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Old 09-01-2003, 07:44 PM
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Oil pressure on 350 Chevy

My 350 has very low pressure when at idle. I just changed the oil and also added a new guage. It still shows that its low. Is my next step a new pump?

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Old 09-01-2003, 07:49 PM
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how low is it? how many miles are on the engine? keep in mind, most gauges are not accurate under 10psi, some aren`t under 15. As long as the engine has a 10 psi increase per 1000 RPM it should be okay, and when at idle you don`t here any valves clattering, however, if there is high milage on the engine, you can do this little trick, go to your nearest car quest parts store, get a can of "Sea Foam" pour it in, let the engine idle for 15 minutes, then change the oil and filter, you`ll be amazed at the crud that will come out with your oil.
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Old 09-01-2003, 07:53 PM
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If its an electrical gauge is the old sending unit compatable with the new?
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Old 09-01-2003, 09:18 PM
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The new one is electrical with a new sending unit. Pressure shows around 15 psi.
DoubleVision, I have never heard of "Sea Foam"
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Old 09-02-2003, 03:02 AM
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15 PSI is fine at idle, I have a can of sea foam in the shop. Need more proof? check this site:
http://www.seafoamsales.com/
not suprised you`ve never heard of it, this stuff has been around over 50 years.
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Old 09-02-2003, 06:48 AM
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DoubleVision, I'm gonna try your SeaFoam tip on my next oil change for my El Camino. It seems to have a sticking lifter, hope the SeaFoam helps. Thanks for the tip.
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Old 09-02-2003, 08:50 AM
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yeah, the only problem with Seafoam is when the "CRUD" is creating a seal on your otherwise SPENT seats...you clean out the crud and suddenly you're in skewed city. lol
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Old 09-02-2003, 11:18 AM
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Quote:
get a can of "Sea Foam" pour it in, let the engine idle for 15 minutes, then change the oil and filter, you`ll be amazed at the crud that will come out with your oil.
I'm going to have to try and find this stuff, hey one question should do a second oil change after flushing with this? i.e. Run Seafoam, change oil, run a day or 2 and change oil again?

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Mark
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Old 09-02-2003, 12:33 PM
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It sounds like I am not the only one to ever hear of Sea Foam. I looked at the web site today and the product sounds great. Just changed my oil yesterday and going to run it for a day or two and change again after Sea Foam. Hope it works.
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Old 09-13-2003, 10:01 PM
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I just used the Sea Foam on my truck today. After only 150 miles on the oil, it looked like I had 3000 miles on it when I changed it. I think it did clean the engine a little.
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