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| | | | Joined: Apr 2005 Posts: 396 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 396 | What can I expect to happen when I run my new engine with old 30 lb gauge? Peg needle? Destroy that gauge? Blow out and make a mess under dash and cab? Should I be pulling gauges and install a 60 lb gauge prior to engine start? Thanks Jerry
Last edited by 1951Chevy1Ton; 02/19/2013 3:13 PM.
Jerry
| | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Yes it will peg, I've run one like this for years. Or you can get a 60# GMC gruck ga. fits right in. | | | | | Joined: Jan 2010 Posts: 4,263 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | Your original 30 lb gauge will likely out last the new reproduction 60lb.
| | | | | Joined: Apr 2007 Posts: 1,038 'Bolter | | 'Bolter Joined: Apr 2007 Posts: 1,038 | I have had the stock 30# gauge in my '42 for 15 years and in my COE for 1 year, both have later high pressure 235s. I have had no problems with either. You do peg the gauge when driving but when warmed up you get a reading at idle. You don't know how high the pressure is, but the gauge functions as it should to warn you of TOO LOW pressure.
I doubt the gauges are very accurate anyway. I tested my COE engine with a quality oil pressure gauge hooked up at the block and it pegged at 42#, which I assume is where the pressure relief valve is set and after warming up would idle at 30#. After installing the gauge with it's very long oil line (in the COE it must go forward and up and then back through the firewall) I will get start up readings pegging the gauge, however, hot idle readings are 10# but I don't believe it. As long as it behaves as it usually does I am not going to worry.
Unless your wallet is too fat or you just want something to tinker with, I would leave it alone.
Kent
| | | | | Joined: Apr 2005 Posts: 396 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 396 | OK Guys, The idea that if its not broke , don't fix it sounds very good to me! Jerry
Jerry
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