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Rebuilding the M54B30
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<blockquote data-quote="ess530i" data-source="post: 380025" data-attributes="member: 13496"><p>ok here's an update in case anyone is still interested in the topic. i received the parts from Top End performance on 15 sept (about 6-weeks upon order & payment). found out 2 piston rings were missing, notified them and they sent out the missing item the next day. later found out 2 other rings were abnormally sized, notified them and they sent out the 2 rings within 2 days. overall quite satisfied with Top End Performance's service... anyone interested in rebuilding their engine can consider contacting steve nelson who is one of the few experienced person dealing with bmw engine rebuilt parts...</p><p></p><p>ah wai took less than a week to put everything together... which is really fast but hope he got everything right and did most of it by himself (as claimed). for piston ring gap sizing, we followed the guideline provided by JE:</p><p></p><p>top ring - 0.005"</p><p>2nd ring - 0.0055"</p><p>oil ring - 0.020"</p><p></p><p>my concern was on oil ring gap... the min spec is 0.015", ah wai recommended 0.020" (within spec) but Top End mentioned that 0.025 - 0.031 is just fine. anyone got any idea about this? maybe i should have posted this earlier and find out more...</p><p></p><p>besides rebuilding the engine, i also installed an oil temp gauge n an auto-tranny cooler. wanted to do engine oil cooler but the JDM kit didn't fit. anyone who knows where i can get a BMW engine oil cooler kit? pls let me know...</p><p></p><p>got the car on monday and started the boring run-in process. 1st driving impression is that the car is smoother n has higher low end torque than b4 despite the lower compression. fuel economy is same as b4. the engine sounds a little louder than b4 not sure if its the SC or because newly rebuilt engine sounds louder? no difference or problem on cold-start but i allowed longer period for warming up as recommended. one thing i noticed in the morning is the rev limit indicator disappears faster than b4. is this an indication that the water temp is rising faster than b4?</p><p></p><p>one of my main concern now is the oil temp... the average is between 95 - 105 deg C under normal run-in driving (below 3k rpm,</p></blockquote><p></p>
[QUOTE="ess530i, post: 380025, member: 13496"] ok here's an update in case anyone is still interested in the topic. i received the parts from Top End performance on 15 sept (about 6-weeks upon order & payment). found out 2 piston rings were missing, notified them and they sent out the missing item the next day. later found out 2 other rings were abnormally sized, notified them and they sent out the 2 rings within 2 days. overall quite satisfied with Top End Performance's service... anyone interested in rebuilding their engine can consider contacting steve nelson who is one of the few experienced person dealing with bmw engine rebuilt parts... ah wai took less than a week to put everything together... which is really fast but hope he got everything right and did most of it by himself (as claimed). for piston ring gap sizing, we followed the guideline provided by JE: top ring - 0.005" 2nd ring - 0.0055" oil ring - 0.020" my concern was on oil ring gap... the min spec is 0.015", ah wai recommended 0.020" (within spec) but Top End mentioned that 0.025 - 0.031 is just fine. anyone got any idea about this? maybe i should have posted this earlier and find out more... besides rebuilding the engine, i also installed an oil temp gauge n an auto-tranny cooler. wanted to do engine oil cooler but the JDM kit didn't fit. anyone who knows where i can get a BMW engine oil cooler kit? pls let me know... got the car on monday and started the boring run-in process. 1st driving impression is that the car is smoother n has higher low end torque than b4 despite the lower compression. fuel economy is same as b4. the engine sounds a little louder than b4 not sure if its the SC or because newly rebuilt engine sounds louder? no difference or problem on cold-start but i allowed longer period for warming up as recommended. one thing i noticed in the morning is the rev limit indicator disappears faster than b4. is this an indication that the water temp is rising faster than b4? one of my main concern now is the oil temp... the average is between 95 - 105 deg C under normal run-in driving (below 3k rpm, [/QUOTE]
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