Volume 2 — BMW · Newest

BMW E30 325i Field Manual

M20 · 1988–1990
Every value traced to a page in BMW factory data, Bentley or Haynes. None from forums.

108 pages. 18 sections. 15 figures. Symptom first, then the test that proves it, then the value to set.

BMW E30 325i Field Manual cover
108
Pages
15
Figures
18
Sections
M20
325i · 1988–1990
Contents

What's Inside

Four parts, 18 sections, from the first symptom to the pre-purchase check.

Part I
Owner's Quick Diagnostic Guide
  • 1. Overheating Diagnosis
  • 2. Rough Idle / Stalling
  • 3. Hard Starting / No Start
  • 4. Misfires & Low Power
  • 5. Poor Fuel Economy
  • 6. Exhaust Smoke
Part II
System Repair Guides
  • 7. Cooling System Repair
  • 8. Fuel System (Motronic)
  • 9. Driveline
Part III
Maintenance & Service
  • 10. Ignition Service
  • 11. Valve Cover Service
  • 12. Routine Intervals
  • 13. Master Torque Table
  • 14. Tools You Actually Need
  • 15. Fuse Panel & Relay Reference
Part IV
Heritage Wrench Exclusives
  • 16. Roadside & Safety
  • 17. Mick's Corrections
  • 18. Pre-Purchase Checklist
From the book

Sample Figures

Three of the manual's 15 figures, as they appear in the book.

Fig 8.2: Reading fault codes: 325i (Motronic 1.1)
Fig 8.2Reading fault codes: 325i (Motronic 1.1)
Fig 1.1: M20 cooling circuit
Fig 1.1M20 cooling circuit
Fig 9.1: Flex disc and centre support bearing
Fig 9.1Flex disc and centre support bearing
Sources

Where the Values Come From

Every value traced to a page in BMW factory data, Bentley or Haynes. None from forums.

BMW factory information: BMW E30 factory repair manual, and BMW TIS tightening torques. Bentley: BMW 3 Series (E30) Service Manual 1984–1990. Haynes: BMW 3- & 5-Series 1983–91, UK edition.

Where sources disagree, BMW's factory figure governs. Where nothing in hand covers a point, the book says so instead of guessing.

Field Knowledge

Mick's Tips

Two of the tips printed in the book.

Fan nut

Undo the fan nut clockwise, looking from the front of the car. Turn it the usual way and you only tighten it.

Code 3

Code 3? Check the wiring before you buy a sensor: a failure is usually a loose or shorted wire.

Volume 2

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