Low oil pressure in ZL-1

[Alss]

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Have you replaced the pressure relief valve?

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this block does not use one.....bowtie design thanks for the good ideas..keep them coming..gotta be a simple answer

[427king]

Pull motor,drop pan,change pump.Dyno. Lastly, dont assume you cant have crud [or a blocked screen] in a brand new motor. Have seen many silicone/gasket material blocked motors too.

[Alss]

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Pull motor,drop pan,change pump.Dyno. Lastly, dont assume you cant have crud [or a blocked screen] in a brand new motor. Have seen many silicone/gasket material blocked motors too.

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I agree..motor is coming out tomrrow and will be inspected thoroughly..Ill post the findings

[68CamSS]

Triple check the bearings.

[iluv69s]

Probably not the problem, but I bought an all rebuilt ZL1 motor and when dynod it had problems similar...The builder forgot to put in the 2 extra studs in each head that are only on a ZL1 motor...water was mixing with the oil and we had poor oil pressure when warmed up...after fixing problem, the motor dynod at 603 HP with LOTSSS of oil pressure!!! Bolts can be used if you cannot find the correct studs....but they need to be drilled and wiretied after torquing....hope that helps...good luck!!

[Joe69Camaro]

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

[camarojoe]

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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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Welcome Joe. Just an FYI, Everyone here is just trying to help out. No need to jump down anyone's throat.

[Joe69Camaro]

Sorry, Just frustrated on this one... Really did not mean to be disrespectful to any one !!!!!

[427king]

Im sure there is someone out there that read iluv69s post and learned something that may help them down the road and thats the important thing. Both air and water in oil can cause low pressure readings and foaming in case anyone encounters that again.

[iluv69s]

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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