Spoolas | Engine conversion parts

Custom Conversion Parts

Helping You Build

We specialize in older model BMW engine conversions. Any classic BMW can be brought back to life with a modern powertrain, and we’re here to make that happen.

With extensive experience retrofitting E30s, E34s, and E36s, we’ve perfected the process to ensure your conversion goes as smoothly as possible. Our top-quality wiring looms and ECUs simplify the work and deliver reliable results.

Bring your older generation BMW back to the road—better, stronger, and ready for the future.

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Need More Power?

We have you covered

Check out our list of available upgrades

Swapping Your E36 With an M57?

Let us help you with that

Check out our P&P looms

Need a Standalone ECU?

Let us take care of the tuning

Check out our variety of standalone ECU's

Don't Know Where To Start?

Check Out Our Guide

M57 Swap Guide

Customer Favorites

M57 E34/E30/E36 Plug and Play Loom

M57 E34/E30/E36 Plug and Play Loom

Regular price From €199,99 EUR

Regular price Sale price From €199,99 EUR
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M57 standalone wiring loom

M57 standalone wiring loom

Regular price From €109,99 EUR

Regular price Sale price From €109,99 EUR
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Turn key ECU+Wiring loom kit for E30, E32, E34, E36

Turn key ECU+Wiring loom kit for E30, E32, E34, E36

Regular price From €350,99 EUR

Regular price Sale price From €350,99 EUR
Unit price per
M57N/M47N standalone wiring loom

M57N/M47N standalone wiring loom

Regular price From €189,99 EUR

Regular price Sale price From €189,99 EUR
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Worldwide shipping. Wherever you are, our looms will reach you.
All parts were developed and tested by us only to the highest standard. Daily driver or a drift car? We've got you covered.
We are always eager to help! Whether you have any questions about our parts or have any conversion related questions, do not hesitate to ask us.

Technical Insights

Tightening Torques

184/193Hp - 135/142KW

Component	Instructions	Torque Specification
Cylinder head instructions
Cylinder head	Renew bolts	Yes
	Tighten	40 Nm
	Tighten	80 Nm
	Slacken off	180°
	Tighten	50 Nm
	Tighten	90°
	Tighten	90°
Other engine tightening torques
Main bearings	Renew bolts/nuts	Yes
Main bearings - Stage 1	Tighten	20 Nm
Main bearings - Stage 2	Tighten	70°
Big end bearings	Renew bolts/nuts	Yes
Big end bearings - Stage 1	Tighten	15 Nm
Big end bearings - Stage 2	Tighten	20 Nm + 70°
Oil pump to cylinder block	Tighten	22 Nm
Sump bolts	Apply sealant	M6 8.8 = 10 Nm M6 10.9 = 12 Nm M8 = 22 Nm
Sump drain bolt	-	M12 = 35 Nm M22 = 60 Nm
Flywheel/driveplate	Tighten	105 Nm / 120 Nm
Clutch pressure plate	-	8.8 = 24 Nm 10.9 = 34 Nm
Crankshaft pulley/damper center bolt	Use new bolts and tighten in the following stages	40 Nm 60° 60°
Camshaft sprocket/gear	Tighten	20 Nm + 50°
Camshaft carrier/cap	-	M6 = 10 Nm M7 = 15 Nm M8 = 20 Nm
Camshaft/rocker cover	-	M6 = 10 Nm M7 = 15 Nm
Inlet manifold to cylinder head	-	M6 = 10 Nm M7 = 15 Nm M8 = 22 Nm
Exhaust manifold to cylinder head	-	M6 = 10 Nm M7 = 15 Nm
Injector/clamp	Tighten	10 Nm
Injector pipe unions	Tighten	25 Nm
Fuel/injection pump sprocket/gear	Tighten	65 Nm
Glow plugs	Tighten	18 Nm
Engine coolant temperature (ECT) sensor	Tighten	13 Nm
Engine oil pressure switch	Tighten	14 Nm

