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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > N54 Confusing Missfire



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      04-10-2021, 04:55 PM   #23
kevinb21
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Quote:
Originally Posted by Saif2018 View Post
Pretty sure VehicularDIY mention that he did some hard pulls whilst the engine was cold.

Doing pulls whilst engine is not warmed up or cold is asking for a disaster to happen.
not to mention his car has upgraded turbos and is heavily tuned and the engine itself and main crank to block bearings and oil pump had 200k miles, with all of that I guess if he just slapped in new rod bearings and without giving the engine a chance to even warm up did some full sends on it, yea. that would do the trick and send those rod bearings to spin. That and he said he was brake boosting when it spun, imagine brake boosting a tuned cold engine.. yikes
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      04-10-2021, 05:28 PM   #24
Saif2018
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Originally Posted by kevinb21 View Post
not to mention his car has upgraded turbos and is heavily tuned and the engine itself and main crank to block bearings and oil pump had 200k miles, with all of that I guess if he just slapped in new rod bearings and without giving the engine a chance to even warm up did some full sends on it, yea. that would do the trick and send those rod bearings to spin. That and he said he was brake boosting when it spun, imagine brake boosting a tuned cold engine.. yikes
Exactly. Not surprising what happened.

A lot of rod bearing issues probably caused by owners sending it whilst the engine hasn't warmed up.
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