- Nov 29, 2021
I would put a can of Berrymans Chemtool in the oil and let the engine idle for 15-20 minutes, do not drive the car or rev the engine.
Change the oil and add a bottle of HPL engine cleaner for 3K, change the oil filter at 2K then check the compression, all plugs removed, warm engine and WOT. It may have sticking rings and plenty of varnish which is common on some of these engines. Forget the restore, if it is sticking rings you want to free them not try and plug them up even more.
If that doesnt help you probably need a used engine or a rebuild or top end job, whatever is causing the low compression.
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HPL EC is a wonderful product.