204/218Hp-150/160Kw

Component	Instructions	Torque Specification
Cylinder head instructions
Cylinder head	Renew bolts	Yes
	Tighten	40 Nm
	Tighten	80 Nm
	Slacken off	180°
	Tighten	50 Nm
	Tighten	90°
	Tighten	90°
Other engine tightening torques
Main bearings	Renew bolts/nuts
Main bearings - Stage 1	Tighten	Yes
Main bearings - Stage 2	Tighten	23 Nm
Big end bearings	Renew bolts/nuts	90°
Big end bearings - Stage 1	Tighten	Yes
Big end bearings - Stage 2	Tighten	5 Nm
Oil pump to cylinder block	Tighten	20 Nm + 70°
Sump bolts	Apply sealant	23 Nm
Sump drain bolt	-	M6 8.8 = 10 Nm M6 10.9 = 12 Nm M8 = 22 Nm
Flywheel/driveplate	Tighten	M12 = 5 Nm M18 = 35 Nm M22 = 60 Nm
Clutch pressure plate	-	105 Nm / 120 Nm
Crankshaft pulley/damper center bolt	Use new bolts and tighten in the following stages	8.8 = 24 Nm 10.9 = 34 Nm
Camshaft sprocket/gear	Tighten	40 Nm 60° 60°
Camshaft carrier/cap	-	20 Nm + 50°
Camshaft/rocker cover	-	M6 = 10 Nm M7 = 15 Nm M8 = 20 Nm
Inlet manifold to cylinder head	-	M6 = 10 Nm M7 = 15 Nm
Exhaust manifold to cylinder head	-	M6 = 10 Nm M7 = 15 Nm M8 = 22 Nm
Injector/clamp	Tighten	M6 = 10 Nm M7 = 15 Nm M8 = 22 Nm
Injector pipe unions	Tighten	9 Nm
Fuel/injection pump sprocket/gear	Tighten	23 Nm
Glow plugs	Tighten	65 Nm
Engine coolant temperature (ECT) sensor	Tighten	18 Nm
Engine oil pressure switch	Tighten	13 Nm

231/235Hp - 170-173Kw

Component	Instructions	Torque Specification
Cylinder head instructions
Cylinder head	Renew bolts	Yes
	Tighten	40 Nm
	Tighten	80 Nm
	Slacken off	180°
	Tighten	50 Nm
	Tighten	90°
	Tighten	90°
Other engine tightening torques
Main bearings	Renew bolts/nuts	Yes
Main bearings - Stage 1	Tighten	50 Nm
Main bearings - Stage 2	Tighten	90°
Big end bearings	Renew bolts/nuts	Yes
Big end bearings - Stage 1	Tighten	10 Nm
Big end bearings - Stage 2	Tighten	20 Nm + 70°
Oil pump to cylinder block	Tighten	23 Nm
Sump bolts		M6: 8 Nm, M8 x 30 mm: 19 Nm, M8 x 50 mm: 19 Nm
Sump drain bolt		M12: 25 Nm, M18: 35 Nm, M22: 60 Nm
Flywheel/driveplate	Tighten	120 Nm / 121 Nm
Clutch pressure plate		M8 8.8: 25 Nm, M8 10.9: 34 Nm, M8 10.9 ZNS: 15 Nm + 90° ±5°
Crankshaft pulley/damper centre bolt	Tighten	40 Nm + 60° + 60°
Camshaft sprocket/gear	Tighten	14 Nm
Camshaft carrier/cap		M6: 10 Nm, M7: 15 Nm, M8: 20 Nm
Camshaft/rocker cover	Tighten	15 Nm, M6: 10 Nm
Inlet manifold to cylinder head		M6: 10 Nm, M7: 15 Nm, M8: 22 Nm
Exhaust manifold to cylinder head	Tighten	20 Nm
Water pump	Tighten	13 Nm
Injector/clamp	Tighten	9 Nm
Injector pipe unions	Tighten	23 Nm
Fuel/injection pump sprocket/gear	Tighten	65 Nm
Fuel/injection pump mounting	Tighten	12 Nm
Glow plugs	Tighten	13 Nm
Engine coolant temperature (ECT) sensor	Tighten	13 Nm
Knock sensor (KS)	Tighten	20 Nm
Engine oil pressure switch	Tighten	27 Nm
Oil filter	Tighten	25 Nm

