Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Oil builds pressure at filter and then spews out

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Old Dec 24, 2017 | 08:20 AM
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Default Oil builds pressure at filter and then spews out

I've torn apart my block and cleaned along with new bearings and everything internal because the old one was bad from not getting oil. Something is causing backpressure to build up and spew out of the oil filter.
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Old Dec 24, 2017 | 02:58 PM
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Default Re: Oil builds pressure at filter and then spews out

Did you replace the oil pump when you cleaned the internals?
Have you inspected or replaced the PCV valve recently?
Any block damage near the oil filter that could cause improper sealing?
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Old Dec 24, 2017 | 03:08 PM
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Default Re: Oil builds pressure at filter and then spews out

The black box is good
OIL filter union bolt is good.
once it pumps oil into the oil filter it won't go through the oil passage somewhere and it blows the oil filter open or even through the gasket.
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Old Dec 24, 2017 | 03:16 PM
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Default Re: Oil builds pressure at filter and then spews out

Originally Posted by Maiyen
The black box is good
OIL filter union bolt is good.
once it pumps oil into the oil filter it won't go through the oil passage somewhere and it blows the oil filter open or even through the gasket.
Thanks for avoiding all of my questions.

Any leaks in the oil pressure switch? Oil light staying on or blinking after starting engine?

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Old Dec 24, 2017 | 03:37 PM
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Default Re: Oil builds pressure at filter and then spews out

Where the oil filter goes is okay. Where the pcv goes is good. I checked with my hand on the oil filter and that is definitely where it spews.
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Old Dec 24, 2017 | 03:49 PM
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Default Re: Oil builds pressure at filter and then spews out

Originally Posted by Maiyen
I checked with my hand on the oil filter and that is definitely where it spews.
Okay Are you sure it's a backpressure issue and not a sealing issue?
Is the old filter the correct one for your car's model and year?
Did you tighten it enough?
Is there an issue where the filter/ rubber seal mates with block?
Are there any threads stripped on the filter or the the threaded stud the filter screws onto?

My guess is that back-pressure is not the issue. More likely, there's an issue that's causing the oil filter to not seal properly or oil sending unit is leaking.
Post a video of the oil spewing while engine is running so we can all get a better look at what you are seeing.

Last edited by Megalodong; Dec 24, 2017 at 04:44 PM.
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Old Dec 24, 2017 | 04:14 PM
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Default Re: Oil builds pressure at filter and then spews out

I've tried three different type of oil filters hand tightened down very tightly. I've coated the oil filters with a light prime of oil and tightened it to where it was very tight. The threads on the union filter are good. One out of the three oil filters had it's housing blown open. The other two had it's gaskets blown through.
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Old Dec 24, 2017 | 04:30 PM
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Default Re: Oil builds pressure at filter and then spews out

Originally Posted by Maiyen
I've tried three different type of oil filters hand tightened down very tightly. I've coated the oil filters with a light prime of oil and tightened it to where it was very tight. The threads on the union filter are good. One out of the three oil filters had it's housing blown open. The other two had it's gaskets blown through.
It seems like if that much pressure was buildng the dash's oil light would blink or stay on constantly...but, maybe it only senses low oil pressure?
Remove the oil sending unit and hook up an external oil pressure gauge and test pressure
Not a Honda but same test procedure. Find oil pressure specs in the service manual:
.
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Old Dec 24, 2017 | 05:01 PM
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Default Re: Oil builds pressure at filter and then spews out

I just brought this issue up to someone else (mechanic) and this is his reply:

"Assuming he started the engine when it did this, this screams the thing is over-pressured---typically because the relief valve in the pump is stuck closed--- or something similar."
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Old Dec 24, 2017 | 05:10 PM
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Default Re: Oil builds pressure at filter and then spews out

I have an oil guage installed already. It stays at 100(it's max) when it's cranked. I only baby the ignition until it turns on and then immediately turn it off. That's what I thought at first when it first happened. I thought it was the relief valve. Thank you for your input. I'll replace my oil pump and see what happens, and update the thread for anyone else in the future.
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Old Dec 24, 2017 | 07:56 PM
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Default Re: Oil builds pressure at filter and then spews out

Originally Posted by Maiyen
I have an oil guage installed already. It stays at 100(it's max) when it's cranked. I only baby the ignition until it turns on and then immediately turn it off. That's what I thought at first when it first happened. I thought it was the relief valve. Thank you for your input. I'll replace my oil pump and see what happens, and update the thread for anyone else in the future.
Weren't you tempted to replace the oil pump before (or during) you started working on the engine internals?
Seems like with any oil pressure issues (other than a faulty sending unit) the oil pump itself, or in this case the relief valve, along with the filter should be the prime suspect(s).
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Old Dec 25, 2017 | 05:50 AM
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Default Re: Oil builds pressure at filter and then spews out

Did you blow air through the oil passages to make sure they are clear while the block was apart?

Yes the pump has a relief valve that should prevent it from making pressure higher than about 90 psi so the oil filter doesn't blow. But if the oil passages are blocked, you will still have bearing failure due to lack of oil.
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Old Dec 25, 2017 | 12:55 PM
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Default Re: Oil builds pressure at filter and then spews out

I used a pressure washer and then an air hose in the passages. My bearing failure and bent rod could have been due to no oil since it spewed out because of excess pressure and it created a hole for the rest od the oil to come out of. I did inspect the bearings and it had filled the oil ports with bearig materialdue to lack of lubrication. But, like i said im pretty sure that happened because it spewed the oil reserve from the oil pan. When i turned the engine over the psi stayed at 100 which is weird because it usually is 80 and then idles at 10 or so unless i rev it and buulds to 80 psi.
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Old Dec 26, 2017 | 04:20 AM
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Default Re: Oil builds pressure at filter and then spews out

Originally Posted by Maiyen
I used a pressure washer and then an air hose in the passages. My bearing failure and bent rod could have been due to no oil since it spewed out because of excess pressure and it created a hole for the rest od the oil to come out of. I did inspect the bearings and it had filled the oil ports with bearig materialdue to lack of lubrication. But, like i said im pretty sure that happened because it spewed the oil reserve from the oil pan. When i turned the engine over the psi stayed at 100 which is weird because it usually is 80 and then idles at 10 or so unless i rev it and buulds to 80 psi.
OP.. just a future reference and not inteded to be a critisism: It would have been helpful if you started the first post with this detailed information + that you have an oil gauge/ external gauge and combined that with what you wrote in the first post. Doing so would have taken some guess work out of the thread.
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