How hot is hot enough

kevinb21 · 06-06-2021, 05:40 AM

I have a 2010 N54 335i that lost an engine to a spun rod bearing at 130,000 miles. Ever since I changed its engine with a used one and while the engine was out I put in brand new king rod bearings in the used motor. The car is now almost complete (still some boost leaks) but given its new rod bearings and my fear of rod bearing failure again like in vehicle virals 335i spinning a rod bearing right after replacement the question comes up. How hot should my oil be before I drive it hard. I also have an n26 328i and I feel that 170 degree oil or right after the 160 mark on the dash means it's safe to go to high rpm driving. Is that true? I want to make sure I'm not causing premature failure on either Bmw I have especially with my n54's new rod bearings. I often floor it right after my temperature peg is above the 160 mark. Lmk if that's a safe practice or if It needs to be fully fully hot before I go, example. Tonight I floored it when the oil in my 335i was at 170 degrees after 6 miles of driving and the car is stage 2+, is that acceptable?

Saif2018 · 06-06-2021, 08:31 AM

Quote:

Originally Posted by kevinb21

I have a 2010 N54 335i that lost an engine to a spun rod bearing at 130,000 miles. Ever since I changed its engine with a used one and while the engine was out I put in brand new king rod bearings in the used motor. The car is now almost complete (still some boost leaks) but given its new rod bearings and my fear of rod bearing failure again like in vehicle virals 335i spinning a rod bearing right after replacement the question comes up. How hot should my oil be before I drive it hard. I also have an n26 328i and I feel that 170 degree oil or right after the 160 mark on the dash means it's safe to go to high rpm driving. Is that true? I want to make sure I'm not causing premature failure on either Bmw I have especially with my n54's new rod bearings. I often floor it right after my temperature peg is above the 160 mark. Lmk if that's a safe practice or if It needs to be fully fully hot before I go, example. Tonight I floored it when the oil in my 335i was at 170 degrees after 6 miles of driving and the car is stage 2+, is that acceptable?

I would wait till its 100 degrees C or about 200F before going hard on the throttle.

Dave92N54 · 06-06-2021, 09:12 AM

180F is what I wait til. It's proven 180-190F oil temp is ideal for power.

mweisdorfer · 06-06-2021, 09:37 AM

Most people would say a bare minimum would be 170. I personally wait to at least 190-200.

06-06-2021, 05:40 AM	#1
kevinb21 as long as it runs :) 50 Rep 172 Posts Drives: f30 328i/ e92 335i Join Date: Aug 2019 Location: orange county iTrader: (0)	I have a 2010 N54 335i that lost an engine to a spun rod bearing at 130,000 miles. Ever since I changed its engine with a used one and while the engine was out I put in brand new king rod bearings in the used motor. The car is now almost complete (still some boost leaks) but given its new rod bearings and my fear of rod bearing failure again like in vehicle virals 335i spinning a rod bearing right after replacement the question comes up. How hot should my oil be before I drive it hard. I also have an n26 328i and I feel that 170 degree oil or right after the 160 mark on the dash means it's safe to go to high rpm driving. Is that true? I want to make sure I'm not causing premature failure on either Bmw I have especially with my n54's new rod bearings. I often floor it right after my temperature peg is above the 160 mark. Lmk if that's a safe practice or if It needs to be fully fully hot before I go, example. Tonight I floored it when the oil in my 335i was at 170 degrees after 6 miles of driving and the car is stage 2+, is that acceptable?
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06-06-2021, 09:12 AM	#3
Dave92N54 Major 538 Rep 1,173 Posts Drives: 09 E92 335i 6MT Join Date: Nov 2020 Location: Westminster, Maryland iTrader: (0) Garage List 2009 BMW 335i [10.00]	180F is what I wait til. It's proven 180-190F oil temp is ideal for power. __________________ 09 E92 335i 6MT / Alpine White / Coral Red / VRSF 7.5" / VRSF DCI / VRSF Catless Downpipes / VTT Charge Pipe / Turbosmart RacePort Gen V / RB OEM Billet Turbos / CD919 Custom Tune / Bilstein PSS9s
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06-06-2021, 09:37 AM	#4
mweisdorfer Major General 1956 Rep 6,965 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	Most people would say a bare minimum would be 170. I personally wait to at least 190-200.
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