272Hp - 200Kw

Component	Instructions	Torque Specification
Cylinder head instructions
Cylinder head	Renew bolts	Yes
	Tighten	40 Nm
	Tighten	80 Nm
	Slacken off	180°
	Tighten	50 Nm
	Tighten	90°
	Tighten	90°
Other engine tightening torques
Main bearings	Renew bolts/nuts	Yes
Main bearings - Stage 1	Tighten	23 Nm
Main bearings - Stage 2	Tighten	90°
Big end bearings	Renew bolts/nuts	Yes
Big end bearings - Stage 1	Tighten	15 Nm
Big end bearings - Stage 2	Tighten	20 Nm + 70°
Oil pump to cylinder block	Tighten	23 Nm
Sump bolts		M6: 8 Nm, M8 x 30 mm: 19 Nm, M8 x 50 mm: 19 Nm
Sump drain bolt	Tighten	25 Nm
Flywheel/driveplate	Tighten	120 Nm / 121 Nm
Clutch pressure plate		8.8: 24 Nm, 10.9: 34 Nm
Crankshaft pulley/damper centre bolt	Tighten	40 Nm + 60° + 60°
Camshaft sprocket/gear	Tighten	14 Nm
Camshaft carrier/cap		M6: 10 Nm, M7: 15 Nm, M8: 20 Nm
Camshaft/rocker cover		M6: 10 Nm, M7: 15 Nm
Inlet manifold to cylinder head		M6: 10 Nm, M7: 15 Nm, M8: 22 Nm
Exhaust manifold to cylinder head	Tighten	20 Nm
Water pump
Injector/clamp	Tighten	9 Nm
Injector pipe unions	Tighten	23 Nm
Fuel/injection pump sprocket/gear	Tighten	65 Nm
Fuel/injection pump mounting	Tighten	12 Nm
Glow plugs	Tighten	13 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	Tighten	10 Nm
Camshaft position (CMP) sensor	Tighten	10 Nm
Engine coolant temperature (ECT) sensor	Tighten	20 Nm
Knock sensor (KS)	Tighten	20 Nm
Engine oil pressure switch	Tighten	27 Nm
Oil filter	Tighten	25 Nm

286Hp - 210Kw

Component	Instructions	Torque Specification
Cylinder head instructions
Cylinder head	Renew bolts	Yes
	Tighten	40 Nm
	Tighten	80 Nm
	Slacken off	180°
	Tighten	50 Nm
	Tighten	90°
	Tighten	90°
Other engine tightening torques
Main bearings	Renew bolts/nuts	Yes
Main bearings - Stage 1	Tighten	50 Nm
Main bearings - Stage 2	Tighten	90°
Big end bearings	Renew bolts/nuts	Yes
Big end bearings - Stage 1	Tighten	10 Nm
Big end bearings - Stage 2	Tighten	20 Nm + 70°
Oil pump to cylinder block	Tighten	23 Nm
Sump bolts	Tighten	-
Sump drain bolt	Tighten	25 Nm
Flywheel/driveplate	Tighten	120 Nm / 121 Nm
Clutch pressure plate	Tighten	-
Crankshaft pulley/damper bolts	Tighten	40 Nm + 120°
Camshaft sprocket/gear	Tighten	14 Nm
Camshaft carrier/cap	Tighten	-
Camshaft/rocker cover	Tighten	15 Nm, M6: 10 Nm
Inlet manifold to cylinder head	Tighten	-
Exhaust manifold to cylinder head	Tighten	20 Nm
Water pump	Tighten	13 Nm
Injector/clamp	Tighten	9 Nm
Injector pipe unions	Tighten	23 Nm
Fuel/injection pump sprocket/gear	Tighten	65 Nm
Fuel/injection pump mounting	Tighten	12 Nm
Glow plugs	Tighten	13 Nm
Crankshaft position (CKP) sensor/engine speed (RPM) sensor	Tighten	10 Nm
Camshaft position (CMP) sensor	Tighten	3 Nm
Engine coolant temperature (ECT) sensor	Tighten	20 Nm
Knock sensor (KS)	Tighten	20 Nm
Engine oil pressure switch	Tighten	27 Nm
Oil filter	Tighten	25 Nm

