1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Any way to test oil pressure before installing the motor

Thread Tools
 
Search this Thread
 
Old 06-08-10, 02:52 PM
  #1  
Blood, Sweat and Rotors

Thread Starter
iTrader: (1)
 
DriveFast7's Avatar
 
Join Date: Aug 2001
Location: California
Posts: 3,742
Received 1 Like on 1 Post
Any way to test oil pressure before installing the motor

Title says it all. I'll imagine a yes but it's a lot of work and the oil control rings need break in time to seat properly so you won't get an accurate reading anyways. But thought I'd ask anyways.

Fresh rebuild has held 15psi of air in the coolant system for the last 18 hours. Yay. Just wanted to test the oil system for pressure before doing the front stack.
Old 06-08-10, 03:04 PM
  #2  
1st-Class Engine Janitor

iTrader: (15)
 
DivinDriver's Avatar
 
Join Date: Jun 2008
Location: Chino Hills, CA
Posts: 8,376
Received 26 Likes on 24 Posts
None that I know of.

Oil system isn't a sealed loop like the cooling system is; it gravity-bleeds oil past most bearings back into the pan, from several places.
Old 06-08-10, 03:15 PM
  #3  
GET OFF MY LAWN

iTrader: (1)
 
jgrewe's Avatar
 
Join Date: Feb 2005
Location: Fla.
Posts: 2,837
Likes: 0
Received 2 Likes on 2 Posts
It would require the front cover to be removed and the pump drive chain taken off so you can spin the pump. In other words, probably not worth it.

Just put it in, crank it with no spark until the pressure comes up. You should get about 15-20 psi on the starter.
Old 06-09-10, 06:07 PM
  #4  
Blood, Sweat and Rotors

Thread Starter
iTrader: (1)
 
DriveFast7's Avatar
 
Join Date: Aug 2001
Location: California
Posts: 3,742
Received 1 Like on 1 Post
What are the chances of the oil control ring springs slipping out of the dimple on the rotor, or off the control rings after they're installed on the workbench? Wish there was a way to check that, I was careful but would like to be sure.

Any chance if the springs slipped out of either place that they'll pop back where they belong?
Old 06-09-10, 08:28 PM
  #5  
RX for fun

iTrader: (13)
 
Siraniko's Avatar
 
Join Date: Aug 2001
Location: Socal
Posts: 15,926
Likes: 0
Received 22 Likes on 19 Posts
the more you baby it, the likely it will break. so just install it and drive it like yo stole it.
Old 06-10-10, 10:17 AM
  #6  
1st-Class Engine Janitor

iTrader: (15)
 
DivinDriver's Avatar
 
Join Date: Jun 2008
Location: Chino Hills, CA
Posts: 8,376
Received 26 Likes on 24 Posts
Originally Posted by DriveFast7
What are the chances of the oil control ring springs slipping out of the dimple on the rotor, or off the control rings after they're installed on the workbench? Wish there was a way to check that, I was careful but would like to be sure.
Pretty low odds if installed right, I'd say.

As tight as the o-rings hold the hard seals, it'd take a LOT of force to get them to rotate in their bores after they're pressed in.

Once you press them down into the grooves as instructed (using an old ring to spread the force around), they don't rotate at all, and I've never had one pop back out during assembly once they were pushed in.
Old 06-11-10, 12:32 AM
  #7  
rotorhead

iTrader: (3)
 
arghx's Avatar
 
Join Date: Aug 2004
Location: cold
Posts: 16,182
Received 429 Likes on 263 Posts
hook the engine up completely and remove the oil filter. crank the engine over and see if oil comes out from there.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
andyvideopro
General Rotary Tech Support
3
08-20-15 10:55 AM
stickmantijuana
20B Forum
8
08-18-15 02:46 PM



Quick Reply: Any way to test oil pressure before installing the motor



All times are GMT -5. The time now is 10:14 AM.