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Steve M.
Samba Member
Joined: July 30, 2013
Posts: 6829
Location: Fort Lauderdale, Fl.
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 Posted: Sun Dec 05, 2021 9:59 pm Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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| DuncanS wrote: |
| Steve M. wrote: |
Or put an Anti-theft kill switch on the line from the ignition coil to the Tachometer and you could turn the engine over without starting and build up oil pressure.
Or a kill switch on the fuel pump. would allow you to do the same and have an anti-theft switch as well. |
How does that keep the engine from running? My car was driven for several hundred miles this summer with no dash panel in at all while working on redoing foil wiring.
Duncan |
What you need to do if you use the green wire going to the tachometer from the ignition coil is to use a switch that will send the tach signal to ground. Once it grounds out the coil will not send spark to the distributor and without that it is not going to start. It will turn over as normal, but just not start. I've also driven without the instrument cluster installed and aside from not having the instruments the engine will still run as normal.
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kamzcab86
Samba Moderator
Joined: July 26, 2008
Posts: 7916
Location: Arizona
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| Posted: Sun Dec 05, 2021 10:13 pm Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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| Steve M. wrote: |
...you could turn the engine over without starting and build up oil pressure.
Or a kill switch on the fuel pump. would allow you to do the same and have an anti-theft switch as well. |
My 2.1 WBX will start and run for a couple of seconds with the fuel pump kill switch engaged. So, if the goal is to not start the engine, a fuel pump kill switch probably isn't the best way. 
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1986 Cabriolet: www.Cabby-Info.com
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"Real knowledge is to know the extent of one's ignorance." - 孔子 |
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DuncanS
Samba Member
Joined: October 17, 2013
Posts: 4583
Location: New Hampshire
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| Posted: Mon Dec 06, 2021 1:24 am Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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Thanks, Steve. My redone dash has rotary switches and sending the tach signal to ground would be an easy theft proof thing to do. This will get serious consideration as who would think to rotate a knob to activate the coil? It also has the advantage of easily solving the valet problem as well. Just don't turn the switch to ground the tach lead.
Duncan |
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Steve M.
Samba Member
Joined: July 30, 2013
Posts: 6829
Location: Fort Lauderdale, Fl.
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| Posted: Mon Dec 06, 2021 7:18 am Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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| kamzcab86 wrote: |
| Steve M. wrote: |
...you could turn the engine over without starting and build up oil pressure.
Or a kill switch on the fuel pump. would allow you to do the same and have an anti-theft switch as well. |
My 2.1 WBX will start and run for a couple of seconds with the fuel pump kill switch engaged. So, if the goal is to not start the engine, a fuel pump kill switch probably isn't the best way. |
Yeah you're right. Forgot about the fuel in the lines 
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Steve M.
Samba Member
Joined: July 30, 2013
Posts: 6829
Location: Fort Lauderdale, Fl.
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| Posted: Mon Dec 06, 2021 7:20 am Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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| DuncanS wrote: |
Thanks, Steve. My redone dash has rotary switches and sending the tach signal to ground would be an easy theft proof thing to do. This will get serious consideration as who would think to rotate a knob to activate the coil? It also has the advantage of easily solving the valet problem as well. Just don't turn the switch to ground the tach lead.
Duncan |
What British Sports car of the 60's gave you this idea? 😁
Sent you a pm.
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jberger
Samba Member
Joined: November 17, 2003
Posts: 2476
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| Posted: Mon Dec 06, 2021 12:26 pm Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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Was your oil pick-up tube O-ring replaced?
J |
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zopapp
Samba Member
Joined: September 28, 2017
Posts: 21
Location: Budapest Hungary
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| Posted: Mon Dec 06, 2021 2:05 pm Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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Hello J,
Yes, the pick-up tube O ring was replaced.
Cheers,
Zoltan |
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jberger
Samba Member
Joined: November 17, 2003
Posts: 2476
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| Posted: Mon Dec 06, 2021 2:23 pm Post subject: Re: no oil pressure at start for a few seconds 2.0 AC |
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| zopapp wrote: |
Hello J,
Yes, the pick-up tube O ring was replaced.
Cheers,
Zoltan |
Well.. at least there's that.
I'd measure the oil pump bore against the oil pump body diameter. Was it easy to remove? While I haven't had the issue myself I've heard of poorly mated bores that allow a vacuum on the oil pick-up side and invariably the output side as well. To combat this I always install my oil pumps (without studs) as I'm assembling the case halves with a ring of sealant around both inlet and outlet ports. Obviously you can't do this now. You could machine an o-ring toward the leading edge of the pump body to seal the pump from the crank case. I believe some vendors are doing this as well. For what it's worth, I also scribe the ports and grind the case to match, you'd be surprised out off they can be.
J |
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