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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sun, Apr-03-2016, 04:01:11 AM   #1
Livewire1201
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Default 95 M3 Low Oil Pressure

My engine was rebuilt several years ago by previous owner and he had Schrick cams installed at that time. I decided to turbo her so I bought a complete engine for the head only with stock cams. Sent head to machine shop for complete rebuild, installed, added turbo, and added oil pressure gauge when I did my gauges. Took me about 6 months to do the build.
When I started first time, I showed no oil pressure on gauge. oil light flickered, lifters were noisy, so shut down and investigated. Found nothing wrong, fired up again and same thing. Took everything back apart all the way including the head, found nothing wrong except no oil was being pumped up to cams and lifters. After scratching my head for weeks and talking to everyone I could, I decided only big change was the head, so I installed old, non-rebuilt head. Same problem including no oil up into head, so no lubrication and lifters wont pump up.

Has been sitting for 6 months and time to get back going

1) I get some oil pressure so dont think its the pump nut (no proof but hope was done when rebuild done )
2) I know oil pressure check valve under head is installed ( but could it be stuck )

Any thoughts or ideas would be greatly appreciated before I tear back down again and go back to stock including engine rebuild
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Old Sun, Apr-03-2016, 11:41:55 PM   #2
englishtom1596q
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Default Re: 95 M3 Low Oil Pressure

oil pump nut, oil pump, oil pickup tube could all be problems. drop the pan and find out, its not a hard job.
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Old Mon, Apr-04-2016, 04:46:54 AM   #3
vmbray
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Default Re: 95 M3 Low Oil Pressure

Is the check valve installed in the head?

Just thinking things you during the build (or shop) did since it ran fine before, right?

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Old Wed, Apr-13-2016, 03:35:41 PM   #4
Overboostin
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Default Re: 95 M3 Low Oil Pressure

sounds like the oil pump.
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Discussing Taking a unicorn from ratty to rockstar in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)