oil pressure

[joey7478]

a friend has a 289 engine that has no oil pressure. its been bored 0 40 over.Has new main and rod bearing. Can anyone tell him what the problem might be?

 

[Rowdy Fitzgerald]

No oil pump rod, broken rod or a defective oil pump

 

[85_Ranger4x4]

Or the oil pump driveshaft is not positioned correctly on its retaining clip.

Where it drives the pump, the pump is a through hole so there is nothing aside from the clip to hold it up to engage the distributor correctly. If it doesn't reach it won't turn the pump.

 

[Rowdy Fitzgerald]

85- I totally forgot about the clip! Maybe he has it upside down?

 

[Tominator]

The clip is there to prevent the rod from coming out of the block when the distributor is removed. What sometimes happens is that either the clip was not put back on when the motor was assembled or it slipped and allowed the drive shaft to fall into the oil pan when 'stabbing' the distributor. Also, look to see that the distributor is seated. It can be about 1/8" away from seating and LOOK as if it's all the way down but on some distributors that 1/8" prevents the rod from going up into the distributor shaft.

 

[Rowdy Fitzgerald]

What was the issue? Did you get it figured out?

 

[joey7478]

What was the issue? Did you get it figured out?

no could the cam bearings be bad and cause this he thinks the oil pump and rod is working right

 

[Rowdy Fitzgerald]

Ok tell him to pull the distributor and one of the valve covers. Get a drill, a couple 6" extensions for a 1/4" drive ratchet and a socket that will fit over the oil pump shaft. Tape the socket to the extension, tape the two extensions together and put them in the drill. Put it down the distributor hole onto the oil pump shaft. Now spin the pump (make sure to spin the pump the direction the distributor turns!!!) until you see oil coming out the top of the head. Put the distributor back in and fire it up. If he doesn't have oil pressure then shut it off and buy a new gauge and check it again.

 

[Tominator]

Ok tell him to pull the distributor and one of the valve covers. Get a drill, a couple 6" extensions for a 1/4" drive ratchet and a socket that will fit over the oil pump shaft. Tape the socket to the extension, tape the two extensions together and put them in the drill. Put it down the distributor hole onto the oil pump shaft. Now spin the pump until you see oil coming out the top of the head. Put the distributor back in and fire it up. If he doesn't have oil pressure then shut it off and buy a new gauge and check it again.

Good suggestion!

It is VERY VERY rare for cam bearings to go out on a SBF.

 

[1bad87five0ranger]

also if he has an oil filter relocator make sure his lines aren't opposite of what they should be. this won't allow the oil to flow past the filter and will make a big mess if not careful.