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kenny 523se 
Newbie
Joined: 12-June-2004
Location: United Kingdom
Status: Offline
Points: 8
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 Topic: m52
Posted: 08-August-2004 at 08:11 |
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hi can any body tell me what the difference is between the m52 engine and the m52 tu engine
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b8alk
Banned User
Andy K
Joined: 15-May-2004
Location: United Kingdom
Status: Offline
Points: 874
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Posted: 08-August-2004 at 11:02 |
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hi kenny all i can tell you is that the m52 relates to the 2.0/ 2.5/2.8 engines all of which are 24 v as for a m52tu??? i have never heard of one but perhaps some one else may be able to help you as there are alot of knowledgable people on this site.
Edited by b8alk
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e34m5
Really Senior Member II
Joined: 26-June-2003
Location: Near Rugby, Warwickshire
Status: Offline
Points: 1344
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Posted: 08-August-2004 at 12:35 |
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The M52 is Single Vanos and the M52TU is Double Vanos, the M52/M52TU engines were fitted to later E36 models, the E38 728 and E39's.
Miles
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b8alk
Banned User
Andy K
Joined: 15-May-2004
Location: United Kingdom
Status: Offline
Points: 874
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Posted: 08-August-2004 at 13:24 |
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SO WHAT DOES TU STAND FOR?
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e34m5
Really Senior Member II
Joined: 26-June-2003
Location: Near Rugby, Warwickshire
Status: Offline
Points: 1344
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Posted: 08-August-2004 at 18:05 |
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Technical Update or the German equivalent I think ?
Miles
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b8alk
Banned User
Andy K
Joined: 15-May-2004
Location: United Kingdom
Status: Offline
Points: 874
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Posted: 08-August-2004 at 19:02 |
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kenny 523se
Newbie
Joined: 12-June-2004
Location: United Kingdom
Status: Offline
Points: 8
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Posted: 13-August-2004 at 17:00 |
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thankyou to all that sorted that out for me
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dave 328
Really Senior Member II
Joined: 21-October-2003
Location: United Kingdom
Status: Offline
Points: 835
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Posted: 13-August-2004 at 17:28 |
How do you know if it is a TU double vanos or single as specs don't show any differences in power outputs. The only difference I've found is the later 328s (Got a 97 328 sport and 99 Z3 2.8) is the peak torque is 500rpm lower, surely double vanos would make more power rather than just reducing the peak torque engine speed.
Was it in 99 when it went to TU as the Z3 has square shaped inlet branches and a more round chain cover - looks basically like the 330 engine.
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328 Coupe Sport, Digital climate, full leather, OBD computer, De-restricted with M50 manifold, big bore throttle, chippeduk remap, custom cold cone intake and X-brace
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Dergside
Really Senior Member II
Joined: 16-May-2004
Location: Mid West, Ireland
Status: Offline
Points: 4000
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Posted: 13-August-2004 at 17:50 |
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Maybe I'm over simplifying it, but is the TU not just the update from Nikasil to Steel liners that occurred from week 10 production of '98?
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Now: BMW 523i SE '00, 318i SE - e91 '07, 325i Coupe '93.
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alpina527
Groupie
Joined: 01-April-2004
Status: Offline
Points: 68
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Posted: 13-August-2004 at 22:08 |
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Correct. The TU means that it is a non Nikasil block. All the dual Vanos engines have steel liners, so they are all TU.
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Dergside
Really Senior Member II
Joined: 16-May-2004
Location: Mid West, Ireland
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Posted: 13-August-2004 at 23:55 |
Didn't realize that there was also a change to dual Vanos at the same time as the block change. Always assumed that that change didn't happen until the M54, since there was no power difference between M52 and M52TU engines.
Is there a visual clue with the M52 then to indicate if it is an M52 or TU? Also, if M52 engines have been replaced due to Nikasil, did the replacements continue with the single Vanos or were they updated to dual? Lastly, are there any known issues with the dual Vanos in these similar to those on the e36 M3 Evo?
Sorry for all the questions, but I thought I knew my M52's from my M54's!
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Now: BMW 523i SE '00, 318i SE - e91 '07, 325i Coupe '93.
Prev:
e46 328i SE Touring, 330Ci, 318Ci.
e39 523i SE.
e36 325i Coupe *2, 323i SE, 316iSE.
e30 325iSE 2dr, 320i Conv, 320i 2dr, 316i.
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m52
