Re: Low oil pressure in ZL-1
 

****Not saying it is,*****but I had a similar problem years ago on a rebuild--low oil pressure --oil pressure would increase some if I brought up the rpms..but would drop very low once the rpms came down----------We wound up changing the defective cam bearings,,,,Note: this is a last resort..The bright side of this problem is that you caught it in time,......

Re: Low oil pressure in ZL-1
 

You did put the relief valve in pointing the right way?

Re: Low oil pressure in ZL-1
 

Yes, wrong or loose cam bearings could do it. My machinist said the ZL-1 cam bearings were not standard BBC, he put in Dart Block bearings-Durabond HP cam bearings GMP-12. Just throwing things out there.

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
You did put the relief valve in pointing the right way?

[/ QUOTE ]

OK which is the right way??..looked to be only one way but ......


also noticed when we were running the oil pump with a drill it never seemed to load up when it caught prime..Usually they really need some power to turn..this one never seems to prime and load the drill..maybe bad oil pump??

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
Yes, wrong or loose cam bearings could do it. My machinist said the ZL-1 cam bearings were not standard BBC, he put in Dart Block bearings-Durabond HP cam bearings GMP-12. Just throwing things out there.

[/ QUOTE ]

aware of the different cam bearings for this block..did buy the right one..but..we are going to re-check everything now..gonna pull some caps and make sure all is well

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
[ QUOTE ]
You did put the relief valve in pointing the right way?

[/ QUOTE ]

OK which is the right way??..looked to be only one way but ......


also noticed when we were running the oil pump with a drill it never seemed to load up when it caught prime..Usually they really need some power to turn..this one never seems to prime and load the drill..maybe bad oil pump??

[/ QUOTE ]

Yes.

As stated previously,especially with cold oil the drill should kick back on you. If you aren't feeling that there there obviously is a problem. One thing you can do listen carefully because sometimes you will hear a gurgling or dripping sound where the oil pressure is being bled off. Are you running a roller cam in this motor? What type of lifter are you running??

If you would like to PM me I can carry you through this a little further. You also are more than welcome to call me at my shop (973)-267-4364.

MB

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
You did put the relief valve in pointing the right way?

[/ QUOTE ]




As stated previously,especially with cold oil the drill should kick back on you. If you aren't feeling that there there obviously is a problem. One thing you can do listen carefully because sometimes you will hear a gurgling or dripping sound where the oil pressure is being bled off. Are you running a roller cam in this motor? What type of lifter are you running??

If you would like to PM me I can carry you through this a little further. You also are more than welcome to call me at my shop (973)-267-4364.

MB

[/ QUOTE ]

thanks Mike..running a Liunati solid roller..either comp or redline/redzone/redsomething roller lifters..nothing new or exotic..really has me scratching my head..12 hrs till engine removal https://www.yenko.net/ubbthreads/images/graemlins/no.gif

Re: Low oil pressure in ZL-1
 

Leave the motor in. Load the car on a Reliable truck to southern California and I will send you a check or wire the money to you. Then you can build another restored car and we can all watch the pictures again.
Mark Sheppard

Re: Low oil pressure in ZL-1
 

BTW... Since you have so much to say, the machinist did my motor as well. And runs like a raped APE... By the way, do you have any el-camino parts for sale ????? Or other parts???

Re: Low oil pressure in ZL-1
 

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