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Pre Oiling 3800 by Lou6t4gto
Started on: 07-25-2013 12:42 PM
Replies: 8 (240 views)
Last post by: DefEddie on 07-26-2013 10:00 PM
Lou6t4gto
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Report this Post07-25-2013 12:42 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
Fresh 3800 shortblock series 2. Is the only way of Pre Oiling this to spin it over with the starter ? Thanks
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aaronkoch
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Report this Post07-25-2013 12:58 PM Click Here to See the Profile for aaronkochClick Here to Email aaronkochSend a Private Message to aaronkochEdit/Delete MessageReply w/QuoteDirect Link to This Post
Since the oil pump is driven by the crank, yes. Pull the spark plugs, squirt some oil in the holes, and spin the motor. There isn't much load on it without compression, and the oil pressure builds quickly.

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Build thread for my 88 + 3800NA swap

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Lou6t4gto
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Report this Post07-25-2013 03:08 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
hasn't any heads yet so it'll spin freely. thanks
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aaronkoch
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Report this Post07-25-2013 04:26 PM Click Here to See the Profile for aaronkochClick Here to Email aaronkochSend a Private Message to aaronkochEdit/Delete MessageReply w/QuoteDirect Link to This Post
If it's a shortblock, be aware that you will need the oil filter adapter, as well as the pressure relief plunger and spring installed, along with an oil filter in order for the pump to work.

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Build thread for my 88 + 3800NA swap

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Lou6t4gto
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Report this Post07-25-2013 06:31 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
They're on, just no heads yet. It MAY sit for awhile, so I'd rather that the oil galleries and lifters be filled.
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Darth Fiero
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Report this Post07-26-2013 01:59 AM Click Here to See the Profile for Darth FieroClick Here to visit Darth Fiero's HomePageClick Here to Email Darth FieroSend a Private Message to Darth FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
Here's my oil system priming procedure for 3800's (this assuming you have the timing cover, oil filter adapter, oil pickup, and oil pan installed)...

1) Fill engine with about 4 qts of oil.

2) Using a cut plastic wire tie and new/empty oil filter, shove the wire tie into one of the smaller holes that surround the center hole so it holds open the anti-drainback flap inside the filter. This is a very important step and if you don't do this, you won't be able to prime the engine.

3) Fill the filter with oil and screw it onto the oil filter adapter (make sure the cut-off plastic wire tie stays in place and doesn't come out or get shoved all the way into the filter).

4) Connect a 1/4" NPT thread to 3/8" or larger nipple adapter fitting to the oil pressure sending unit port on the oil filter adapter housing and then connect a 3/8" ID or larger clear nylon hose that is about 2' long to this nipple. Install a funnel into the end of the hose and hold/secure it upwards from the oil filter adapter housing.

5) Fill the tube with new/clean engine oil (can fill the funnel some).

6) Using a socket wrench, rotate the crankshaft COUNTER-CLOCKWISE slowly. When you do this, you should notice the oil level in the clear nylon tube start to drop. Keep adding oil to the nylon tube and keep rotating the crankshaft until you've added about 1/2 pint of oil to the engine this way.

7) Remove the nylon tube, funnel, and 1/4" NPT nipple. Reinstall the oil pressure sending unit or a mechanical pressure gauge.

8) Using a starter and battery, crank the engine over (with no spark plugs installed in the heads if the heads are installed on the engine) until you get a good oil pressure reading on the gauge or from the sender. The stock sender will measure about 0 ohms of resistance at 0psi and will rise in resistance as oil pressure builds (so you can test pressure using a stock sending unit and ohm meter).

9) Once good cranking oil pressure is established, unscrew the oil filter, remove the plastic wire tie piece from it, and then reinstall. If you cannot get the wire tie piece out of the filter, discard the filter and get a new one - prefill with oil before installing on the engine.

10) Verify proper oil level in the engine prior to starting and then re-verify after it has run for about 30 seconds or so.

NOTE: If you can't get any oil pressure after cranking the engine over for 15 seconds or so (running disabled), STOP and repeat this procedure. If you don't get oil pressure upon starting and running the engine for more than 5 seconds, SHUT IT OFF and repeat this procedure.

-ryan

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OVERKILL IS UNDERRATED

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

[This message has been edited by Darth Fiero (edited 07-26-2013).]

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Lou6t4gto
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Report this Post07-26-2013 01:11 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
very interesting. so by turning the engine COUNTER Clockwise, it draws the oil into the PUMP backwards ? right? so it won't be "air locked" ? I know the engine spins clockwise. Thanks
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Darth Fiero
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Report this Post07-26-2013 09:52 PM Click Here to See the Profile for Darth FieroClick Here to visit Darth Fiero's HomePageClick Here to Email Darth FieroSend a Private Message to Darth FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Lou6t4gto:

very interesting. so by turning the engine COUNTER Clockwise, it draws the oil into the PUMP backwards ? right? so it won't be "air locked" ?


That is correct. But ONLY if oil can flow backwards thru the oil filter.

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DefEddie
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Report this Post07-26-2013 10:00 PM Click Here to See the Profile for DefEddieClick Here to Email DefEddieSend a Private Message to DefEddieEdit/Delete MessageReply w/QuoteDirect Link to This Post
I packed the oil pump with vaseline and just cranked it in clear flood mode then fired it up.
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