Low oil pressure - could be bad filter?

[Yapo_Kakal]

Hey everyone, this is my first message here about my first car

Bought a 1.7 Puma recently, and just after that replaced oil, filter and pressure sensor. After that manipulation I've got a warning oil pressure lamp blinking on idle when engine is fully warmed up.
Well - I checked pressure with manometer and after it showed normal pressure, installed old sensor instead of new one. (sounds strange but i thought old one is leaking but it did actually not). Lamp has stopped blinking.
But after about month i decided to install external sensor like this https://www.amazon.com/WATERWICH-Pressure-Electronic-Universal-Automotive/dp/B07Z1SH7TJ and it is showing now about 0.4 bar on idle. I think first pressure measurement was incorrect and engine was not fully warmed up and because of that I decided that everything is ok.

So, will replace oil filter as soon as i can and, if it wont help, that should i be prepared for? Main Bearings replace, I suggest?

 

[Yapo_Kakal]

Recorded video related to problem. Gauge showing minimum 0.5 bar, but it is even lower

 

[caprixpack]

Just to give you an idea, this is mine after nipping down to the shop and back and being sat for a about 20 minutes before being restarted hence the temperature dropping slightly as cooler oil from the sump circulates. Excuse the naff music on the radio.

 

[Yapo_Kakal]

Just to give you an idea, this is mine after nipping down to the shop and back and being sat for a about 20 minutes before being restarted hence the temperature dropping slightly as cooler oil from the sump circulates. Excuse the naff music on the radio.

Thanks for reply

At the same engine temp and rpms mine pressure absolutely same - first two images. But unfortunately after ride about 20 minutes pressure drops to <1 bar. And sounds. I can hear whooing sound from engine head, so this is why i installed gauge.
Filter change didnt gave a lot - pressure now 0.7-0.5 instead of 0.5-0.3(3rd image) on idle and with engine warmed. And i think its dropping not so soon now, but it can be becase i've added some new oil to compensate oil in old filter

 

[Yapo_Kakal]

Looking right now for brand new oil pump and bearings, and it looks like it not so easy to find this. Maybe parts for other cars will fit?

 

[caprixpack]

Looking right now for brand new oil pump and bearings, and it looks like it not so easy to find this. Maybe parts for other cars will fit?

The oil pump will be rather had to come by, In the 3 years I've owned my puma I've only seen one come up. I believe bearings are still available though.

 

[Yapo_Kakal]

So I think it's time to start looking for parts & tools needed for engine rebuild. Most likely I will do it myself so any advices about parts and engine build are appreciated
Will post here parts I think will be needed
Or maybe I should start new thread about this?

 

[Yapo_Kakal]

Okay, this is that I found after a few hours of googling

Autowelt BE-54051 -rod bearings -0.25 OR Autowelt BE-54050 - STD. I think STD is only option here because pistons stay same and pins with standard size too. But I can misunderstood something
Kolbenschmidt 37122620 -main bearings. Unfortunately there are only STD bearings

Rings: https://www.projectpuma.com/threads/big-end-reshelling.31626/
Honda A18 kit + Nissan QG18 kit
1st CR from Nissan and 2nd from Honda. Oil scrapper made from Nissan outer parts and old Pumas inner part
Still looking for piston pins replacement cuz I think they are worn too

That about oil pump - much old zetecs have very similar pumps with only(I really hope) difference in relief valve setup. I beleave it is possibe to install more tight spring into pump suitable for fiestas or focus 1.6 to get higher pressure 1.7 is required

And there are some parts that 100% need to be replaced:
Ajusa 10119000 - head gasket
Ajusa 81025200 - head bolts
Ajusa 71001900 - crankshaft oil seal 1
Ajusa 15054900 - crankshaft oil seal 2

 

[Pumaswapedmk5]

Before rebuilding the entire engine you should check the oil pressure with a calibrated pressure gauge like the one in the image. I had a pressure gauge like yours and there are many Chinese replica Greddy pressure gauges with poor quality and inaccurate measurements. I think it is always better to start with the cheapest possible cause.






e

 

[Yapo_Kakal]

I think it is always better to start with the cheapest possible cause.






e View attachment 13229

Yep of course. Ordering now mechanical manometer and some cheap 10w40 oil. Will check pressure with old 5w30 and new 10w40 and check if my "Greddy" work right

 

[Yapo_Kakal]

Okay, this is that I found after a few hours of googling

Autowelt BE-54051 -rod bearings -0.25 OR Autowelt BE-54050 - STD. I think STD is only option here because pistons stay same and pins with standard size too. But I can misunderstood something
Kolbenschmidt 37122620 -main bearings. Unfortunately there are only STD bearings