Tuning

Before you decide on a remap, you should understand a few key things:

Engine Health: The current condition of your engine is crucial. Tuning can push your engine to perform at a higher level, which may reveal any existing weaknesses. It’s important to ensure that your engine is in good health before proceeding with a remap.
Impact on Components: Tuning can place additional stress on various engine components, such as the turbocharger, injectors, and gearbox. If any of these parts are already compromised, tuning could exacerbate the issue, leading to potential failures.
Compatibility with Modifications: If you’ve made or are planning to make significant modifications to your vehicle, such as upgrading to a larger turbocharger or replacing injectors, these changes must be properly accounted for in the remap to optimize performance and ensure reliability.
Long-Term Effects: While a remap can enhance power and torque, it's important to consider the long-term effects on your vehicle’s engine and overall longevity. Regular maintenance and monitoring are essential to maintaining reliability after tuning.
Warranty Considerations: Tuning your vehicle may affect any existing warranties. It's advisable to check with your manufacturer or dealership about how a remap could impact your warranty coverage.
Professional Expertise: Choosing an experienced and reputable tuner is vital. The quality of the remap depends on the tuner’s expertise, the equipment used, and their understanding of your specific engine and vehicle.

Understanding these factors will help you make an informed decision about whether a remap is the right choice for your vehicle.

184-193 Hp

Stock: Stage 1- 230Hp/480NM

Stage 2- 240Hp/530NM

Modified: 310Hp ( requires significant modifications: CP3 R90 Fuel system retrofit, M57N2 turbo, exhaust manifold, intake pipe, 4 bar map sensor, bigger intercooler and downpipe)

204-218hp

Stage 1: 260-270hp/550Nm
Stage 2: 300hp (218hp Euro 4)/600Nm. Requires 3'' downpipe and a bigger intercooler.

Additional power can be achieved with a hybrid turbo and injector upgrades.

231hp-235hp

Stage 1: 300hp/650Nm. Requires 3'' downpipe and a bigger intercooler.

Further power increases are possible with a hybrid turbo and an upgrade to the CP3 R90 fuel pump.

197hp

Stage 1: 260hp/550Nm

More power can be achieved with injector upgrades.

272hp

Stage 1: 360hp/700Nm.Requires 3'' downpipe and a bigger intercooler.

286hp

Stage : 370hp/730Nm. Requires 3'' downpipe and a bigger intercooler.

Transmissions

Manual Transmissions:

184-193-204Hp M57

GS-37DZ (E46 320d, 6-speed)

Recommended for good performance and reliability.

GS6-53DZ (E46 330d, 6-speed)

Another excellent option for manual transmission with solid gear ratios.

S5D TDS Transmission (E39, E34, E36, E38)

Not recommended due to short gear ratios, which can negatively impact driving comfort and highway performance.

GS5 M57 Transmission (E39, E46)

It is not advised due to gear ratios being even shorter than S5D, but it could work if the differential is replaced with 2.28/2.35.

Automatic Transmission:

8HP70

Highly recommended for smooth shifting, durability, and modern performance.

218-231-272-282Hp

All of these use the same bellhousing. Therefore, you can use any 6 speed transmission that came in diesel E6x, E9x. S5D, GS5, GS6 transmissions mentioned above, will not fit the bell housing!