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1999 Rolls-Royce Silver Spur, Mulsanne Green
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After dealing with various cooling system leaks y car developed a new hydraulic system leak in one of the accumulators. That was fixed and brakes bled but then we had a hydraulic pressure spike and one of my hydraulic system pumps bent its needle. That required disassembly of the intake system to get it out and fix it. What a nightmare. Now with that all off we are also replacing the valve cover gaskets. Any idea why we would have a pressure spike in the system that would cause that? This car has been a horrible money pit. Much worse than my ‘88 was…
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A brake pump pushrod failure would be caused by a seized accumulator valve, or a seized brake pump. Did the shop replace the leaking accumulator valve with a new, used, or rebuilt valve? Did the pushrod bend right after rectifying the accumulator valve leak?
 

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Begs the question, why didn't they replace the pressure valve at the same time, and or test with a gauge at the pressure valve before or after the accumulator replacement.
Now it's removal time and replacement at the customers' expense.
 

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I suspect they installed a faulty accumulator valve or didn't overhaul it properly if they rebuilt it themselves. Have you asked about that?
 

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Make sure they replace the intake runner O rings with new, they are a common source of vacuum leaks. Also make sure they use Hylomar or Loctite anaerobic sealant for the valley cover, not silicone.
 
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