does any body have the oil pump to a 340 buick. or is there another oil pump interchangeable for my 340. they only have repair kits for them. i need it asap. ne body help.
The oil pump is part of the timing chain cover. It consists of a pocket with 2 spinning gears that pump the oil. One gear is driven by the bottom of the distributor shaft via the cam gear. Internal clearances are critical to oil pump function and efficiency. Wear of the pump pocket can seriously impact pump output. If it is worn enough, you have to replace the timing chain cover. Most times, just getting new gears (rebuild kits), and setting the end clearance of the pump is sufficient to give you good oil pressure. I think the 340 timing cover is the same as the 350. Put "oil pump end clearance" into the search function of this board. You'll have plenty to read.
sounds like your right. this guy/ mech came and messed with the distributor. my timmimg was off. at first it would just turn but wouldnt turn over and when it did it would back fire thru the carb and my oil pressure was ok. at least my guage showed it was. now since he fixed the timming and messed with the distributor im getting no pressure at all. wish i could do it myself. also i have a knocking noise now.
The bottom of the distributor shaft has a tab that fits into the oil pump drive shaft. If the distributor was removed, and put back in, it may not be seated all the way, and the oil pump will not turn. You should not run the engine like that, you could damage it. Knocking means low or no oil pressure. Take a look at the distributor where it goes into the timing cover. Make sure it is all the way in. If the bottom collar is not flush with the cover, the distributor is not engaging the oil pump.
glad u replied. even my mech said that sounds like the reason. hopefully he gets it right tomorrow. let it sit and run for for about 5 mins until we heard it start knocking. so hopefully no damaged. wish you could tell me exactly what to do. but im no mech. i just know parts and i have tools lol. thanks. i will let you know what happends.
I'll tell you what you can try. Disable the ignition by pulling the coil wire out of the coil. Push down on the distributor, while someone cranks the motor. When you feel the distributor drop down the rest of the way, tighten the hold down nut. Look at the bottom of the distributor where it goes into the engine. If you are at all mechanically inclined, you will see the distributor is not fully seated. If you cannot see that, I would leave it to someone else. We all learn by doing. I hope you haven't hurt the engine. Good Luck.
hey mech sd that it has no coil. but he did feel the gears trying to go in place when i cranked the car. sd he think its the sump. or the pick up located inside the oil pan. he said a had a big dent on the pan i might now be gettig any pick up. how does that sound. also he sd if it is the oil pump any 350 oil pump would work. is this true.
Yes, 350 pump is the same. Same timing cover, same pump gears. You sound like you are going to throw money and parts at this not knowing what the problem is. Before you start pulling the oil pan, or the pump, do some testing. Very simple. Have your mechanic pull the distributor out. Take an old screw driver, and brake off the handle. Chuck it into a drill (the bigger the better), and drive the oil pump with the drill. Watch the gauge for oil pressure.
