1990 CHEVROLET CAMARO RS

Typical onset: 100,000-150,000 mi

Symptoms: knocking or ticking from bottom end at idle, low oil pressure at operating temp, excessive oil consumption (1 qt per 500-1000 mi), visible blue smoke on startup or acceleration

Fix: Main and rod bearings wear prematurely due to oiling system limitations and inadequate maintenance intervals. Requires complete teardown: crank polish or replacement, new bearings, piston rings, often pistons if ring lands are damaged. Budget 18-24 hours labor for an in-frame overhaul, 24-30 hours if pulling the engine for full rebuild. Short block replacement is often more cost-effective than machining.

Estimated cost: $2,800-5,500

Typical onset: 80,000-120,000 mi

Symptoms: transmission fluid leaking from radiator end tank, milky/pink fluid in coolant overflow, transmission slipping or delayed engagement after coolant contamination, rusted or cracked steel cooler lines at frame mounts

Fix: Factory cooler inside the radiator corrodes, allowing fluid cross-contamination that destroys the transmission if not caught early. External lines also rust through. Immediate flush of both systems required if contamination occurs, plus radiator replacement and often transmission rebuild. Preventive fix: replace steel lines with braided stainless, add external cooler. Line replacement alone is 2-3 hours; full contamination scenario with trans rebuild is 12-16 hours total.

Estimated cost: $400-800 (lines/radiator preventive) or $2,200-3,800 (if trans damaged)

Typical onset: 70,000-110,000 mi

Symptoms: harsh clunk on 1-2 upshift or reverse engagement, excessive driveline vibration at idle in gear, visible sagging of tailshaft when inspected from underneath

Fix: Rubber mount separates or tears, allowing tailshaft to drop and impact tunnel. Causes hard shifts and can damage exhaust or driveshaft. Easy fix: 1.0-1.5 hours to drop exhaust and swap mount. Use polyurethane if NVH isn't a concern.

Estimated cost: $150-300

Typical onset: 90,000-140,000 mi

Symptoms: external coolant seepage at head/block junction, white smoke from tailpipe on cold start, overheating with no visible leaks, bubbles in coolant overflow or compression gases in cooling system

Fix: Factory composite gaskets fail due to heat cycling and insufficient clamping force on the 60-degree V6 design. Both heads should be done simultaneously; surfaces often require milling. Budget 10-14 hours labor including coolant flush, timing cover reseal, intake manifold gaskets (always replace when heads are off).

Estimated cost: $1,400-2,200

Typical onset: 80,000-130,000 mi

Symptoms: stumbling or hesitation under load, hard starting after sitting, loss of power above half throttle, check engine light with lean codes

Fix: TBI fuel systems accumulate varnish; in-tank sock filter clogs, starving the pump. Inline filter often neglected (should be replaced every 30k). Drop tank to inspect pump sock and replace pump if weak. Filter replacement is 0.5 hours; pump replacement 2-3 hours including tank drop.

Estimated cost: $35-80 (filter only) or $350-600 (pump + sock + filter)

Typical onset: 100,000+ mi

Symptoms: oil dripping from front cover area, intermittent no-start or stalling (if reluctor wheel corrodes), check engine light with crankshaft position sensor codes

Fix: Front crank seal hardens and leaks; if ignored, oil damages the reluctor wheel for the CPS, causing no-start conditions. Requires timing cover removal, new seal, and sometimes reluctor wheel replacement. 5-7 hours labor if just seal; add 2-3 hours if crank needs R&R for reluctor.

Estimated cost: $400-700 (seal only) or $1,200-1,800 (with reluctor/crank work)