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ahu tdi oil pressures by hillfolk'r on 10 Feb, 2006 22:26
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what are normalpressures for a 98 tdi ahu
,,my tach isnt hooked up yet,but at idle warmed up its 20-25 psi,,and 50-55 maybe 60 at cruise on hiway around 65 mph,, im thinkin the revs are under 3k at 65 ,,7a trans and 185-70 13 tires(so if anyone has a rev calculator),,i know i know,,i gotta get the tach in,,,,,wonderin if this is ok or normal, i thought even hyd 1.6 motors had a lil more than this,,,or maybe its a lil low cause i removed the vanes from the vacuum pump???i dont wanna blow upmy 4500$ engine
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#1 by QuickTD on 11 Feb, 2006 05:56
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Sounds perfectly normal. A 1.9TD has the same oiling system and mine has similar pressures to yours. 17-20 idling @900rpm, 35@2000rpm and 50@3000rpm. I use 5w40 syn, your pressures are a bit higher with 15w40 dino juice, but in the ballpark.
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#2 by hillfolk'r on 12 Feb, 2006 20:42
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cool,, i was a little worried,,,,,,after breakin i was gonna use a 5-40 delvac,,think thats ok???,imnot sure if the parts place also may have given me a wrong oilfilter,,,i just changed it(200miles),and got an oem from the dealer ,,it was just slightly smaller,thanthe one iremoved(i think the one sent me was a mahle,its still layin out in the garage,im gonna dissect it someday this week,,im gonna check its part number,,,,,after a lilride tonite,,,,i had almost 30at idle,,but then it wasnt fully warm,,,its cold here tonite,like 19 f ,,got spoiled all january,now we are payin,,oops im sorry, i saw you are in canada,,now i feel like a dummie complainin bout the cold,,did you guys have okweather till lately too??it was like 40s during day in jan.,,,,freakin crazy,,
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#3 by QuickTD on 13 Feb, 2006 04:19
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5w40 after break in should be fine. My oil pressure varies alot with outside and engine temperature, don't worry about it. After long interstate drives in the heat of summer you'll likely see pressures as low as 10-15psi at idle, but they come back up as the oil cools...
We've had the same crazy weather, I was outside painting machinery in January! We're also paying for it now.... -
#4 by bhtooefr on 13 Feb, 2006 06:46
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Quote
after breakin i was gonna use a 5-40 delvac,,think thats ok?
??
Yes, that's OK.
The preferred oil on the TDIClub for VE TDIs is Mobil 1 Truck & SUV 5W40. Delvac 1 5W40, John Deere's 5W40 diesel oil, and Caterpillar's 5W40 diesel oil are all the same thing. -
#5 by VentoTD on 07 Apr, 2006 14:05
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I'm fiddling with my vw vento (jetta3 called vento in europe). 1,9 td AAZ.
Just started it up yesterday after a mayor overhaul. Tuned it some. Installed a oil pressure gauge (never used one on this engine type before). I was chocked when oil pressure dropped to 16 psi at 600rpm idle after warmup. Man its ruined, I'll have to rebuild it again!
Removed oil pan and checked (plastic gaged) main crank bearing it was ok, checked oil pump, good as new. I found no trace of metals in oil or pan. So i guess it didn't take any damage.
Are you guys sure of that oil pressure? It sounds really low.
Using 15w40 oil, when I drained it it was fully warmed up and was thin (viscosity? word thing..) as water or milk. That didn't feel right either. But that same sort of oil have served me well for a few yrs.
If anyone's interested I have som pictures of this projekt:
http://200sx.kicks-ass.net/album/album.php?username=gasbjorn&cat=5443 -
#6 by QuickTD on 07 Apr, 2006 14:24
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Normal oil pressure (from bentley manual) is 2 bar (29psi) at 2000rpm with an oil temperature of 80ºC.
Your 16 psi at idle with the engine warm sounds normal to me. The cylinder head port will often give lower readings than the oil filter base port. The hydraulic lifters tend to bleed the pressure down. The pressure specified in the bentley manual is measured at the oil filter.
If it gets below 7-8 at idle and sets off the oil light I would suspect the intermediate shaft bearings, they are the most common cause of low oil pressure. -
#7 by hillfolk'r on 08 Apr, 2006 23:46
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ok,,im readin it in the head,,maybe ill try down on the filter pad,,,wasnt thinkin about that one,,,,,,,,, :roll