Bubbles in oil

[78 280zcar]

Well the radiator is good and the water pump is about a year old so I was thinking it could be the oil pump. If it is how can I test it and are they mechanical or electric. Thanks Shane

[zeiss150]

The oil pump is mechanical its driven by a worm gear on the front of the drive shaft behinde the front cover. in order to test it just take off your vavle cover and start your engine.... .... DON'T TO THAT... unless you want to paint your garage with oil. If you start your car and check your oil pressure gage in the car you should have oil pressure at idle just about 0, if you rev it to 2500 rpms it should go up to about 60psi. If your gage shows nothing then you might have a bad oil pump or, a oil pressure sending unit, or something in your gage. I think you can attach a oil pressure gage to your engine block right in front of the oil filter where the oil pressure sending unit is. If you can't figure it out maybe take it down to the local radiator palce and pay them to check if you have blown a head gasket (my radiator palce does this).

Matt-

[78 280zcar]

, I tried that the first time I ever worked on a car, ( my 78 chevy nova as a matter of fact and it shot everywhere it was cool:ermm:), But anyway I will check that out tomorrow and thanks zeiss180. Thats funny because I didnt even think about that, (checking the oil gauge:stupid:)

[78 280zcar]

Zeiss150, I tried checking to see if the oil gauge moves when I rev the engine to 3000 rpm and the gauge did nothing, any suggestions please let me know

[Fun_in_my_z]

oil pump

[78 280zcar]

:classic: I am a happy man, I did not even want to change the head gasket, but I am still going to change the oil to see if any water did settle on the bottom. Any other suggestions please let me know and thanks for the help

[78 280zcar]

OK, this is what I got so far, I just want to make sure it needs a new oil pump, Ok I added more oil to it because it was low on oil and I took it for a spin around the block and the oil pressure gauge did nothing until I got back and parked it and the needle went up a little bit so I reved the engine to see if it would go up again, it went back down. I tried taking the oil fill cap off and started the car and held my hand over the fill hole and no oil went onto my hand. Even if it is the oil pump, could this be the problem with my overheating. I have a new water pump, I just got a new thermal fan clutch, new thermostat, new coolant temperature switch, drained and refilled the radiator. What else could it be :stupid:, HELP

[240ZX]

78 280Zcar,

Hey, with an avatar like yours you will be lucky to get anyone to read your posts.........they'll all be drooling all over theirselves! ROFL

[sblake01]

I'd check the oil pressure sender and or guage before assuming you've a bad oil pump. If you really had '0' oil pressure you'd be hearing knocking sounds by now.

[Ed]

If you do want to check the oil properly pour it into a clear plastic recepticle like a one gallon water jug. Make sure the plastic is clear and not smoked. Let it sit for a couple of hours after you fill it. If you do have water mixed with the oil it will be visible.

[zeiss150]

You should check the gage first before you go trying to replace the oil pump. I think there is a way to test the gage by grounding the circuit ... but I suck at electrical stuff. It is most likely the oil pressure sending unit. It's the little senser just infront of the oil filter. In order to change the oil pump you have to remove the front sway bar to get to the oil pump (its a pain in the but) Or you can unbolt the engine mounts and jack up the engine a few inches to clear the sway bar. be carefull with that one it could turn bad really quick:eek: if the jack slips!

keep us posted

[78 280zcar]

Alright Thanks for the advice and all your posts, I will keep all updated

:classic: