“What are the most common problems with the 1987 Land Rover Defender 90 and how can I fix them?”
Hey there! Great question about the ‘87 Defender 90 - these are legendary trucks but they definitely have their quirks. Let me break down the most common issues and how to fix them:
What happens: Water gets trapped behind the dash and door seals, rotting the firewall from the inside out. You’ll see it first in the footwells and A-pillars. The fix: YRM Metals makes excellent repair panels (about $200-400 for panel sets). Cut out the cancer, weld in new metal, and seal everything with Waxoyl. Budget $800-1500 if you’re paying someone to do it.
What happens: The 68hp 2.5 NA has weak points - injector pumps leak, timing belts snap, and copper washer failures cause compression loss. The fix:
What happens: Weak synchros, especially 2nd gear, plus bearing failures. You’ll get grinding shifts and eventually no 2nd gear. The fix: Ashcroft Transmissions master rebuild kit runs about $640. With labor, budget $1200-1800 for a full rebuild. Worth it - these gearboxes can be made bulletproof.
What happens: The steel frame rots from inside out, especially rear crossmember and outriggers. The fix: Regular Waxoyl treatments prevent it. If caught early, weld in repair sections. Severe cases need full chassis replacement ($2000-4000).
What happens: Bad grounds, corroded connections, failing switches - typical British car electrics. The fix: Complete rewire with modern fuse box ($500-800), or just clean and dielectric-grease every connection you can find.
The ‘87 Defender 90 you’re looking at has already had some key work done - new injectors, fuel pump, and starter. That’s a good sign the previous owner addressed some of these issues. At $24k, it’s fairly priced for a clean example, especially with the recent restoration work.
Want me to help you find similar Defenders or dig deeper into any specific problem area?