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Old 07-05-2024, 08:23 AM   #11
Dr Terry
FF.Com.Au Hardcore
 
Join Date: Jan 2011
Posts: 1,322
Default Re: [Non Ford] Intermittent Rough / Sluggish Running

Valve guide damage is a strong possibility, we used to see it regularly in the early days of unleaded petrol (mid-late 80s).

Unfortunately you can't prove it by any external testing, you've got to bite the bullet & strip the heads down, once all other possibilities are exhausted.

Dr Terry
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