What causes Timing chain stretch and rattle on startup on the Arch 1s?

Cold start noise, any check engine codes present Estimated fix cost: $800-$1500

What causes Carbon buildup on intake valves on the Arch 1s?

Rough idle, misfires, sluggish throttle response Estimated fix cost: $300-$600

Dipstick level, blue smoke on acceleration Estimated fix cost: $100-$3000

Coolant level, temperature gauge behavior, leaks Estimated fix cost: $400-$900

Known issues to inspect before buying a used Arch 1s. What to check and how much repairs cost.

SERIOUS

Cold start noise, any check engine codes present

Fix cost: $800-$1500

MODERATE

Rough idle, misfires, sluggish throttle response

Fix cost: $300-$600

MODERATE

Dipstick level, blue smoke on acceleration

Fix cost: $100-$3000

SERIOUS

Coolant level, temperature gauge behavior, leaks

Fix cost: $400-$900

☐Pull all stored fault codes before buying

☐Check oil level and color carefully

☐Cold start the engine yourself always

☐Verify full service history with receipts

Decent if maintained, costly when neglected