Low oil pressure in ZL-1 - Page 6

JoeG · #51 03-13-2009, 12:10 AM

****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,......

**69SSZL1** · #52 03-13-2009, 12:26 AM

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

**69SSZL1** · #53 03-13-2009, 12:34 AM

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.

**Alss** · #54 03-13-2009, 12:39 AM

[ 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??

**Alss** · #55 03-13-2009, 12:40 AM

[ 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

HPMIKE · #56 03-13-2009, 03:53 AM

[ 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

**Alss** · #57 03-13-2009, 04:10 AM

[ 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

**92646** · #58 03-13-2009, 04:25 AM

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

Joe69Camaro · #59 03-13-2009, 05:12 AM

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???

Joe69Camaro · #60 03-13-2009, 05:37 AM

NO COMMENT 427 SILICONE KING

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