Another engine build

Jern54

Corporal
Oct 18, 2019
123
58
0
Netherlands
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E91 N54 335i
Hello,

After pushing the stock engine with Chinesium 17T at 27psi on E80 mixes for several months, the engine suffered compression loss on cyl 4 (79psi)

The engine is completely taken apart at the moment.

I will update this tread once in a while when I have some new content coming up.

Cheers

Mods:

JE Ultra Series 9.5:1 pistons 84.00mm
Dry Ductile Iron Sleeves
FCP H-beam connecting rods
Hydra HP800 turbo's
N53 intake camshaft
VTT spline lock crank hub
VTT crank bolt capture
BMP stock location PI manifold
Stage 3 LPFP (duo Walbro 450)
Upgraded LP fuel line
Motiv Flex Fuel
Inline fuel filter in front of HPFP
 
Last edited:

Jern54

Corporal
Oct 18, 2019
123
58
0
Netherlands
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E91 N54 335i
Broken ringlands on piston #4
 

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Jern54

Corporal
Oct 18, 2019
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58
0
Netherlands
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E91 N54 335i
Very strange wear pattern on the big end bearing of unit #5.
Did anyone see this before?
Blackstone oil analysis were all fine.
 

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Jern54

Corporal
Oct 18, 2019
123
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0
Netherlands
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E91 N54 335i
Last sample was sent 5000 miles (5 months) ago.
IMO the damage pattern is a result of prolonged wear but that's just a guess.
 

derekgates

Lieutenant
Feb 23, 2018
699
334
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NW FL
derekgates.us
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2011 335is
Last sample was sent 5000 miles (5 months) ago.
IMO the damage pattern is a result of prolonged wear but that's just a guess.

hmm, they normally catch things like this. Could have been an extremely slow process of degradation.

At least you send your samples in. I have 10 bottles full, like a freaking idiot. At least I can say "I can't believe they didn't catch the problem!" :p
 

Jern54

Corporal
Oct 18, 2019
123
58
0
Netherlands
Ride
E91 N54 335i
So the block is finally being machined at the shop for some new ductile iron Sleeves from Westwood cylinder liners. Hopefully I can pick up de block one of these days so we can start to build it back together.
 

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SlowE93

Lieutenant
Jul 2, 2017
649
227
0
Ride
E93
Hello,

After pushing the stock engine with Chinesium 17T at 27psi on E80 mixes for several months, the engine suffered compression loss on cyl 4 (79psi)

The engine is completely taken apart at the moment.

I will update this tread once in a while when I have some new content coming up.

Cheers

Mods:

JE Ultra Series 9.5:1 pistons 84.00mm
Ductile Iron Sleeves
FCP H-beam connecting rods
Hydra HP800 turbo's
VTT spline lock crank hub
VTT crank bolt capture
BMP stock location PI manifold
Stage 3 LPFP (duo Walbro 450)
Upgraded LP fuel line
Inline fuel filter in front of HPFP
Do you know what actually caused the ringland failure ?
Timing too aggressive ?
Afr too lean ?
 

Jern54

Corporal
Oct 18, 2019
123
58
0
Netherlands
Ride
E91 N54 335i
Do you know what actually caused the ringland failure ?
Timing too aggressive ?
Afr too lean ?
27psi on 17T chinesiums on a 200k miles engine with 14 degrees of timing.
The ringlands of the cast pistons are a weak spot at that power level.