Prime the oil system?

[CWhalenSHO]

Might be a dumb question but here goes.......

My SHO has been sitting for quite sometime now without being started. Been taking my sweet time on a top 60K. The last time it was ran was this past March when I pulled it into the garage to start tearing it down.

Can I somehow spin the oil pump without actually turning the motor over to get oil flowing throughout the oil passages?
(Like a small block Chevy or Ford. Before installing the distributor using an electric drill an a distributor shaft to spin the oil pump)

I'm just concerned that after sitting for so long, the oil down at the bottom of the pan, it'll cause damage to the internals once I try to start it up. Or am I (and the motor) going to be OK?

Any help or advice is greatly appreciated.

 

[NotSoSlowSHO]

On the SHO, the oil pump is driven right off of the crank. So if the oil pump rotates, so must the crank.

If you want to prime the oil system without actually firing the motor, simply disconnect one of the plugs on the DIS on the intake crossover tube.

This will allow the motor to crank, pushing oil through the system, without actually starting the engine.

 

[yamahaSHO]

Just hold the throttle to the floor when cranking. This will cut fuel and relieve vacuum as well.

 

[1993MTXSHO]

****, when I did my engine I just dumped oil all over everything while I was putting it back together, but yeah that's about the best you're gunna get. Just do as yamahasho said, gas to the floor, but wait until the red oil pressure light turns off on the dash and you can let it fire.

 

[hawkeye18]

Some cars will still fire with the pedal to the floor. Not real common, but I'd want to find out in a situation where the rods might not be destroyed first. Unplug the DIS; it's the most sure-well, er, non-fire way to prime the oil pump. Just make sure you don't crank for too long!

 

[Racer X]

Some cars will still fire with the pedal to the floor. Not real common, but I'd want to find out in a situation where the rods might not be destroyed first. Unplug the DIS; it's the most sure-well, er, non-fire way to prime the oil pump. Just make sure you don't crank for too long!

Co-signed.

I found out the hard way that sometimes the car will still fire on a WOT crank.

 

[NebraskaSHO]

Both my SHO's crank without starting if the pedal is fully depressed.

 

[93rev2sev]

just disconnect the DIS AND floor it.

Wait for the low pressure light to go out and plug it back in. Run it for half an hour and change the oil.

 

[1993MTXSHO]

just disconnect the DIS AND floor it.

Wait for the low pressure light to go out and plug it back in. Run it for half an hour and change the oil.

+1 that is the best solution, it will cut fuel and spark

 

[yamahaSHO]

Some cars will still fire with the pedal to the floor. Not real common, but I'd want to find out in a situation where the rods might not be destroyed first. Unplug the DIS; it's the most sure-well, er, non-fire way to prime the oil pump. Just make sure you don't crank for too long!

The rods themselves are the main concern.

If your SHO starts with the throttle depressed, you have other issues that probably deserve more attention than 2 seconds of low oil.

 

[rubydist]

My view is that you should not crank it for more than 8-10 seconds at a time while pumping up the oil pressure. If the oil light doesn't go off in 10 seconds, wait 30 seconds and then repeat. That way you are sure nothing is overheated while you are in the process.

 

[yamahaSHO]

The only overheating I'd be worried about is the starter.

 

[1993MTXSHO]

The rods themselves are the main concern.

If your SHO starts with the throttle depressed, you have other issues that probably deserve more attention than 2 seconds of low oil.

agreed, a lot of these things seem to want to start when floored and they should not. I wonder if the same thing is wrong in all of the sho's that start while floored. I still didn't get a chance to mess with my 93, but when I find out what is causing my start while floored problem I will be sure to post

 

[CWhalenSHO]

Thanks to everyone who posted.

 

[Slo-Sho]

Holding the throttle wide open during cranking makes the upper rod bearings take a nasty beating from the piston trying compress all that air with no oil pressure, FYI.

 

[rubydist]

agreed, a lot of these things seem to want to start when floored and they should not. I wonder if the same thing is wrong in all of the sho's that start while floored. I still didn't get a chance to mess with my 93, but when I find out what is causing my start while floored problem I will be sure to post

The pcm needs to see WOT during cranking to cut off the injectors, so most likely either the tps isn't working right, or the throttle cable doesn't pull the throttle plate fully open.

 

[itwonder]

Pull the plugs, disconnect the DIS or coil pack, and spin it over until you have OP. The bearings are unloaded that way.

 

[SHOZ123]

The pcm needs to see WOT during cranking to cut off the injectors, so most likely either the tps isn't working right, or the throttle cable doesn't pull the throttle plate fully open.

I agreed. Sounds like a TPS problem if it starts when floored. Just be sure to keep it floored until you let go of the key. If you lift your foot and are still cranking it may start.

 

[thecrew2999]

Holding the throttle wide open during cranking makes the upper rod bearings take a nasty beating from the piston trying compress all that air with no oil pressure, FYI.

you lost me.. are you saying if you hold WOT your beating the bearings because of no oil pressure?

hows that possible there is no fuel being put into the system so it cant fire..
its like a air pump at that point... sure there is compressed air but there is no combustion, combustion will beat the bearings much worse then if you primed the oil first..

i know it dont matter too much but everytime i start my cars i hold WOT for like 10 - 15 seconds to get the oil splashing around.. i mean at 200 rpms is probley lucky to be 5 psi but its better then dry firing.

one of the things im buying next year is a canton racing pre oiler which also functions as a supply in case oil pressure drops below a set value... it can feed oil for up to 60 seconds on v8 engines in the event the oil pump failed.