Lot 2899-DFW: 1986 BMW 635CSi
Last Asking
$29,000
info
Mar 30, 2026
VIN: WBAEC7407G0607567
- 112k mi
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Location: Grapevine, Texas, USA
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Originality: Original & Highly Originalinfo
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Transmission: Manual
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Handedness: LHD
- There are 2 BMW 635CSi - Manual - E24 (1978 to 1989) for sale right now.
Vehicle Details
Anon
“What are the common issues with the M30 engine in this model?”
The M30 engine in the 1986 BMW 635CSi (E24) is reliable but has known issues:
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Oil Consumption
- Common due to worn piston rings/valve seals. Your vehicle had recent oil changes (March 2025) but high mileage (112k+ miles) increases risk.
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Timing Chain/Tensioner Wear
- Stretching/failure can cause misfires. No recent work noted; listen for rhythmic “ticking”.
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Cooling System Vulnerabilities
- Weak water pumps/thermostats. Coolant hose replaced (March 2022) is good, but inspect other components.
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Main Bearing Wear
- Knocking noises at startup may indicate wear. High mileage increases risk.
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Fuel Delivery Issues
- Degraded injectors/pump. No recent work noted; test if power loss occurs.
Recommendations: Regular maintenance, monitor for symptoms, and refer to Bimmerforums E24 Thread and M30 Engine Review for deeper insights.