First start after rebuild, No oil pressure... Someone help me..please! |
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First start after rebuild, No oil pressure... Someone help me..please! |
DavidSweden |
Apr 18 2015, 04:33 AM
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#1
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
Engine 2.0 76
Rebuilt engine and should start it today. Pulled the plugs and filled oil. Cranked engine to get oil pressure but nothing. Pulled pressure switch and tested with compressed air works fine. Loosened oil filter and cranked again oil ran from filter, tightened filter and tried again.... Nothing. Oil type 20W 50 Need some advice on what to check to find source or problem.... It's just a Pita |
toolguy |
Apr 18 2015, 12:22 PM
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#2
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Senior Member Group: Members Posts: 1,270 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California |
You could pull a valve cover and see if oil has gotten up there. . If so, then you know the cam is lubricated and the crank should be also. .
Will make a mess but you can pull the oil pressure sender, crank as see if oil come out. . How are you measuring oil pressure? to an idiot light or a gauge? Might be that you have pressure but the indicator isn't working properly. |
DavidSweden |
Apr 18 2015, 12:29 PM
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#3
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
You could pull a valve cover and see if oil has gotten up there. . If so, then you know the cam is lubricated and the crank should be also. . Will make a mess but you can pull the oil pressure sender, crank as see if oil come out. . How are you measuring oil pressure? to an idiot light or a gauge? Might be that you have pressure but the indicator isn't working properly. Pressure idiot light sender working ok. Removed idiot light sender and cranked engine some oil is coming up but its not exactly gushing. Any ideas as what to do next? |
Dave_Darling |
Apr 18 2015, 12:44 PM
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#4
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914 Idiot Group: Members Posts: 15,000 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
Did you pre-fill the filter with oil? If so, you may have hurt your cause. I have had success in that situation by using a turkey baster to squirt oil up into the pickup tube (yes, it's a mess!) to get enough in there to prime it.
--DD |
McMark |
Apr 18 2015, 12:57 PM
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#5
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
It seems to take forever for a fresh T4 to get oil pressure.
Was the oil cooler new? Are you sure the big oil pressure piston is in place? It just occurred to me that 'pinning' the big oil pressure relief piston shut might improve oil filling time. High oil pressure will bleed off back to the sump... (IMG:style_emoticons/default/idea.gif) |
DavidSweden |
Apr 18 2015, 01:00 PM
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#6
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
Did you pre-fill the filter with oil? If so, you may have hurt your cause. I have had success in that situation by using a turkey baster to squirt oil up into the pickup tube (yes, it's a mess!) to get enough in there to prime it. --DD Dave, I did not pre-fill the filter. Which pick up tube are refering too (I am a newbie) do you mean one in sump? I dont care about making a mess I just got to get this mother fired up! Thanks |
DavidSweden |
Apr 18 2015, 01:07 PM
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#7
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
It seems to take forever for a fresh T4 to get oil pressure. Was the oil cooler new? Are you sure the big oil pressure piston is in place? It just occurred to me that 'pinning' the big oil pressure relief piston shut might improve oil filling time. High oil pressure will bleed off back to the sump... (IMG:style_emoticons/default/idea.gif) Yes the oil cooler is new. The piston moved freely when I installed it and I even installed the spring, joking aside I appreciate the help What you mean is that the oil cold and at high pressure so is being diverted by the pressure piston and is therefore not building pressure under the idiot sender? |
McMark |
Apr 18 2015, 02:08 PM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
It's a possibility. If you pull the big piston back out and use a length of rod in place of the spring, you can keep the oil from bypassing. The motor shouldn't run the way though. (IMG:style_emoticons/default/wink.gif)
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DavidSweden |
Apr 18 2015, 03:12 PM
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#9
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
It's a possibility. If you pull the big piston back out and use a length of rod in place of the spring, you can keep the oil from bypassing. The motor shouldn't run the way though. (IMG:style_emoticons/default/wink.gif) Sorry but I don't think this is right, if the pressure is high enough to open the bypass valve then the sender should show oil pressure. Check out the diagram from the WSM Does anyone have any way to test if the pump is pumping oil att pressure? (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1429391927.1.jpg) |
McMark |
Apr 18 2015, 03:19 PM
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#10
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
yeah, good point. (IMG:style_emoticons/default/sad.gif)
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Highland |
Apr 18 2015, 04:56 PM
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#11
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Senior Member Group: Members Posts: 516 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California |
Just my 2 cents, but I couldn't build oil pressure with just the starter turning the motor. When I removed the oil pressure gage oil was in the boss so I figured oil was in the system since I did no priming.
