1990 Porsche 911 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Porsche 911
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1990 Porsche 911 ProblemsEngine Oil Leaks
Over time, the engine can leak oil at various locations. Early-production vehicles require engine disassembly and modification to resolve leaks at the cylinder heads, oil return tubes, valve covers, timing cover, chain housings, case through bolts, and lines to/from the oil cooler.
Check Engine Light illumination and performance issues can be caused by oxygen sensor faults.
1990 Porsche 911 QuestionsDo you have to pull the engine to replace the power steering pump? (1 answer)
Since the power steering pump is driven off the camshaft do you have to pull the engine to replace it?
I took my 1990 C4 Cabriolet to a local repair shop for an oil change. They replaced the filter and pulled the drain plug and per the owners manual added 6.5 qts, let the engine idle and tried to add the additional 3.5. They couldn't get more than 8.5 qts total into it. At idle it was overf...
I was informed to avoid looking at 1990-91 Porsche 911's. Is there a reason?