BMW M52 Torque Specs: E36, E39 & Z3 Reference

BMW

Oct 21

The BMW M52 is found in the E36, early E39 and Z3, but the engine's tightening specifications should not be reduced to a single universal chart. BMW distinguishes cast-iron-block and aluminum-block M52 cylinder-head procedures, and the later double-VANOS M52TU is a separate application.

Scope: This reference covers the single-VANOS BMW M52 in E36, early E39 and Z3 engine service. It excludes the M52TU, M54 and S52. Match the engine, block material, installed hardware and complete BMW procedure before using any value.

Technical disclaimer: Department69 cross-references BMW TIS-derived information as an independent DIY reference, not as a substitute for BMW's complete repair instructions. Verify engine version, block material, thread size, bolt grade, lubrication, fastener-replacement requirements and tightening sequence. Do not use a value if the component or hardware differs from the cited application. Work on your vehicle at your own risk.

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BMW M52 torque specifications: quick reference

Component	Torque	Application and source
Cylinder-head bolts, M10	30 Nm / 22.1 ft-lb + 90° + 90°	Cast-iron-block M52 only; new bolts, washed and oiled; BMW source
Cylinder-head bolts, M10	40 Nm / 29.5 ft-lb + 90° + 90°	Aluminum-block M52 only; new bolts, washed and oiled; BMW source
Cylinder-head cover, M6	10 Nm / 88.5 in-lb	Match installed M6 hardware; BMW source
Cylinder-head cover, M7	15 Nm / 11.1 ft-lb	Match installed M7 hardware; BMW source
Intake manifold to head, M8	22 Nm / 16.2 ft-lb	Match M8 hardware; BMW source
Intake manifold to head, M7	15 Nm / 11.1 ft-lb	Match M7 hardware; BMW source
Intake manifold to head, M6	10 Nm / 88.5 in-lb	Match M6 hardware; BMW source
VANOS solenoid valve to housing	30 Nm / 22.1 ft-lb	Single-VANOS M52; BMW source
VANOS banjo bolt, M14x1.5	32 Nm / 23.6 ft-lb	Single-VANOS M52; BMW source
VANOS screw plug, M22x1.5	50 Nm / 36.9 ft-lb	Single-VANOS M52; BMW source
VANOS hydraulic line to oil-filter carrier	32 Nm / 23.6 ft-lb	Single-VANOS M52; BMW source
Oil drain plug, M12x1.5	25 Nm / 18.4 ft-lb	Only for the identified M12x1.5 plug; BMW source
Oil pan to block, M6 grade 8.8	10 Nm / 88.5 in-lb	Confirm size and grade; BMW source
Oil pan to block, M6 grade 10.9	12 Nm / 106.2 in-lb	Confirm size and grade; BMW source

M52 cylinder-head bolts: iron versus aluminum block

For the cast-iron-block M52, BMW specifies 30 Nm / 22.1 ft-lb + 90° + 90° for the M10 cylinder-head bolts. For an aluminum-block M52, the procedure is 40 Nm / 29.5 ft-lb + 90° + 90°. Both require replacement bolts that are washed and oiled. BMW cylinder-head torque table.

The full head procedure additionally distinguishes M10x95 bolts for cast-iron blocks and M10x110 bolts for aluminum blocks, and warns against oil remaining in the tapped holes. Follow the BMW tightening order, not just the values in a chart. BMW cylinder-head repair procedure.

M52 valve-cover torque and resealing

BMW lists 10 Nm / 88.5 in-lb for M6 cover fasteners and 15 Nm / 11.1 ft-lb for M7. Identify the hardware before selecting a value. BMW cylinder-head-cover torque table.

For resealing, BMW instructs installers to clean the mating surfaces, correctly seat the gasket and tighten the cap nuts crosswise from the inside outward. BMW valve-cover repair procedure. A related parts option is the Genuine BMW single-VANOS M52 valve-cover gasket set. Confirm the product's fitment selector and your exact vehicle before ordering.

M52 intake-manifold torque

The M52 tightening table separates intake-manifold-to-head hardware by diameter: M8 at 22 Nm / 16.2 ft-lb, M7 at 15 Nm / 11.1 ft-lb and M6 at 10 Nm / 88.5 in-lb. Do not assume all manifold fasteners are the same size. BMW intake-manifold tightening table.

M52 single-VANOS tightening specifications

BMW explicitly lists M52 for the solenoid valve to VANOS housing at 30 Nm / 22.1 ft-lb; the M14x1.5 banjo bolt at 32 Nm / 23.6 ft-lb; the M22x1.5 screw plug at 50 Nm / 36.9 ft-lb; and the hydraulic line at the oil-filter carrier at 32 Nm / 23.6 ft-lb. BMW variable-camshaft-control tightening table.

The same BMW table includes a left-hand-thread M6 hydraulic-piston fastener, but its application row names M52TU/M54/M56, not the single-VANOS M52. That specification is intentionally excluded here. When removing the VANOS unit, consider the Genuine BMW M52 VANOS sealing gasket, but confirm product fitment for your exact M52 before purchasing.

M52 oil-pan and drain-plug hardware

BMW's M52 oil-pan table separates drain plugs by size. For an identified M12x1.5 drain plug, it lists 25 Nm / 18.4 ft-lb. For pan-to-block M6 hardware, it lists 10 Nm / 88.5 in-lb for grade 8.8 and 12 Nm / 106.2 in-lb for grade 10.9. Identify the actual fastener size and grade before tightening. BMW M52 oil-pan torque table.

BMW's oil-service instructions include the M52 and require replacing sealing components during service. BMW M52-inclusive engine-oil service procedure.

Why other specifications are omitted

This is not a universal BMW six-cylinder chart. It does not apply M52TU double-VANOS hardware to the single-VANOS M52, or assume flywheel, spark-plug or other torque figures without a sufficiently clear application-specific reader-facing source. A plausible value is not enough.

Frequently asked questions

What is the M52 head-bolt torque?

For a cast-iron block, 30 Nm / 22.1 ft-lb + 90° + 90°. For an aluminum block, 40 Nm / 29.5 ft-lb + 90° + 90°. New, washed and oiled bolts are required; follow the BMW tightening order and identify the block material first. Source.

What is the M52 valve-cover torque?

10 Nm / 88.5 in-lb for M6 and 15 Nm / 11.1 ft-lb for M7. Match the actual fastener. Source.

What is the M52 intake-manifold torque?

22 Nm / 16.2 ft-lb for M8, 15 Nm / 11.1 ft-lb for M7 and 10 Nm / 88.5 in-lb for M6. Source.

What is the M52 VANOS solenoid torque?

The solenoid valve to VANOS housing is 30 Nm / 22.1 ft-lb. Source.

Does this article cover the M52TU?

No. This article is for the single-VANOS M52. The M52TU has different VANOS hardware and requires its own procedures.

References

Final reminder: Torque charts do not replace complete repair instructions. Confirm exact application, hardware, fastener replacement and tightening order before work.

Justin Gabriel