My 7M makes about 10 psi at hot idle and about 35 on the highway. This is using 5w-30 synthetic. Oil pump has been shimmed 5mm. Basically between the low pressure and all the rod knocked 7M's I see, I worry about it. Is this pressure normal?
7MGTE oil pressure
- Thread starter jake8790
- Start date
TSRM Page LU-4
The 3000 RPM pressure reading is more important. 35 PSI is on the low end of the pressure scale, but acceptable.
The 3000 RPM pressure reading is more important. 35 PSI is on the low end of the pressure scale, but acceptable.
particularly considering that you're using synthetic.
I've always had slightly lower pressure readings with it vs. dyno oil.
I've always had slightly lower pressure readings with it vs. dyno oil.
There has been much written about oil pressure vs: oil flow in earlier threads and some have rather strong opinions about this issue. Stock spec's for oil pressure are lower than yours, and the most members seem to believe that your numbers are entirely adequate. For other performance engines I have always used the rule of 10 psi per 1000 rpm, however the 7M is reported to need less. In spite of all those who claim the 7M pumps flow high volume at low pressure and thus you don't need the higher numbers we might be used to on other engines, Aaron at Driftmotion offers a modified oil pump which is claimed to increase oil pressure to about 15-18 at hot idle. Perhaps he knows something the other "experts" don't.
Your oil pressure is fine. Run an extra quart over full.
If you want to look at the pressure you need a diagnostic gauge anyways. The stock oil gauge is about as accurate as a special ed kid in math class anyways.
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If you want to look at the pressure you need a diagnostic gauge anyways. The stock oil gauge is about as accurate as a special ed kid in math class anyways.
Sent from my Galaxy Nexus using Tapatalk 2
^ This. As for Driftmotion, paraphrasing Ronald Reagen is helpful: it's not that they're ignorant, just that they know so much which isn't so...