"Captain Retard" Member 1,417 Member For: 10y 8m 9d Gender: Male Location: Shellharbour NSW Posted 02/08/14 06:43 AM Share Posted 02/08/14 06:43 AM Oil type is not the major cause of the cam lobe wear.I don't think it's on the lobe, it looks like it's worn on the heel.If the lobes good and the heel looks like that then something strange is happening!It would be nice to see a pic of the lobe ! Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 2m 15d Gender: Male Location: Perth Posted 02/08/14 07:09 AM Share Posted 02/08/14 07:09 AM The whole section is called the lobe. The wear does appear to be on the heel ( base circle) which is the least loaded region. It will be a case hardening issue. I might be examining a set soon. 1 Link to comment Share on other sites More sharing options...
"Captain Retard" Member 1,417 Member For: 10y 8m 9d Gender: Male Location: Shellharbour NSW Posted 02/08/14 08:29 AM Share Posted 02/08/14 08:29 AM Ok besides Fords crappy case hardening, I still find it difficult to come to terms with it happening on the heel and not the lobe(sorry the nose).So there is a bit of info I read a while back about synthetic oil and on the drive home from work tonight I had a think about it.I'm just "sayin" so don't flame me for just putting my thoughts out there!What if the roller is skidding on the heel where the only pressure on the roller is from the lifter preload as opposed to the nose where there is a lot more pressure from the valve spring.Every time the roller skids it leaves a tiny bit of pickup(metal) on the lobe heel.This pickup builds up until it is eventually ripped off by the skidding roller.When this happens the pickup also peels off a bit of the case hardening and from there the wear process accelerates.This skidding could be down to a synthetic oils lack of impurities which therefore gives the roller less grip on the lobe heel.I use both mineral and synthetic (sometimes semi synthetic) depending on application. So I'm not an advocate of either!Anyway just a thought! Link to comment Share on other sites More sharing options...
naldz006 Member 61 Member For: 12y 9m 30d Gender: Male Location: Mallee Posted 02/08/14 08:32 AM Share Posted 02/08/14 08:32 AM Yeh can't see how oil type is the problem if it's changed frequently. I just wish arron could get his hands on a set of damaged cams so we could put this whole synthetic vs mineral thing to bed once and for all. 2 Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 7m 11d Gender: Male Location: Adelaide Posted 02/08/14 08:36 AM Share Posted 02/08/14 08:36 AM Just sayin the full syn and mystery cam wear stacks up nicely........Wonder if ford has a reason they recommend semi lol I love to giggle 1 Link to comment Share on other sites More sharing options...
az6 turbo Member 38 Member For: 13y 9d Gender: Male Location: shellharbour Posted 02/08/14 08:59 AM Share Posted 02/08/14 08:59 AM Once I get it repaired I'll send the cam to arronm if he's still interested in checking case hardness. Just don't know how long till I get it repaired. Should be within a couple of weeks, just need to find a cam.Are fg n/a cams the same? Link to comment Share on other sites More sharing options...
"Captain Retard" Member 1,417 Member For: 10y 8m 9d Gender: Male Location: Shellharbour NSW Posted 02/08/14 09:00 AM Share Posted 02/08/14 09:00 AM I've destroyed quiet a few "flat tappet cams" but the only time I've wiped out a "roller cam" has been due too the roller seizing or bearing collapsing .I had problems with the flat tappet cams due to some oil company's removing or reducing the amount of zinc in their oils a few years ago.I now notice that quiet a few oil company's advertise "extra zinc" on their products now!It caused me (and others) a fair bit of grief ! Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 12y 8m 7d Gender: Male Location: Central Coast Posted 02/08/14 09:03 AM Share Posted 02/08/14 09:03 AM Go diesel oil All the cat destroying zinc and molybdenum you can get your hands on 1 Link to comment Share on other sites More sharing options...
Kimberley Scott www.australianflag.org.au Donating Members 6,763 Member For: 19y 5m 25d Gender: Male Location: Brisbane Posted 02/08/14 09:14 AM Share Posted 02/08/14 09:14 AM ^^^^what if you don't have a cat? Link to comment Share on other sites More sharing options...
naldz006 Member 61 Member For: 12y 9m 30d Gender: Male Location: Mallee Posted 02/08/14 09:20 AM Share Posted 02/08/14 09:20 AM (edited) Ford recommend the bare minimum. they want to keep servicing cost down as that's what a lot of people look at when buying a car, fleet in particular. 15000km service interval is too much in my opinion. Ford pushed it out to that as that's what all the other manufacturers were doing. Unfortunately the life span of a car is considered it's warranty these days. Fact is that synthetic oil is a superior lubricant. semi is cheaper and still satisfactory for the engine that's why it's chosen. Hell, the Ford 6 is that reliable it would probably run on canola oil and see out of the warranty period no worries Edited 02/08/14 09:23 AM by naldz006 2 Link to comment Share on other sites More sharing options...
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