Re: Low oil pressure in ZL-1
 

Joe, I warned you once about personal attacks, this is warning #2. Take your bickering/name calling/parts requests/whatever to PM's. There will be no third warning.

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
Joe, I warned you once about personal attacks, this is warning #2. Take your bickering/name calling/parts requests/whatever to PM's. There will be no third warning.

[/ QUOTE ]

For this reason I have had to refrain from a comment on my personal opinion on this matter. Your engine has a assembly error, to take a risk of damage of your good investment and diagnose it in the car running is rediculous! at the risk of your wallet, your taking a chance of spinning a main bearing and destroying a main journal, cranks are cheap that block is not. Take it out find the problem, When things go wrong its best to just go back and find the problem, not build a new one!! The bypass valve was a good start if it did not work you need to find the problem, the block is a mix of early oiling and the newer gen 6 priority main oiling system same as the iron bow tie blocks, its a good system but no room for error. There are a few common trait problems with them, one is if they alighn bore the rear main cap is too tight, needs to have .005 clearance, this is a typical big mistake with them, If you do not use the gm oil pump and a manley m77 instead they will sit on the inner most stud on the rear cap and areate the oil when it gets hot the psi is even lower, and most the time the pump base cracks when torqued. None of this may be the problem, but to diagnose it in the car versus the small expense of pulling it and finding the problem is in your wallet.

Re: Low oil pressure in ZL-1
 

Albert,

Remember today is Friday the 13th, Perhaps you wait till Saturday to pull your engine. Good Luck!

Dan.

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
[ QUOTE ]
Joe, I warned you once about personal attacks, this is warning #2. Take your bickering/name calling/parts requests/whatever to PM's. There will be no third warning.

[/ QUOTE ]

For this reason I have had to refrain from a comment on my personal opinion on this matter. Your engine has a assembly error, to take a risk of damage of your good investment and diagnose it in the car running is rediculous! at the risk of your wallet, your taking a chance of spinning a main bearing and destroying a main journal, cranks are cheap that block is not. Take it out find the problem, When things go wrong its best to just go back and find the problem, not build a new one!! The bypass valve was a good start if it did not work you need to find the problem, the block is a mix of early oiling and the newer gen 6 priority main oiling system same as the iron bow tie blocks, its a good system but no room for error. There are a few common trait problems with them, one is if they alighn bore the rear main cap is too tight, needs to have .005 clearance, this is a typical big mistake with them, If you do not use the gm oil pump and a manley m77 instead they will sit on the inner most stud on the rear cap and areate the oil when it gets hot the psi is even lower, and most the time the pump base cracks when torqued. None of this may be the problem, but to diagnose it in the car versus the small expense of pulling it and finding the problem is in your wallet.

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Jeff this site is about sharing common interests and helping other members. Great post, keep them coming. Again the wealth of info on this site is amazing. Thanks for enlightening me and our members. https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Re: Low oil pressure in ZL-1
 

Agreed Steve. Unfortunately all this information is coming at Al's expense.

Wish I had something constructive to offer Al. It's easy for me to sit here and throw out opinions but for 'insurance purposes only', I think you're doing the right thing. I'd pull it and take it down. That's a serious investment and I'd tend to err on the side of caution. Here's hoping you find something that's quick, easy and inexpensive to correct. It's gonna be one helluva ride when she's ready. https://www.yenko.net/ubbthreads/imag...ns/worship.gif


(all this said on Friday the 13th. https://www.yenko.net/ubbthreads/imag...lins/crazy.gif)

Re: Low oil pressure in ZL-1
 

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WOW... Can some people not read ???? AIR IN OIL...NOT WATER
BB head problems with studs and bolts are common.... This is NOT

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WOWWW is correct.....Ive been out of the country this past week and have not been on this site...or the net for that matter.I must first say that I am very disappointed at the response to my attempt to suggest a possible reason for this problem.I am the first to say that I am the furthest thing from a mechanic and I even qualified my suggestion as probably not the problem.It is rather unbelievable to me that a person asks to keep the ideas coming and then I am treated as if I am an idiot when I try and help by suggesting a possible solution.

I have no expertise whatsoever mechanically, only my personal experience....fact..when I blew a head gasket in my car years ago, the water mixed with the oil and "the oil was foaming and the oil pressure continued to drop" as that was the way I realized the problem...
Another fact..."Yes I can read" and I have reread this thread a few times and cannot seem to see where it was stated that "the problem was air mixing with the oil"... or did I miss that part??
Another fact...head bolt/stud problems are common, agreed, but I do not believe that the 4 extra studs on the ZL1 motor can be very common as these motors are not so common. Or am I incorrect and all of you have come across ZL1 motors that the professional mechanics/engine builders forgot to put in the extra studs??

I have in the past had some conversations with fellow site members when I was not happy or had a problem for whatever reason...but ALWAYS in a private matter.

I will definitely hesitate to add my .02 in the future even if I am 100% sure I can help. ....I sincerely apologize for wasting everyone here`s time with my suggestion.

And not that I need to be stuck up for, but thanks 427KING, and others for your efforts.

once again, I quote....WOWWWWWWWWWWWWW

Re: Low oil pressure in ZL-1
 

You weren't wasting my time---It was good you put your iron in the fire to try and help with the problem...As for the sarcastic comments made by someone else.........Who gives a ##%^ about that.........The issue is to help a member............

Re: Low oil pressure in ZL-1
 

Believe me Joe.....these comments dont bother me in the least...Life is way too short!!!!

I just hope people realize what a great resource this site is and that certain comments and attitudes only help to diminish the quality and quantity of information that comes forth. I have been greatly educated and helped on many occasions because of this site and its members....

https://www.yenko.net/ubbthreads/imag...ns/worship.gif https://www.yenko.net/ubbthreads/imag...ns/worship.gif https://www.yenko.net/ubbthreads/imag...ns/worship.gif https://www.yenko.net/ubbthreads/imag...ns/worship.gif


..and I do wish luck to the owner on figuring the problem quickly and getting that aluminum beast melting those tires!!!!
https://www.yenko.net/ubbthreads/imag...ns/burnout.gif https://www.yenko.net/ubbthreads/imag...ns/burnout.gif

Re: Low oil pressure in ZL-1
 

does the distributor body require an o-ring at the cam tunnel?

Re: Low oil pressure in ZL-1
 

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does the distributor body require an o-ring at the cam tunnel?

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dont know..using a MSD distributor though..it comes with two O rings but states that they are for motors with a beveled dist mount..this on is machined at a 90 deg angle so I dont think it uses any..please tell me if I am wrong!!

Well, was at the machine shop till late..and verified in front of the machinist that there is only 28 psi cold..pulled the pump and tested it in a bucket of oil(from the motor) and it made almost 80 psi!..and nearly twisted the drill out of his hands..pump is a Melling HV unit...bearings look good nothing out of the ordinary for a motor with only an hour on it..has us both scratching our heads.he tearing the whole motor down later today or on Monday and we are researching the oilong system to see what we have missed..has to be something. Thanks for everyones help and patience

ALbert