JMG Motorwerks

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JMG Motorwerks BMW Engine Rebuilding Service

N55 Performance Build Featuring a M235i / M2 Forged Crankshaft Assembly paired with VAC Motorsports Calico Coated Main a...
10/22/2026

N55 Performance Build Featuring a M235i / M2 Forged Crankshaft Assembly paired with VAC Motorsports Calico Coated Main and Rod Bearings with ARP Connecting Rod Bolts

09/17/2026
"Tear down Tuesday" - BMW M3 S65B40 Produced from 2007 to 2013 These particular engines are known for Rod Bearing failur...
09/15/2026

"Tear down Tuesday"
- BMW M3 S65B40 Produced from 2007 to 2013
These particular engines are known for Rod Bearing failures. Preventative rod bearing replacement was performed previously. Found spun # 1 Main bearing present and welded itself to the crankshaft. This is becoming a common issue due to excessive tension from timing chain design. We suggest to consider a full rebuild before catastrophic failure happens.

09/11/2026

BMW S55 upgrading to a VAC 4-Pin Crank Hub.
VAC Motorsports | BMW Performance Parts

09/05/2026

2016 BMW M4 S55 is here at JMG for the "Big 3"
We are also performing the inspection, alignment and bolt replacement of the exhaust cam ledge. Stay tuned!

08/09/2026

BMW N20 Crankshaft "Spins Like Butter" 🧈

Crankshaft Main Bearing Clearances verified by the best here at JMG Motorwerks!
08/09/2026

Crankshaft Main Bearing Clearances verified by the best here at JMG Motorwerks!

2013 BMW 335i production date 12/2012There are 3 different versions / combinations of the N55. Vehicle came to us with a...
08/03/2026

2013 BMW 335i production date 12/2012

There are 3 different versions / combinations of the N55.

Vehicle came to us with a rod knock.
During removal and inspection, found an "early version" N55 that was currently present instead. During tear down confirmed rod bearing failure.
Fun Fact: An attempt was made previously by installing another new set of rod bearings as seen in the pictures.
This customer is getting the JMG Treatment! This will be a Performance Build featuring a Forged M235i Crankshaft, VAC Coated Main and Rod Bearings with ARP Rod Bolts
Stay Tuned....

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Niceville, FL

Telephone

+19549075659

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