dobbo Posted 25November, 2018 Report Share Posted 25November, 2018 I've owned this 1980 928 for a couple of years now and its had noisey lifters since day one. I assumed it would go away after being driven for a while as it wasn't used much by previous owner, so I tried lifter ease in the oil with minimal success on rare occasions it would quiet down but not for long. It's due for an oil change soon (castrol gtx3) and was wondering about putting in some oil flushing additive before I change oil and filter any advice welcome. Oil pressure is good but the noisey motor is a pain and I would like to get rid of it. Thanks Dobbo. Quote Link to comment Share on other sites More sharing options...
ANF Posted 25November, 2018 Report Share Posted 25November, 2018 Hi Dobbo, what viscosity is the GTX? I always put in Penrite Engine Flush. Having my engine apart and looking in depth at the lifters, all of mine were "solid" and I have been working to free them up, although they were never noisy! Maybe try a different engine oil as well? A few including me run Penrite HPR 30 with good results. The lifters are very simplistic in their design, but have small holes and a couple of "chambers", can easily become clogged. Cheers An exploded view..... Quote Link to comment Share on other sites More sharing options...
dobbo Posted 26November, 2018 Author Report Share Posted 26November, 2018 Thanks Adam 20w50 will try Penrite oil flush. ANF 1 Quote Link to comment Share on other sites More sharing options...
dobbo Posted 6July, 2019 Author Report Share Posted 6July, 2019 Finally got around to flush engine with Penrite oil flush and refill with Penrite HPR oil, lifter noise much quieter. Changed fuel and air filter as well was surprised with amount of crap in fuel filter after 20000kms. Quiet engine happy days much nicer to drive now. ANF and tazzieman 2 Quote Link to comment Share on other sites More sharing options...
ANF Posted 6July, 2019 Report Share Posted 6July, 2019 Well done 👍 Quote Link to comment Share on other sites More sharing options...
dobbo Posted 7July, 2019 Author Report Share Posted 7July, 2019 Drove car this morning seems noisy lifters are back until engine hot then quiets down. Still a big improvement , will drive some more and see if it improves. Quote Link to comment Share on other sites More sharing options...
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