Only happens in cold temperatures
Flush the system once then ise an additive or thinner oil
It's not a weak oil pump. The cold temperatures can affect the how fast the pressure builds up and move the gauge. What I would like for you to do is kind of notice the gauge to see if it drops after engine has warmed up. Reason being if it does it can be a faulty oil pressure switch or connector. If no drops then try a thinner oil like previously stated.
When it's cold outside, the oil inside the engine is just as cold. My 99 Silverado does not like starting when the temp gets below 10 degrees any more than I like going out in that temp and starting it. I have the engine block heater in my truck and I ALWAYS plug it in the evening before I know I'm going to use it. I also run Mobil 1 Full Synthetic 5W30 oil in it. 5W30 is a very light oil that will resist cold weather thickening sufficiently enough that it will start flowing immediately after starting. I know some people think that a heavier oil should be used in the winter, but that is absolutely wrong thinking. USE THE LIGHTEST OIL YOUR OWNERS MANUAL RECOMMENDS IN WINTER!!!!!!!!! Most modern vehicles owners manuals recommend 5W30 used year-round as the recommended oil, but 10W30 may be used if the temp will be above 0 degrees for the majority of the next oil service life. However, the most modern vehicles, i.e. those built since 2008 may require 5W30 only, or 5W20 as well. CHECK YOUR OWNERS MANUAL FOR THE PROPER OIL WEIGHT FOR YOUR VEHICLE!!!!!!! Some vehicles even go so far as to REQUIRE synthetic oil. Any 2011 or newer GM vehicle MUST use synthetic oil that has Dexos on the label. At this time, only synthetic oils have the Dexos rating in them. If your vehicle calls for using only 0W20, then only synthetic oils are made to 0W20 specs. DO NOT USE ANY WEIGHT OF OIL YOUR ENGINE IS NOT RATED TO USE!!!!! Just forget about 10W40 or 20W50. Your dealership will just look at you and tell you your broken engine no longer is covered by the manufacturers warranty if you use an unapproved oil for your engine. Again, check your owners manual for the recommended oil weight for your vehicle.
SOURCE: Engine noise cold
these motors made some noise when cold normally due to the clearance. Is it more than that? Have you tried removing plugs and soaking pistons overnight with topengine cleaner this will loosen carbon which makes some cold noise problems.
SOURCE: oil pressure high when engine cold. but fine when engine is warm
It is normal for oil pressure to be higher when the oil is cold. As the oil heats up, it will thin out. Since your oil pump is driven faster with the acceleration of the engine, your pressure will also increase. On a engine up to full temp, your oil pressure will probably be around 20 psi and maybe up to 60 at full load. But on a cold engine, you may see 60 psi at idle. I dont know if your high oil pressure is causing your vehicle to stall, but maybe your running the wrong weight/type of oil for your truck. If you live in a extreme cold area, you may want to look into a block heater to help warm up your engine faster.
SOURCE: 1993 Chevy Blazer 5.7L V-8,
Yes. Definitely. The oil pump is just weak. The veins in the oil pump get worn and to not keep the oil pressure up. Along with the oil gets thinner as the oil warms up. It makes it more difficult to pump. Another suggestion is Slick 50 for high mileage vehicles. This stuff really works. It is the first thing that I put in my vehicles the day I buy them.
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