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202 No Oil Pressure

Started by _Last-Rites_ , Nov 28 2016 06:03 PM

202 oil pressure nos engine

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16 replies to this topic

#1 _Last-Rites_

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Posted 28 November 2016 - 06:03 PM

Howdy all,

I am in need of some help before I do the unthinkable.

I have built an engine with the assistance of a mechanic and we are having major issues with getting oil pressure. The motor has been built for NOS so bearings have a bit more than normal tolerances. I am also running an ASR drag racing sump and modified High Flow JP oil pump. The oil I am using is a Penrite 15w50 Racing 15 Full Zinc oil which was recommended to my by the engine machinist.

After 2 nights of trying to get oil up the pickup we are still unsuccessful. We have added another 1L to the max level to see if this will help as well as being done during our tests so far. We packed the pickup with vas as well as the pump. We have since checked the pump which is creating suction and pressure to push it around. We removed the pressure gauge attached a fitting to it along with a tube full of oil and used air pressure to try and help get things moving but no luck.

We have been told to hook up a secondary oil pump or even just hook it all up and start the bastard but I really don't want to Chernobyl this motor.

Does anyone have any other ways or problems they have found with the lack of suction pressure from the pump etc and a way to rectify it. Photos would be a great help also

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#2 _Agent 34_

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Posted 28 November 2016 - 07:14 PM

take the vaso out of the pick up. and only prime the pump

suction will not work if there is an air gap. so there is no hydraulic vacuum ( so to speak) and the vasoline is very heavy to move which is what i think is your problem,

three cents.

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#3 greens nice

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Posted 28 November 2016 - 07:20 PM

Did you install the gallery bung behind the cam gear?

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#4 _Bomber Watson_

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Posted 28 November 2016 - 08:26 PM

Gallery bung behind the cam gear, oil squirter on the cam gear, lifter band dropping out of the bottom of the lifter bores, #@$^%& oil pressure guage.

Four most common culprits.

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#5 S pack

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Posted 28 November 2016 - 08:28 PM

.

Edited by S pack, 28 November 2016 - 08:28 PM.

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#6 EunUCh

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Posted 28 November 2016 - 08:57 PM

Vas. to fill the gap in the pump , WTF , apart from the obvious unplugged or other wise overlooked things don't ever use vas. in oil pumps , a simple rule of thumb is to make sure the pump has a bit of oil in it or at worst some sort of oil "additive" that generally is a little more thicker than the engine oil being run to get the oil up , after that the stupid thing has to put up with whatever oil is being run in the sump once the crap in the pump has been pumped around a bit , either that or ask the new age mechanic for expert ideas ?

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#7 _Last-Rites_

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Posted 28 November 2016 - 09:04 PM

take the vaso out of the pick up. and only prime the pump

suction will not work if there is an air gap. so there is no hydraulic vacuum ( so to speak) and the vasoline is very heavy to move which is what i think is your problem,

three cents.

I have always packed both but yes we are considering this option as a last resort as we need to remove the motor completely to do it.

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#8 LJ RB30

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Posted 28 November 2016 - 09:08 PM

or plug at the back of oil gallery at the back of the block!

Definitely dont put any vas in the pick up only the pump if needed!

I use an external pressure tank (with regulated compressed air on top of the oil) with 4-5lt of oil connected to the oil sender hole to totally pressurize the whole system before attempting to start any of my fresh motors.

If that doesnt work more investigation definitely needed

Edited by LJ RB30, 28 November 2016 - 09:08 PM.

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#9 _Last-Rites_

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Posted 28 November 2016 - 09:11 PM

Did you install the gallery bung behind the cam gear?

Yep.

Gallery bung behind the cam gear, oil squirter on the cam gear, lifter band dropping out of the bottom of the lifter bores, #@$^%& oil pressure guage.

Four most common culprits.

Cam squirter is good and was given a good clean before fitment. Lifter band? Gauge and sensor both tested and good.

Vas. to fill the gap in the pump , WTF , apart from the obvious unplugged or other wise overlooked things don't ever use vas. in oil pumps , a simple rule of thumb is to make sure the pump has a bit of oil in it or at worst some sort of oil "additive" that generally is a little more thicker than the engine oil being run to get the oil up , after that the stupid thing has to put up with whatever oil is being run in the sump once the crap in the pump has been pumped around a bit , either that or ask the new age mechanic for expert ideas ?

