Suddenly it's Hammer Time !!

[vs-lover]

Damage might be already done, fingers crossed its not for your sons sake.

Not quite sure what damage (as you suggest) might have been done Trev, can you please elaborate ??

 

[vs-lover]

Sticky lifter for sure.

Have to agree.

Yes thanks "Wot and ram" it's pretty much what I thought also, must admit as I don't know much about the previous service intervals that was (maybe wasn't) done, I feel there may be a fair amount of crud within this engine and something has dislodged and blocked the oil supply to one lifters entry point. If I'm going to have to lift the valley (inlet manifold) on this engine then I might as well install a whole new set of lifters opposed to doing just one. Regardless of that this issue may rear it's ugly head again if my fears are correct.

 

[vs-lover]

Before I go any further I'm wondering if as Losh suggested would any additive in the oil be of much assistance. Truthfully have always considered additives pretty much snake oil and merely a short term band aid effect, but it's far less work and cost than a top end engine pull down at this point in time.

BTW as Trev suggested the HPR 5 oil is a tad thin (which I knew at the time) as it's a 5w 40 and I just bought a 10w 50 as a thicker replacement which I was going to do today, but now I'm thinking it a waste of time until the issue is resolved.

As most of you here would know I'm a bit of a stickler of doing things the correct way, I'm sure Losh could attest to that.

 

[losh1971]

I have used the lifter free up with good results. Its a bit like a flush but doesn't affect the oil like a flush does, which means you can still drive it. Try the Nulon gear first mate, it won't do damage and it might just fix it.
Be good to clean out the engine some more before chucking in a whole new set.

 

[losh1971]

If the Nulon gear doesn't fix it after 500km it will require parts.

 

[vs-lover]

Yep that's my first port of call I'd say and I'll drop in to Sprints shortly a pick up some of this Nulon gear. Must admit I'm starting to think that Penrite have something in their oil that's dislodging crud as I've done a bit of searching here before I posted and Penrite seems to be the common linked denominator to lifter noise issues. BTW I've always used Mobil 1 and had no issues and now that I've switched to Penrite these issues seem to be arising.

 

[Trevor loves holden.]

Not quite sure what damage (as you suggest) might have been done Trev, can you please elaborate ??

Dry starts, means no oil on metal so no lubrication until the oil starts flowing again hence the reason for knocking, 5w is way to light and is drying up as the motor cools, maybe some seafoam might break down the carbon build up to stop sticky lifters or some sort of additive, have you tried running higher octane like 95 or 98 it has more cleaning agent in the fuel, If the car has high K's I would use 20w 50 or 10w 40 + 10. Also 15w 40 be good, good luck.

 

[woteva]

Dry starts, means no oil on metal so no lubrication until the oil starts flowing again hence the reason for knocking, 5w is way to light and is drying up as the motor cools, maybe some seafoam might break down the carbon build up to stop sticky lifters or some sort of additive, have you tried running higher octane like 95 or 98 it has more cleaning agent in the fuel, If the car has high K's I would use 20w 50 or 10w 40 + 10. Also 15w 40 be good, good luck.

 

[Trevor loves holden.]

Wotever, less I don't use modern day oil in old engines, well not yet anyway dementia hasn't taken over completely yet. I hope I don't ever make that mistake to allow the oil to bake on moving parts as it cools and evaporates.
Read this on this link. #3. 5w30 vs 10w40 if oil cant lubricate when hot properly then how will it hold on those moving hot parts when the engine is stopped? And yes higher octane contains more cleaning agent which will give you better running performance.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=2ahUKEwjHg9X25OjlAhWCTX0KHZ8jDGUQFjABegQICxAF&url=https://autooilandfluid.com/5w30-vs-10w30-10w40-0w30/&usg=AOvVaw3IMc3buF2o2lsGocXGJltu

His a light read for you.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=2ahUKEwia5dbT7OjlAhWUT30KHSJNDeUQFjALegQIBBAB&url=https://practicalmotoring.com.au/car-advice/dirt-busting-fuel-fact-or-fiction/&usg=AOvVaw0DsNXSna2c57T2XCPyrGrx

 

[vc commodore]

Does sound like some crud has been dislodged, causing a sticky lifter or 2.

Me personally, I wouldn't use any sort of additive....To me, it's just a bandaid....Giving the engine a good flush and replacing the lifters (if that is the cause), should ensure the issue doesn't rear it's ugly head in the near future....