Gamer Posted May 21, 2006 Share Posted May 21, 2006 Just curious what is an acceptable pressure reading when at idle with a fully warmed up engine. My gauge is reading around 1.5 bar at idle (hot). Should I be concerned or is that an OK reading ? Quote Link to comment Share on other sites More sharing options...
Guest Usmann A Posted May 21, 2006 Share Posted May 21, 2006 Mine reads 2.0-2.1 bar on idle oil at 85 degrees C. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 21, 2006 Share Posted May 21, 2006 We see between 0.9 & 2.5 between new and older engines. Be carefull if it gets below 1 Bar on idle & check the level. What are you seeing at 6000RPM? Quote Link to comment Share on other sites More sharing options...
Guest Usmann A Posted May 21, 2006 Share Posted May 21, 2006 General rule on the 2JZ is roughly 15 psi every 1000rpm. guideline. IIRC Quote Link to comment Share on other sites More sharing options...
Gamer Posted May 21, 2006 Author Share Posted May 21, 2006 We see between 0.9 & 2.5 between new and older engines. Be carefull if it gets below 1 Bar on idle & check the level. What are you seeing at 6000RPM? I will have to check on what I get at 6000k... bit hard to do today with all the water coming down. It has never gone down to 1 bar yet. I have the defi controller and the warning is set to 1.5 bar. It is dipping ever so slightly below that, just enough to activate the warning. I will check the oil level once it stops raining outside. Cheers Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 21, 2006 Share Posted May 21, 2006 General rule on the 2JZ is roughly 15 psi every 1000rpm. guideline. IIRC Yes thats what we tend to see on new engines, but 7 Bar is a littel too much really, hence he oil relief valve Mod. Although Toyota did this themselfs in recent years after ths Substitue part for teh oil pump. Quote Link to comment Share on other sites More sharing options...
b_have Posted May 21, 2006 Share Posted May 21, 2006 General rule on the 2JZ is roughly 15 psi every 1000rpm. guideline. IIRC Have you modded your pump or breather system re front crank seal? Mine was reving to 7250 yesterday (raised the rev limit on the EMU), no seal probs yet but have a feeling its a time bomb Quote Link to comment Share on other sites More sharing options...
bignum Posted May 21, 2006 Share Posted May 21, 2006 my oil pressure is 25psi on idle and have seen 120psi @ 6k revs, both with oil at 95 d/c, is this too high? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 21, 2006 Share Posted May 21, 2006 my oil pressure is 25psi on idle and have seen 120psi @ 6k revs, both with oil at 95 d/c, is this too high? I would say you at risk of blowing out your Front main crank seal yes (common). Check your breather system Quote Link to comment Share on other sites More sharing options...
b_have Posted May 21, 2006 Share Posted May 21, 2006 my oil pressure is 25psi on idle and have seen 120psi @ 6k revs, both with oil at 95 d/c, is this too high? Wow, thats more than 8bar. No crank seal probs? Where is your sensor located? Quote Link to comment Share on other sites More sharing options...
bignum Posted May 21, 2006 Share Posted May 21, 2006 Wow' date=' thats more than 8bar. No crank seal probs? Where is your sensor located?[/quote'] im touching wood right now!, no, no seal probs, my sensor is in a filter sandwich plate, only had it about a month though. Quote Link to comment Share on other sites More sharing options...
bignum Posted May 21, 2006 Share Posted May 21, 2006 lucifer, how do i go about checking my breather system, also i fitted a p/e oil filter at the same time as pressure gauge, i thought these were supposed to flow better?. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 21, 2006 Share Posted May 21, 2006 lucifer, how do i go about checking my breather system, also i fitted a p/e oil filter at the same time as pressure gauge, i thought these were supposed to flow better?. Sure to flow better, but oil pressure is affected by ALOT more than your oil filter. HOw many miles do you have? Quote Link to comment Share on other sites More sharing options...