Rings: https://www.projectpuma.com/threads/big-end-reshelling.31626/
Honda A18 kit + Nissan QG18 kit
1st CR from Nissan and 2nd from Honda. Oil scrapper made from Nissan outer parts and old Pumas inner part
Still looking for piston pins replacement cuz I think they are worn too

That about oil pump - much old zetecs have very similar pumps with only(I really hope) difference in relief valve setup. I beleave it is possibe to install more tight spring into pump suitable for fiestas or focus 1.6 to get higher pressure 1.7 is required

And there are some parts that 100% need to be replaced:
Ajusa 10119000 - head gasket
Ajusa 81025200 - head bolts
Ajusa 71001900 - crankshaft oil seal 1
Ajusa 15054900 - crankshaft oil seal 2

Also updating partnumbers after a bit more digging for info.

Autowelt BE-54051 and BE-54050 seems not capable with 1.7. They are suitable for 40mm connecting rod journals - 1.7 has 42mm ones.
Taiho R456H should fit alright, but locking lips need to be processed a bit because whole bearing a bit wider, and lips too.

Same story (not sure) with Kolbenschmidt 37122620, but MS-54000 (or 51001 for -0.25) should fit without any modifications.

Honda A18 kit + Nissan QG18 kit rings will work if you can find NPR kits, but in my country it is impossible.
Better solution I found is to get 1st CR from Goetze 08-101200-00 (nitrited) and 2nd from Goetze 08-435800-00 (phosphated). And left old oil scrapper.

About oil pump. I found out that relatively new ford engines like PNBA (around 125 hp, VCT, - just like 1.7) have oil pumps just like puma 1.7. At least on pics. I think pumas pump was kinda factory tuning part, because it was most powerful zetec at that time. But later ford produced engines like pnba and they have to set up production of more efficient pumps for these new engines. But these are just guesses. And relief valve spring still likely will need to be adjusted.
Still have no idea about piston pins and connecting rod bushings

 

[Yapo_Kakal]

Replaced 5w30 oil with 10w40, now pressure about 1.2-0.9 just after 20min ride. Idk is it still low?
Strange sounds still here but not so loud and frequent

 

[caprixpack]

After a good run mine sits at around 1 bar at idle but that's with 5w30.
This is from the ford workshop manual. No

 

[Yapo_Kakal]

Checked my "greddy" and seems its show real pressure. Also find old video where I first noticed strange sound after good ride, maybe someone can give me a clue what it can be. Usually it is not so loud, idk why on vid it like so. Also with 10w40 oil I almost can not hear it but ofk it isnt a solution.
Also found out that compression rings from single KNECHT/MAHLE640RS101010N0 kit should fit okay

 

[Pumaswapedmk5]

Checked my "greddy" and seems its show real pressure. Also find old video where I first noticed strange sound after good ride, maybe someone can give me a clue what it can be. Usually it is not so loud, idk why on vid it like so. Also with 10w40 oil I almost can not hear it but ofk it isnt a solution.
Also found out that compression rings from single KNECHT/MAHLE640RS101010N0 kit should fit okay

Sorry to read that. Doesnt sound like rod knock but maybe is the start of bearing failure? Did you saw metal shavings on oil? I check my oil pressure and it sits at 1.2 - 1.3 bar at 80°C and 1 bar at 95-100°C with 5w 40. My engine runs good but maybe isnt the healthiest because its an abused track car

 

[Pumaswapedmk5]

Sorry to read that. Doesnt sound like rod knock but maybe is the start of bearing failure? Did you saw metal shavings on oil? I check my oil pressure and it sits at 1.2 - 1.3 bar at 80°C and 1 bar at 95-100°C with 5w 40. My engine runs good but maybe isnt the healthiest because its an abused track car

I was thinking and maybe can be a pulley bearing?

 

[Yapo_Kakal]

I was thinking and maybe can be a pulley bearing?

No, i've asked worksop guys to check engine for strange sounds, when some work with suspension was needed, but they said everything ok. But they are dont heard that sound on video too because it is impossible to heat up oil enough without ride

I really hope it isnt, but most probably it is cams or something else in the head spinning without oil pressure(hope it's lost somewhere in shortblock because there is hard to find used head or cams where i live)
Saw video in youtube with some default car running on almost 0 bars - and heard absolutely same sound for a few seconds. Idk was it fixed after oil pump and bearings were replaced because there was no contunue on authors channel

 

[Yapo_Kakal]

Did you saw metal shavings on oil?

No. But anyway I replaced oil myself only once few weeks ago when changed 5w30 to 10w40..
Mine engine runs okay except that sound and vibration. At first I thougt vibration caused by dead rubber engine mount, but checked it few days ago and it seems ok, at least its dry and not sagged or something
I can feel its vibaring even in headrest but when I touch running engine its kinda ok