Very low oil pressure.
11-23-2015, 10:58 PM
#1
Very low oil pressure. I just picked up an 00 WS6 trans am and it's having an oil pressure issue. Has an iron block motor in it, was told that it was an LQ4, but it has 853 heads on it, so no idea. The oil pressure gauge was reading about 10PSI cold and not moving with the engine speed, 0 PSI hot and check gauges.
No engine noise of any kind, so I figured it was probably a bad sender, went Roadkill and drove the bitch 170 miles home. Cruised about 80MPH the whole way home, oil pressure stayed around 10PSI. I also idled for at least 5 minutes with all the stop lights.
Hooked up a mechanical gauge today and it's showing 10PSI cold idle.... HMMM well that aint good.
The pickup tube O ring and barbell are on my hit list, but is there anything on the LQ4 that might stop oil from getting up to the intake? Just don't see going that damned far and not damaging the bearings. First thing tomorrow is hacking the oil filter open to see if there is metal, but I am not seeing anything on the dipstick.
No engine noise of any kind, so I figured it was probably a bad sender, went Roadkill and drove the bitch 170 miles home. Cruised about 80MPH the whole way home, oil pressure stayed around 10PSI. I also idled for at least 5 minutes with all the stop lights.
Hooked up a mechanical gauge today and it's showing 10PSI cold idle.... HMMM well that aint good.
The pickup tube O ring and barbell are on my hit list, but is there anything on the LQ4 that might stop oil from getting up to the intake? Just don't see going that damned far and not damaging the bearings. First thing tomorrow is hacking the oil filter open to see if there is metal, but I am not seeing anything on the dipstick.
11-24-2015, 01:17 PM
#4
Cracked open the oil filter and nothing. No metal to speak of, so I highly doubt that a bearing is acting up. Also changed the filter just to rule it out, no change. Someone probably pinched the pickup tube O ring when they changed the pan over.
11-25-2015, 06:22 PM
#6
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Yeah. Most of the literal "pressure" is developed at the restrictions or passages like the crankshaft or the camshaft. Whichever it sees first. (Usually crank shaft passages and galleys)
If you're seeing metal in the oil pan then it sounds like you know what to do. Unless you want to try and see how long it will last with a new pump. Pick up a nice Melling piece for a good price now days if that's what you're leaning toward.
If you're seeing metal in the oil pan then it sounds like you know what to do. Unless you want to try and see how long it will last with a new pump. Pick up a nice Melling piece for a good price now days if that's what you're leaning toward.
11-25-2015, 06:27 PM
#7
Yeah. Most of the literal "pressure" is developed at the restrictions or passages like the crankshaft or the camshaft. Whichever it sees first. (Usually crank shaft passages and galleys)
If you're seeing metal in the oil pan then it sounds like you know what to do. Unless you want to try and see how long it will last with a new pump. Pick up a nice Melling piece for a good price now days if that's what you're leaning toward.
If you're seeing metal in the oil pan then it sounds like you know what to do. Unless you want to try and see how long it will last with a new pump. Pick up a nice Melling piece for a good price now days if that's what you're leaning toward.
