No Oil Pressure--PANIC

[wn]

I have a 360 automatic 79 J-10 (159,000). The oil pressure has been low lately and this morning at start up it was nonexistant. It usually starts at 80 and when it warms up goes down to about 40. It doesn't exist today. I shut it down and figured you guys could give me some help before doing serious damage. The dipstick checks full. The oil sensor unit was replaced last year. I do have a leak in the manifold gasket which could be affecting it.

IDEAS????

[bigblack'74]

if you had a external leak on the motor my bet is that would see some serious oil leaking. at one point my '84 had 3 good sized leaks but yet still held pressure of at least 60-70 at fire up and 20-30 at idle. so check for massive leaks. next bust out with the nee sending unit.. it could have gone bad. if it is still broke you may have to hook the snap-on oil pressure gauge or any other quality device to see if indeed you do have an internal problem. there is a good start

[wn]

<BLOCKQUOTE>quote:</font><HR>Originally posted by bigblack'74:
if you had a external leak on the motor my bet is that would see some serious oil leaking. at one point my '84 had 3 good sized leaks but yet still held pressure of at least 60-70 at fire up and 20-30 at idle. so check for massive leaks. next bust out with the nee sending unit.. it could have gone bad. if it is still broke you may have to hook the snap-on oil pressure gauge or any other quality device to see if indeed you do have an internal problem. there is a good start<HR></BLOCKQUOTE>


Good diagnosis...I am losing about one quart every 200 miles (through manifold gasket). The oil is full...It sounds ok running...I don't have any diagnostic gauges....Would you risk driving it to a garage under these conditions?

[wn]

<BLOCKQUOTE>quote:</font><HR>Originally posted by wn:

Good diagnosis...I am losing about one quart every 200 miles (through manifold gasket). The oil is full...It sounds ok running...I don't have any diagnostic gauges....Would you risk driving it to a garage under these conditions?<HR></BLOCKQUOTE>

I'm taking it to an engine shop to get it checked out....I'll let you know later what the deal is.

Dub

[Wabash-Riverrat]

NO NO NO NO DON,T DRIVE IT!!!!!!!!!!!
NOT UNTILL YOU FIND OUT IF YOU DO HAVE OIL PRESSURE. IF YOU HAVEN,T ALREADY DONE ANY DAMAGE YOU WILL IF YOU DRIVE IT ORE EVEN RUN IT MUCH AT ALL. http://www.ifsja.org/ubb/frown.gif

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I just work so I can buy bait & amo.

[wn]

<BLOCKQUOTE>quote:</font><HR>Originally posted by Wabash-Riverrat:
NO NO NO NO DON,T DRIVE IT!!!!!!!!!!!
NOT UNTILL YOU FIND OUT IF YOU DO HAVE OIL PRESSURE. IF YOU HAVEN,T ALREADY DONE ANY DAMAGE YOU WILL IF YOU DRIVE IT ORE EVEN RUN IT MUCH AT ALL. http://www.ifsja.org/ubb/frown.gif

<HR></BLOCKQUOTE>

Lucked Out!!!!Bad sending unit...Had 40 # pressure at idle with external gauge. Replacing tomorrow.

[RustyJeep]

And a sigh of relief washes over the crowd. http://www.ifsja.org/ubb/smile.gif

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RustyJeep
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Project "P.O.S."
'82 J-10 258 4 Speed
Bone Stock...For Now
w/"Custom" Air Vents
Plaguing the Vehicle
Can anyone say, "Fred Flintstone" here?

Winter Car
----------
'85 AMC Eagle
258 cubic inches of pure...umm...power. Yeah that's it.
Lifted Eagle comes to mind.

Summer Car
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'79 Pontiac Grand Prix
65,000 original miles
301 4bbl with plenty of go.
Custom bent dual exhaust W/out cat.
Overall Sweet Car
Top speed unrecorded as my speedo drops off
and I've still got a long ways to go. :)