BP4W Oil Pump Loosing Prime.....Sometimes - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 07-01-2014, 07:15 PM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2014
Location: Bartlett, Tn
Posts: 107
Total Cats: 2
Default BP4W Oil Pump Loosing Prime.....Sometimes

I never had this problem before the Turbo Swap that I am aware of but it could just be coincidental. I read a few threads and did a few minor things all ready trying to resolve the issue. From the beginning : I greased the drill bit and drilled my oil return hole in the pan, greased the tap as well, then tapped it. Threaded in fitting then flushed the oil pan with roughly 2 gallons of Diesel Fuel and let drain. Then changed filter and added fresh oil. Parts house was closed and all I had was a cheap STP filter. Drove it a few weeks and all seemed good. Leaving work one afternoon and started my car and I had no oil pressure. Valve train was noisy, Oil Pressure gauge showing no pressure. I turned engine off and looked for leaks and found none. Checked oil and all looked good. Restarted and revved engine a few times and all of a sudden I had oil pressure. Pulled car into shop and hooked my Oil Pressure gauge to it and took a quick reading. Had 13 PSI at idle and above 2500 it stayed around 40 psi. Pressures did not fluctuate much as the engine got hotter. I blamed it on the cheap filter. Went and bought a WIX Filter and drove it a few days and It did it again one morning when I was leaving for work. It doesnt do it all the time. Any other ideas from anyone before I start pulling my 218k engine out? ( edit : I did not drill through my pickup tube either)
jmuse8482 is offline   Reply With Quote
Old 07-01-2014, 07:34 PM   #2
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

Sticking bypass valve is my first guess.
rleete is offline   Reply With Quote
Old 07-01-2014, 07:53 PM   #3
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 2,895
Total Cats: 109
Default

Make sure you do not have a melted dipstick.

A member here installed a turbo, melted his dipstick, and fragments of melted plastic ended up in his oil pump causing the same problem you are having. It did not end well for him.

Whether it is a melted stick or some other debris, it is likely you have trash in the system.
miata2fast is offline   Reply With Quote
Old 07-01-2014, 08:20 PM   #4
Junior Member
Thread Starter
 
Join Date: Mar 2014
Location: Bartlett, Tn
Posts: 107
Total Cats: 2
Default

It was what I expected but not what I wanted to hear hahaha.... is what it is. I know its not a melted dip stick.. read that thread all ready
jmuse8482 is offline   Reply With Quote
Old 07-02-2014, 01:21 AM   #5
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Bypass valve is sticking. Pull the motor, drop the pan, change the pump, reassemble.
Savington is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:36 AM.