WAY to much oil pressure on first fire - Chevelle Tech
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post #1 of 33 (permalink) Old Mar 10th, 20, 8:58 AM Thread Starter
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Sam
 
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WAY to much oil pressure on first fire

Went to fire the Blue Print 598 last night, and it broke my Autometer gauge AND the mechanical gauge. It also blue the O-ring out of the K&N oil filter. A Wix Racing filter was then spun on (which held) but estimated PSI was probably 150+. A brand new standard pressure, high volume pump is what BP Said to use, and that’s what is on there. Any ideas? I’m at my wits end with this car...
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post #2 of 33 (permalink) Old Mar 10th, 20, 10:21 AM
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Re: WAY to much oil pressure on first fire

Did you by chance weld the pickup tube to the pump before installing it? If so, it sounds as if the relief valve is stuck.At any rate, you will need to disassemble the pump to free up the relief valve.
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post #3 of 33 (permalink) Old Mar 10th, 20, 10:45 AM Thread Starter
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Quote:
Originally Posted by modern malibu View Post
Did you by chance weld the pickup tube to the pump before installing it? If so, it sounds as if the relief valve is stuck.At any rate, you will need to disassemble the pump to free up the relief valve.
Thanks for the reply. Definitely looking that way...

Last edited by davewho1; Mar 10th, 20 at 6:08 PM. Reason: fixed quote
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post #4 of 33 (permalink) Old Mar 10th, 20, 10:54 AM
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Re: WAY to much oil pressure on first fire

I don't know that this applies in any way to your situation, but I was always told to remove the relief valve and spring before welding the pickup on.
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post #5 of 33 (permalink) Old Mar 10th, 20, 11:47 AM
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Re: WAY to much oil pressure on first fire

Quote:
Originally Posted by Droptop72 View Post
I don't know that this applies in any way to your situation, but I was always told to remove the relief valve and spring before welding the pickup on.
Heat from welding the tube could fatigue the spring causing low oil pressure.

*Jeff*

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post #6 of 33 (permalink) Old Mar 10th, 20, 12:13 PM Thread Starter
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Quote:
Originally Posted by Droptop72 View Post
I don't know that this applies in any way to your situation, but I was always told to remove the relief valve and spring before welding the pickup on.
The tube was so tight, It was put in with a rubber mallet. Thinking the top cover may have been slightly indented causing the spring to be frozen in place?
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post #7 of 33 (permalink) Old Mar 10th, 20, 2:31 PM
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Re: WAY to much oil pressure on first fire

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Originally Posted by Hotwire View Post
Heat from welding the tube could fatigue the spring causing low oil pressure.

True, but I also wonder if the heat couldn't cause the valve to seize in the bore, or if a stray glob from a weld spark couldn't jam it and not allow it to move. Doesn't seem to apply to this situation, but I have always wondered about the possibility.
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post #8 of 33 (permalink) Old Mar 10th, 20, 3:02 PM
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Re: WAY to much oil pressure on first fire

WOW! 150 PSI??? And here I was being a little concerned about the oil pressure in my 632cid engine being 79 PSI .... you said that your oil pressure gauge(s) were being maxed out. What's the max for the gauge(s) you used? Do you know what brand of block Blue Print uses? World, Brodix, or Dart? And is that a Tall deck or standard deck height 598 you have? I'm just wondering if oil restrictors were used to limit the oil going to the heads, and if so, if that can send the oil pressure sky-high if very small restrictors were used.
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post #9 of 33 (permalink) Old Mar 10th, 20, 4:29 PM
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What weight oil were you using ? Although at 150 psi more than oil weight pbly the pump relief spring

