• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

No oil pressure


Tenper616

New Member
Joined
Aug 27, 2022
Messages
26
Reaction score
8
Points
3
Age
33
Location
Florida
Vehicle Year
1998
Make / Model
Mazda b2500
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
So I just replaced the engine in my 1998 Mazda b2500, put a remanufactured long block in it, got just about everything buttoned up and while filling the coolant up I started the engine to get the coolant flowing, let it run for about 5 seconds or so and I've got no oil pressure, at all, so I I shut her down, started it up again for a few more seconds, about three more, and no oil pressure still, how long should I wait on a remanufactured long block that has already been tested for oil pressure at the factory?
 


SenorNoob

Well-Known Member
TRS Event Participant
Joined
Oct 24, 2012
Messages
2,348
Reaction score
520
Points
113
Location
Middle Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1.5" Front + 4" Rear
Tire Size
245-70-R16
Five seconds sounds about right to me... How do you know you have no oil pressure? Light, gauge, noise?
 

alwaysFlOoReD

Forum Staff Member
TRS Forum Moderator
TRS Banner 2012-2015
TRS 20th Anniversary
Joined
Apr 13, 2009
Messages
13,868
Reaction score
5,026
Points
113
Location
Calgary, Canada
Vehicle Year
'91, '80, '06
Make / Model
Ford, GMC,Dodge
Engine Size
4.0,4.0,5.7
Transmission
Manual
2WD / 4WD
4WD
Use the "clear flooded engine" procedure. Press the gas pedal to the floor. That shuts off the fuel injectors. Then crank away. If the motor tries to start then you have a leaking injector. Or stretched throttle cable.
 

rusty ol ranger

Im a Jeep guy now.
Supporting Member
Joined
Sep 22, 2007
Messages
12,260
Reaction score
7,267
Points
113
Location
Michigan
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
177 CID
Transmission
Manual
2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
You hooked the sender wire up didnt ya?
 

Tenper616

New Member
Joined
Aug 27, 2022
Messages
26
Reaction score
8
Points
3
Age
33
Location
Florida
Vehicle Year
1998
Make / Model
Mazda b2500
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
I've hooked the sender up, yes, I hadn't thought of holding my foot to the floor, and no not on this motor there's not, and yes gauge sound and light
 

rusty ol ranger

Im a Jeep guy now.
Supporting Member
Joined
Sep 22, 2007
Messages
12,260
Reaction score
7,267
Points
113
Location
Michigan
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
177 CID
Transmission
Manual
2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
I've hooked the sender up, yes, I hadn't thought of holding my foot to the floor, and no not on this motor there's not, and yes gauge sound and light
Id unhook the coil wire/coil pack plug and crank it so that way you know it wont start. Even doing the foot on the floor it might start and rev to the moon before you lay off, not good with no oil pressure,
 

Tenper616

New Member
Joined
Aug 27, 2022
Messages
26
Reaction score
8
Points
3
Age
33
Location
Florida
Vehicle Year
1998
Make / Model
Mazda b2500
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
So I'm gonna pull the fuel pump fuse and the coil plugs, AND put my foot to the floor for redundancy reasons, and see if I can get some oil circulation today when I get home, I'll let everyone know what happens
 

55trucker

Active Member
Joined
Aug 1, 2016
Messages
602
Reaction score
183
Points
43
Location
Oshawa, Ontario
Vehicle Year
1998
Make / Model
Ford
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Automatic
2WD / 4WD
2WD
Total Lift
-
Total Drop
mild
It's a fair bet to assume that at the machine shop that built the engine they would use a mechanical pressure gauge & not an electrical gauge to monitor the pressure, try doing the same.
 

RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,290
Reaction score
8,290
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
If valve train was not making noise then its a sender/gauge fault not low oil pressure

And don't rule out a blocked NEW filter, "new" just means NEVER EVER TESTED, not "it works"
 

Tenper616

New Member
Joined
Aug 27, 2022
Messages
26
Reaction score
8
Points
3
Age
33
Location
Florida
Vehicle Year
1998
Make / Model
Mazda b2500
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
It was making noise, as I'm sure I've mentioned before, usually I have the oil pump and prime it myself before installing it, but seeing as I dident install it and was told that the shop tested it all I figured it wouldn't need to be primed
 

rusty ol ranger

Im a Jeep guy now.
Supporting Member
Joined
Sep 22, 2007
Messages
12,260
Reaction score
7,267
Points
113
Location
Michigan
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
177 CID
Transmission
Manual
2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
It was making noise, as I'm sure I've mentioned before, usually I have the oil pump and prime it myself before installing it, but seeing as I dident install it and was told that the shop tested it all I figured it wouldn't need to be primed
Id haul it right back to the shop
 

Tenper616

New Member
Joined
Aug 27, 2022
Messages
26
Reaction score
8
Points
3
Age
33
Location
Florida
Vehicle Year
1998
Make / Model
Mazda b2500
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
I did the work myself as I am a mechanic, just was looking for a way to prime the pump with out removing it, which I ended up doing, after I bench primed the pump it pumped up no problem, truck is running fine, few kinks to work through, has at least one vacuum leak I'll have to find, but other than that it's good
Id haul it right back to the shop
 

rusty ol ranger

Im a Jeep guy now.
Supporting Member
Joined
Sep 22, 2007
Messages
12,260
Reaction score
7,267
Points
113
Location
Michigan
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
177 CID
Transmission
Manual
2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
I did the work myself as I am a mechanic, just was looking for a way to prime the pump with out removing it, which I ended up doing, after I bench primed the pump it pumped up no problem, truck is running fine, few kinks to work through, has at least one vacuum leak I'll have to find, but other than that it's good
Good to hear
 

Sponsored Ad


Sponsored Ad

Members online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top