Started the motor and oil pressure came to specified range immediately. I've started the motor twice and ran the cam break in procedure, but have yet to install, so the verdict is still out on my engine:) |
DavidSweden |
Apr 19 2015, 01:34 AM
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#12
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
Just my 2 cents, but I couldn't build oil pressure with just the starter turning the motor. When I removed the oil pressure gage oil was in the boss so I figured oil was in the system since I did no priming. Started the motor and oil pressure came to specified range immediately. I've started the motor twice and ran the cam break in procedure, but have yet to install, so the verdict is still out on my engine:) Thanks Highlander, If there are no more ideas from members as what to do then I will probably go that route. |
rick 918-S |
Apr 19 2015, 03:03 PM
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#13
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Hey nice rack! -Celette Group: Members Posts: 20,519 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region |
I would fire it for a second. Then Pull the coil wire and see if the light goes out when cranking it with the starter. Is your battery fully charged? Engine cranking normally?
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DavidSweden |
Apr 19 2015, 04:12 PM
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#14
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
I would fire it for a second. Then Pull the coil wire and see if the light goes out when cranking it with the starter. Is your battery fully charged? Engine cranking normally? The light goes out when the wire is pulled. I have put the battery on charge. There is oil in the gallery so I guess the pump is working. I will see if I can get pressure with a fresh battery. I may just throw caution to the wind and fire it up, I don't really see what my other options are? As you will understand I am a bit anxious as I have been rebuilding the engine since september and have put a lot of work and $ into it. The thought of it seizing is just too much. |
Jake Raby |
Apr 19 2015, 05:15 PM
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#15
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Engine Surgeon Group: Members Posts: 9,396 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Fire up and shut down 5 times in succession. Let it run less than 1 second and shut it off.
I always pack the oil pump full of vaseline when assembling and the engine will usually get OP in 5 seconds. |
Al Meredith |
Apr 19 2015, 05:56 PM
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#16
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Senior Member Group: Members Posts: 963 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
I build 2 engines a year and start them on an engine stand outside the car. I always install a direct reading oil pressure guage. I crank them on the starter with the plugs out. I 1/2 fill the oil filter and sometime I can't get any pressure so I remove the filter and let some oil run out of the filter housing under cranking . Then reinstall the filter , crank the engine and I usually get 40 + PSI with the plugs out. It takes a while to fill the valve assembly. Best advise is to listen to Jake.
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Geezer914 |
Apr 20 2015, 08:38 AM
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#17
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Geezer914 Group: Members Posts: 1,483 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States |
Why is it recommended NOT to fill the oil filter when trying to build up oil pressure??? (IMG:style_emoticons/default/confused24.gif)
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stugray |
Apr 20 2015, 09:54 AM
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#18
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Why is it recommended NOT to fill the oil filter when trying to build up oil pressure??? (IMG:style_emoticons/default/confused24.gif) To prime this system, the pump needs to pull oil up from the sump. While it is doing this (for the very first time) the pump only has air to use as the "pumping medium". This is why it takes so long to prime. IF you are asking the pump to prime itself WHILE trying to push oil OUT of the filter, it will take longer. I think the best idea is to leave the filter off, and prime till oil is coming out of the filter bracket. Then you can put the filter on (ful OR empty) and continue to prime until you get pressure. |
DavidSweden |
Apr 20 2015, 10:51 AM
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#19
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
Thanks to everyone for helping me out I appreciate it. I will let you know how it goes.
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