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Running temps water/oil B5 1.8t

Discussion in 'A4/S4 forum(B5 Chassis)' started by Darknights, Dec 24, 2013.

  1. Darknights
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    Darknights New Member

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    Hi guys, just wondering what the normal correct warmed up running temps should be for my 2001 Audi A4 avant 1.8t? The oil/water gauges hardly seem to move off the 60 mark? Also the MPG seems a bit low? Wondering if temp sensors are shot causing engine to think ya always cold and over fuel?

    It's a 1.8t running an MRC stage 1 remap at supposedly 203bhp? The most MPG I can seem to get if I drive like a total granny and totally off boost is 24.8, Seems a tad low?....
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  2. mojocvh
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    mojocvh Member

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    Well at least you have the oil and water temps in sync!
    Now, I'm no expert but how quickly does it warm up?? does it have a thermostat stuck open 100% [fail safe at least]???
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  3. Darknights
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    Darknights New Member

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    That's the thing, I'm never really sure it has warmed up as gauges barely move. My stat is stuck?... Might invest in a new one after Xmas and maybe temp sensors.
    Any ideas what a general MPG should be on a B5 A4? Kinda thought I could get more like 30 if I drove like an OAP ;-) lol

    Seems to cost loads to run in petrol, though my other motor is a mk4 TDI PD115 estate ;-)
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  4. B5NUT
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    B5NUT Well-Known Member

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    I would say a bad stat, your temp water temp should be bang on 90 and the oil should be about the same, but I see a slight rise in the oil temp when driven at speed.
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  5. Darknights
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    Darknights New Member

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    Cool. I'll do the stat and the coolant at the same time as that's fairly crappy. Time to do a flush out and order some G13 me thinks ;-)
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  6. B5NUT
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    B5NUT Well-Known Member

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    I flushed mine coolant a few times, filled it up with just water drove it around a couple of miles (before the temp started to rise) and dropped it, did that a few times then filled up with G13. I also replaced the expansion tank and cap when I refiled with G13.
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  7. Darknights
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    Darknights New Member

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    Cool. Just ordered expansion tank, thermostat, seal & G13. Hope I can find time to do it all ;-)
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  8. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Best time to replace a stat snd get that cabin really toasty :) !!!
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  9. Iceash
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    Iceash Member

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    Water, 90 on dash, oil between 80 to 90 takes bout 10 miles to warm oil up to temp
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  10. Darknights
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    Darknights New Member

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    Hmmm, mines Deffo not reading right ;-)
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  11. matt66604
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    matt66604 Member

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    My coolant temp is around 90 and oil sits between 70-90 and when I drive normally I get around 30mpg and fuel saving mode is around 30-40.. On a good day...
    #11
  12. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    90 / 90 here, it will affect MPG if the engine is running too cool, as will tired MAF's and 02 senders
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  13. Topplumb1
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    Topplumb1 Member

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    My coolant temp is 90 and oil temp is 80 - thats after both a new oil pump and coolant pump fitted new oil and the larger oil filter, takes a while for the oil temp to get up in winter, cam chain tensioner is also new, and power steering pump too !!
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  14. Darknights
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    Darknights New Member

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    Hmm, 30-40 mpg. Most ive managed is 24.8 so I'm thinking some is definitely not right. My corrado g60 used to get more MPG than my b5 :-( I love it but it's costing a lot to run. Gonna run my code reader over it 2mrw and see what it picks up
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  15. Chriscooke
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    Chriscooke Clueless!

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    Mine also sits bang on 90 for both oil and water. The best I've had for a decent trip (150 miles'ish) is 32mpg but have achieved 36mpg on a shorter trip once according to the display.

    Edit: Mine starts warming up and the water gauge moving after approx 3 miles.
    #15

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