Machinist and high performance engine builder both recommended filling the pump with vas. Oil in the filter has been pumped out and there is signs of suction from the pump to the filter as there is vas in the filter. Starting to really consider a pickup issue.

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#10 _Last-Rites_

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Posted 28 November 2016 - 09:14 PM

or plug at the back of oil gallery at the back of the block!

Definitely dont put any vas in the pick up only the pump if needed!

I use an external pressure tank (with regulated compressed air on top of the oil) with 4-5lt of oil connected to the oil sender hole to totally pressurize the whole system before attempting to start any of my fresh motors.

If that doesnt work more investigation definitely needed

Do u have a photo of the tank setup?

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#11 LJ RB30

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Posted 28 November 2016 - 09:52 PM

Do u have a photo of the tank setup?

not handy sorry.

Its an old 15lt ish pressure tank that i stand vertically that has a fitting top & bottom. Remove the top fitting to pour the oil in & refit then connect regulated air. bottom fitting has a hose thats connected to the sender hole. Usually push 50-60psi into it & you will hear the oil work its was up through the lifters etc

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#12 warrenm

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Posted 28 November 2016 - 11:23 PM

not handy sorry.

Its an old 15lt ish pressure tank that i stand vertically that has a fitting top & bottom. Remove the top fitting to pour the oil in & refit then connect regulated air. bottom fitting has a hose thats connected to the sender hole. Usually push 50-60psi into it & you will hear the oil work its was up through the lifters etc

Old fire extinguisher works well, remove the original hose, fit a hose with suitable ends, pump it up & use a "t" piece where the oil pressure sender goes couple litres of oil the rest in the sump.

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#13 LC-GTR-1969

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Posted 29 November 2016 - 06:36 AM

I have heard and read of others using vasolene but never done it myself to be honest.

In honesty, I have always just primed the oil pump and filter, as well as always used a liberal amount of engine assembly lube (to stick to all the bearing and mating surfaces) to help protect the first 10 seconds of running, just in case of oil pressure issues. Strangely enough I havent built many 202s, but this has worked a treat with the various other engine types ive built (as well as the few 202s I built back in the day).

The can with compressed air sounds like a good idea- even though the benefit may be minimal in some cases, it could also be a saviour in other cases where the pump is struggling to pull througjh an air pocket, hence its probably a good insurance policy for all new engines.

not handy sorry.

Its an old 15lt ish pressure tank that i stand vertically that has a fitting top & bottom. Remove the top fitting to pour the oil in & refit then connect regulated air. bottom fitting has a hose thats connected to the sender hole. Usually push 50-60psi into it & you will hear the oil work its was up through the lifters etc

great work- a diagram would be good I reckon...

Edited by LC-GTR-1969, 29 November 2016 - 06:37 AM.

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#14 TerrA LX

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Posted 29 November 2016 - 06:56 AM

Are you taking oil pressure readings at the pump?
Are you using an electric or mechanical gauge, ex, are you actually sure you have no pressure or just no reading?
As bomber and others have eluded to,
A mechanical gauge can be hard to bleed to get an actual reading... so long as the engine has been assembled correctly.
Usually pick up leak if you can not establish oil pressure

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#15 _Bomber Watson_

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Posted 29 November 2016 - 07:19 AM

Cam squirter is good and was given a good clean before fitment. Lifter band? Gauge and sensor both tested and good.

.

With certain lifters the oil grove around the middle can fall out of the bottom of the lifter bore when its on the base circle of the lobe.

Its absolutely critical with any build to check this, and because the main galley feeds the lofters it will drop your oil pressure quick smart.

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#16 _Last-Rites_

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Posted 29 November 2016 - 09:43 PM

All sorted.

For future reference if u are having initial oil pressure issues with a new motor build.

Remove the oil filter. Use a brake bleeder vacuum and stick the hose down oil pick up line which is at the top of the pump (from memory). Suck oil up until it's coming into the bottle. Fill the oil filter with oil and crank motor.

That's how we got mine working