• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

No Oil in Pipe to Gauge

Share this page

M

marc95590

Freshman Member
Country flag
Offline
Good morning to all of you,
thumbs up


I'm still rebuilding my 1964 BJ8, and I have to say the problems are piling up. While some have been fixed, there's a new one that's intrigued me, and I'm asking for help because I'm stuck at this point.

First, I have no idea if there was any pressure because the original gauge wasn't working.

So, I bought a new gauge, and it works because the temperature is showing.

I removed the hose to check if it wasn't clogged: nothing wrong with the engine starting

I removed the hose on the engine block: nothing wrong with en engine starting

While reviewing the forum's posts, I read that the adaptive cartridge filter might be installed incorrectly. I removed the filter and noticed that it was installed correctly. I inspected the filter and noticed that it wasn't with oil, which didn't seem right to me.

Before putting the original filter back on, I turned the engine and noticed that oil was coming out of the hole. (I had to clean…) So the pump seems to be working, or maybe it's the crankshaft's movement that's causing the oil to come out.

I put the old filter holder back on and check if the oil is coming out of the pipe: I ran the engine and nothing.

Then, okay, I'm out of luck
angry smiley


What could be wrong, what can be the problem? Thanks for your advice.

Have a nice day
Marc
 
A few thoughts,

"So, I bought a new gauge, and it works because the temperature is showing."

If it's a brand new gauge, it is probably working, but please note that the combination gauge is actually two sperate gauges in one housing so just because the temp is working doesn't guarantee the oil pressure is.

"I removed the hose to check if it wasn't clogged: nothing wrong with the engine starting

I removed the hose on the engine block: nothing wrong with en engine starting"

You should also check the fitting in the block that the hose for the gauge attaches to. It has a very small hole for oil to pass through on it's way to the gauge. It is designed to dampen pressure pulses so the gauge is smooth and steady. It doesn't take much to plug this small hole.

If this is a newly rebuilt motor, it can take a long time to fill all the oil passages and create oil pressure. You should pull all the plugs and crank the engine with the starter until you have oil coming out of the rocker feed pipe and registering on the gauge before trying to start the engine. You may have to crank a while and stop to let the starter cool a bit and then crank again - repeat until you have pressure before starting the engine.
 
Thanks Redi57

It is true that as well as the gauge is brand new, it does not mean it work. Your are right, however, there is no oil in the tube that is fixed to the gauge. The oil does not reach the tube pipe.

I have also removed the fitting in the block to verify is the tube was obstructed. NO everything is in good order. The oil can go thought.

I noticed within my problems’ description, that the adaptive filter is full of oil, but the oil doesn’t get outside (from the filter). The oil seems to be sucked in the filter. The same with the original oil filter. It means that the oil is not distributing the top of the engine. I do not know if this a sum oil pump failure symptom...

It is not a rebuilt engine. I bought the car some time ago, and the engine started but no gauge, so I could not see if oil was reaching al the engine's part. (Unfortunately)
I cannot run the engine for long without having a major problem due to lack of oil distribution.

Hard to find the issue,….

Thanks for your interest.
Marc
 
So, you checked that the new filter adaptor is mounted correctly? Did you pre-fill the new filter? It can take a long time to fill the filter, typically nearly a quart. The filter has to be completely filled before any oil goes to the rest of the engine. Take the rocker cover off and disconnect the oil feed pipe - crank with the starter until oil comes out the feed pipe. Do not start the engine until you have oil coming out the rocker feed pipe.
 
Hi again RED57

Well, I am surprised of what is happening!

Yesterday I ran the engine until the motor was in temperature 95C°. It took a while and no oil pressure.

late this afternoon I decided to make a test compression (cold engine it runs between 9 and 10) so not too bad. To make the test, I had to start the engine only by the key contact.

As I was making a round trip between the key contact and the spark plugs, I noticed some oil on the top of the line tube. Then I reconnected the gauge and ran the engine with the key contact. The gauge was moving! I started the engine and with cold oil, the gauge showed 60…. I guess this is correct but this is not explaining what the problem was…This will be a mechanical mystery…

So the post can be closed

Thanks to all of you
Marc
 
Sorry but not a mystery - if you had not pre-filled the oil filter. It simply took a long time to fill the filter before oil was pushed beyond the filter to the rest of the system and the gauge.

Glad you are now showing good oil pressure
 
I have found that when the oil is drained from the sump for a period of time--perhaps a couple days--the oil pump can loses its prime and even after the sump is refilled it takes an uncomfortably long time for the gauge to register oil pressure. By undoing the oil flex line at its top end and squirting oil down it with an old fashioned oil can the oil pump gets back-fed and reprimed, and the needle goes up to pressure immediately on starting.
 
Back
Top