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post #10 of 33 (permalink) Old Mar 10th, 20, 4:47 PM Thread Starter
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Quote:
Originally Posted by BillyGman View Post
WOW! 150 PSI??? And here I was being a little concerned about the oil pressure in my 632cid engine being 79 PSI<img src="https://www.chevelles.com/forums/images/smilies/confused.gif" border="0" alt="" title="Confused" class="inlineimg" /> .... you said that your oil pressure gauge(s) were being maxed out. What's the max for the gauge(s) you used? Do you know what brand of block Blue Print uses? World, Brodix, or Dart? And is that a Tall deck or standard deck height 598 you have? I'm just wondering if oil restrictors were used to limit the oil going to the heads, and if so, if that can send the oil pressure sky-high if very small restrictors were used.
It’s a short deck, and a Blue Print block. Gauge maxes at a 100, and it pegged it immediately.
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post #11 of 33 (permalink) Old Mar 10th, 20, 6:44 PM
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Re: WAY to much oil pressure on first fire

OK, we need to go over what welds to what. CAST IRON doesn't weld well, not even to itself, and, many pickups that have been cold or other types welded, brazed to pump covers end up falling out of the caps. Other issues occur as well, such as relief pressures being way too high from welding heat related distortion.

I'd say to look the various places on the block, filter and pump for problems, especially the pressure reliefs in the pump, and big blocks.

When I build a small, or big block, I use a big block regular pressure pump, and nothing else. Easy modification to clear the rear crank throw and rods.

One thing I do to the pumps ia NOT weld/braze the pickup to the cover, but fabricate a steel bracket that bolts to the pump cover bolts, and around the pickup tube to hold it n place. These prackets are also available already built, and ready to install on the pump and pickup, no hassles, no welding, no brazing, no excess heat.
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post #12 of 33 (permalink) Old Mar 10th, 20, 9:48 PM
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Re: WAY to much oil pressure on first fire

Quote:
Originally Posted by Dave Ray View Post
OK, we need to go over what welds to what. CAST IRON doesn't weld well, not even to itself, and, many pickups that have been cold or other types welded, brazed to pump covers end up falling out of the caps. Other issues occur as well, such as relief pressures being way too high from welding heat related distortion.

I'd say to look the various places on the block, filter and pump for problems, especially the pressure reliefs in the pump, and big blocks.

When I build a small, or big block, I use a big block regular pressure pump, and nothing else. Easy modification to clear the rear crank throw and rods.

One thing I do to the pumps ia NOT weld/braze the pickup to the cover, but fabricate a steel bracket that bolts to the pump cover bolts, and around the pickup tube to hold it n place. These prackets are also available already built, and ready to install on the pump and pickup, no hassles, no welding, no brazing, no excess heat.
My oil pump pickups are welded, and they don't break. Heli Arc silicon bronze.

BTW we have cast iron welded blocks and heads to some of the highest dollar muscle cars known to man, with excellent results, making many customers VERY happy in the process, and blown away saving their blocks and heads they thought could never be salvaged.
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Last edited by VORTECPRO; Mar 10th, 20 at 10:15 PM.
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post #13 of 33 (permalink) Old Mar 10th, 20, 10:27 PM
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Re: WAY to much oil pressure on first fire

Example of cast iron welding uniting a very expensive Motion stage 3 Chevelle with its numbers matching engine. Cam tunnel reconstructed via cast iron welding.



240 mile 1969 Berger COPO Camaro, reunited with its original block via cast iron welding, cam tunnel reconstruction.
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post #14 of 33 (permalink) Old Mar 10th, 20, 11:02 PM
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Re: WAY to much oil pressure on first fire

Quote:
Originally Posted by VORTECPRO View Post
Example of cast iron welding uniting a very expensive Motion stage 3 Chevelle with its numbers matching engine. Cam tunnel reconstructed via cast iron welding.



240 mile 1969 Berger COPO Camaro, reunited with its original block via cast iron welding, cam tunnel reconstruction.
Mark, any pictures of that reconstructed block ? that should be some great footage to see pics of.

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post #15 of 33 (permalink) Old Mar 10th, 20, 11:09 PM
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Re: WAY to much oil pressure on first fire

Was this a crate engine or just a short block?? If it is a crate engine, did you contact the manufacturer to see if they will take care of the problem??

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