuilt 2 liter with djet. I want to crank it to circulate some oil without fuel. Can i just pull the fuel pump relay and turn on the ignition or will that disable more than the pump? Thanks. Good idea after disconnecting the coil wires and pulling FP relay is to fit an oil pressure gauge and extention hose ,with plugs out and a good battery you should get quick suction and gauge climbing in pressure ,I got 72lbs total on my last topend build with new std rod bearing and good stock oil pump with 20/50 oil. The gauge and line are cheap insurance afterall ,good luck ,cheers. |
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| burlybryan |
Oct 13 2026, 08:23 AM
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#5
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Member Group: Members Posts: 179 Joined: 25-May 20 From: Saint Paul Member No.: 24,311 Region Association: None
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QUOTE(porschetub @ Oct 12 2026, 11:58 PM) QUOTE(burlybryan @ Oct 11 2026, 09:30 AM) I'm wrapping up installing my rebuilt 2 liter with djet. I want to crank it to circulate some oil without fuel. Can i just pull the fuel pump relay and turn on the ignition or will that disable more than the pump? Thanks. Good idea after disconnecting the coil wires and pulling FP relay is to fit an oil pressure gauge and extention hose ,with plugs out and a good battery you should get quick suction and gauge climbing in pressure ,I got 72lbs total on my last topend build with new std rod bearing and good stock oil pump with 20/50 oil. The gauge and line are cheap insurance afterall ,good luck ,cheers. Thanks. Stupid question - but what would I attach a hose to? It's a closed system, so there aren't any oil hoses to tap like a fuel pressure gauge. Maybe this is what to do on a 6? In any event, fuse out, plugs out and no coil, wire it cranked well. Actually, it didn't turn over at all at first, but then I realized that I had one last remnant of DPO's conversion to carbs - they had cut and tapped the starter wire at the ignition for a separate power lead to the relay board. I had cleaned up the board end and returned to stock, but hadn't yet pulled the lower dash pad and chased the auxiliary wire. Removed and remade the starter wire connection and all is good. |
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| Jack Standz |
Oct 13 2026, 09:40 AM
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#6
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Senior Member Group: Members Posts: 969 Joined: 15-November 19 From: Happy Place (& surrounding area) Member No.: 23,644 Region Association: None
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You could use an oil pressure test kit or gauge like this one:
https://www.harborfreight.com/engine-oil-pr...-kit-62621.html You screw it into the case (with the correct threaded adapter) where the oil pressure sender goes which is by the distributor. |
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| IronHillRestorations |
Oct 13 2026, 10:14 AM
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#7
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I. I. R. C. Group: Members Posts: 6,958 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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I’d pull the spark plugs and disable the fuel pump, and crank it in 15 second intervals until the oil pressure warning light goes out.
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