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richierich Samba Member
Joined: December 23, 2004 Posts: 887
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Posted: Sun Jun 26, 2016 11:40 am Post subject: Couple of (possibly stupid) q's about cranking for oil pressure |
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Ok - just about to install motor that sat on stand for 6 months. Have filled the motor and external filter with oil, put a little oil into each cylinder and then will install the motor into the car, pull the plugs, coil middle and oil pressure switch.
Question 1 - (possibly stupid!) Can i crank for pressure without the inlets/carbs bolted up? - just to ease the pain of replacement of spark plugs with carbs (48's) in.
Question 2 - once oil comes out of the oil pressure switcn the motor is primed right?[/i] |
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the2ndcashboy Samba Member
Joined: March 19, 2007 Posts: 827 Location: Houston
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Posted: Sun Jun 26, 2016 11:44 am Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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#1: probably the best way to do it, since you don't want to be sucking fuel into the engine unless it's getting burned. I usually build oil pressure and break the cam in on the ground before I put the motor in, but if you don't have a run stand or spare tranny that won't work for you.
#2: yes, more or less. I'd put the switch back in and crank another 5-10 seconds so you know it's made it to the bearings too.
I will add that I've had good results packing the oil pump with grease. Helps create a good suction, especially if your pump is on the loose side. _________________
SRP1 wrote: |
You see....... He talks in code and translation requires a priest, geologist, astronomer, biophysicist, and Indiana Jones. |
modok wrote: |
If anything comes out perfect it just means your measuring tools are substandard. |
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richierich Samba Member
Joined: December 23, 2004 Posts: 887
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Posted: Sun Jun 26, 2016 1:48 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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Makes sense on the carbs thing. What type of grease do you pack the pump with? |
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stan_tichomirov Samba Member
Joined: May 24, 2005 Posts: 1719 Location: San Francisco, CA
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Posted: Sun Jun 26, 2016 2:02 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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I stopped putting grease in the pump a while ago (assembly moly grease). I just use thick oil on the gears when putting them in, or the red assembly lube. Primes just fine.
Last time I did it with plugs installed, and dual springs. Starter was weak (dying), but still primed fine.
Stan _________________ Aircooled.net
Jansen Enterprise
My 1835cc build
My budget 2276 build |
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richierich Samba Member
Joined: December 23, 2004 Posts: 887
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Posted: Sun Jun 26, 2016 2:22 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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Thanks for the advice Stan and excuse me here but I thought I was supposed to have plugs out? The motor is not a fresh build but has been on the stand for 6 months. Do I still need to oil the gears? |
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vwracerdave Samba Member
Joined: November 11, 2004 Posts: 15280 Location: Deep in the 405
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Posted: Sun Jun 26, 2016 3:10 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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richierich wrote: |
The motor is not a fresh build but has been on the stand for 6 months. |
Forget about all the witchcraft VooDoo magic. Put everything together and start the engine up. _________________ 2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK
Featured in Dec. 2001 HOT VW's Magazine page 63
Watch my racing video's http://www.youtube.com/user/okvwracer/videos |
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jfats808 Samba Member
Joined: December 10, 2007 Posts: 5022 Location: oahu hawaii
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Posted: Sun Jun 26, 2016 3:20 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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All you need is the pump and lines to be air bound and have a pocket of air that limits pressure. Do what is necessary and not make your money burn to guarantee that engine doesn't sieze.
In fact air bounding happened on an engine I broke in yesterday when I took off the oil pump mating surface leak from casting flash. _________________ 2276 IDA's 86C 11-1 DD !
2017 48 Trijet DRLA's W125
Rockstar Suzuki wrote: |
You might as well put 10 year build in your bullshit sig, as it will NEVER run. Also your a dick |
You can always learn something new, even from a fool.
Check your oil levels routinely! |
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richierich Samba Member
Joined: December 23, 2004 Posts: 887
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Posted: Sun Jun 26, 2016 3:29 pm Post subject: Re: Couple of (possibly stupid) q's about cranking for oil pressure |
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Dave - i tend to take that view but i dont want to **** this up!
Jfats - I'm not 100% sure what is necessary.......that's why I am asking....... |
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