Guest Usmann A Posted May 21, 2006 Share Posted May 21, 2006 Worn gear teeth on the pump raise the oil pressure higher too. You have to remember that sandwhich plate senseing, the 1/8 holes direct the oil to flow 90degrees and thus a restriction, so senseing oil pressure there would be one of the higest places to measure from. Now whats nice is that you measure the drop Pre cooler assembly and after. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 21, 2006 Share Posted May 21, 2006 Worn gear teeth on the pump raise the oil pressure higher too. You have to remember that sandwhich plate senseing, the 1/8 holes direct the oil to flow 90degrees and thus a restriction, so senseing oil pressure there would be one of the higest places to measure from. Now whats nice is that you measure the drop Pre cooler assembly and after. I have been wondering about this also, my pressure is never lower than 35PSI hot at idle and is up to 90PSI by 3-4,000 RPM this is measured at the sandwich plate, i even changed the oil grade from 10W 40 to 5W 30 in an effort to reduce the pressure, as i though it may have been responsible for my FMS going. Quote Link to comment Share on other sites More sharing options...
bignum Posted May 21, 2006 Share Posted May 21, 2006 Sure to flow better, but oil pressure is affected by ALOT more than your oil filter. HOw many miles do you have? just gone past 60k Quote Link to comment Share on other sites More sharing options...
bignum Posted May 21, 2006 Share Posted May 21, 2006 i was always led to believe that high crankcase pressure is the problem behind blown front seals, caused by excessive blow-by not high oil pressure? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted May 21, 2006 Share Posted May 21, 2006 Yes this is generally the case, but High oil pressure certainly does not help the situation. Check your one way check valve is working properly on teh Intake cam cover by blowign through it both ways, it shoudllock up instantly. Well.. theres a start anyway Quote Link to comment Share on other sites More sharing options...
supra matt Posted October 9, 2006 Share Posted October 9, 2006 Hi bignum did you sort this? as mine is about the same as yours and my oil temp go's upto 100deg c just sitting at 70 to 80 mph! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 10, 2006 Share Posted October 10, 2006 Hi bignum did you sort this? as mine is about the same as yours and my oil temp go's upto 100deg c just sitting at 70 to 80 mph! If your measuring the temp and pressure at the sandwich plate thats about right, i have seen oil temps of 117C at sustained high speed, and pressures well over 100psi but i think a lot of it is down to the location, i also think it is designed to be a hot running engine for emissions purposes, i intend to get around to putting a temp sensor in the sump for a better temp indication, however i think i will add an oil cooler next year;) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 10, 2006 Share Posted October 10, 2006 i was always led to believe that high crankcase pressure is the problem behind blown front seals, caused by excessive blow-by not high oil pressure? Correct, the only times I see blown front seals is on buggered engines with excess blow by, usually caused by too much boost causing det, and hence ring and / or piston damage. As for worn "teeth" on the oil pump raising the oil pressure, I think that rewrites the physics book.... Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted October 10, 2006 Share Posted October 10, 2006 right my catch tank is going in asap then Quote Link to comment Share on other sites More sharing options...
Digsy Posted October 10, 2006 Share Posted October 10, 2006 Worn gear teeth on the pump raise the oil pressure higher too. I have to ask how this can happen? Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted October 16, 2006 Share Posted October 16, 2006 lucifer, how do i go about checking my breather system, also i fitted a p/e oil filter at the same time as pressure gauge, i thought these were supposed to flow better?. This is interesting as I have started to use the P/E filters myself. Perhaps they are the cause. After all, they do filter much better than the average filter, and it is logical that this could increase pressure as it could be acting to restrict oil flow. Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 16, 2006 Share Posted October 16, 2006 Worn gear teeth on the pump raise the oil pressure higher too.. So if we take this to the limit, would a toothless pump produce infinite oil pressure? http://www.max-boost.co.uk/stuff/nice_smile.jpg Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.