| Author |
Message |
Nick Scianna (Nick)
| | Posted on Thursday, November 01, 2001 - 1:32 am: | |
Hi.It depends on a few things,I personally drive the living crap out of my cars,Ex chain guy,still gear head!so I change my belts every three years or less,thats me.You do have a chance that your cam seals could start to leak after you replace the cam cover gaskets,depending on how they were torqued down by the person who did them last,it has been known to happen,If you are diving into the car anyways,just do it all,and while you are there you can check over other things that are related,such as tensioner bearings and lower cam pulley bearings as some chat members have found out,it is always better to be safe than sorry!If you have any specifics,you can contact me directly and I will respond.Nick Scianna www.nicksforzaferrari.com |
Steve (Steve)
| | Posted on Sunday, October 28, 2001 - 6:24 am: | |
Hi Nick , I have an age old question on timing belt change.I've been a chain guy for all of my 40 + gearhead years with the exception of my wife's Volvo 740. Most late model cars go for a min. of 50K miles up to 100K or 7 years before a timing belt change. So I have this 77 308GTB with 42K on the clock with the 30K tune up done at 32K and 2 years ago. Car runs great and I did a valve check at 37K (all OK)when I needed to replace cam cover gaskets (guy used the wrong ones that shrunk).So I'm about to take the car down for winter and my question is do I do a normal 15K service and wait for another 15K (this would be 62K)for the belt change. What is your expert opinion? Thanks Steve |
Nick Scianna (Nick)
| | Posted on Wednesday, October 24, 2001 - 12:11 am: | |
Next door to our machine shop we have a "Snake oil" manufacture,so I am very familiar on late night Infomercial TV tricks etc.Chlorine is a big one,there are others also.We also use a few special additives in our modified timing belt tensioner bearings.I am not a oil chemist but the guys next door to us are,and it is a science,it and it is too complex to go on about on a chat site as there are so many variables,I have seen Gallons upon gallons of "Snake oil" ruined by putting one of the ingredients in recipe in the wrong order! At least they had the integrity to take the loss on it and not ship it out,but you never know with some of these companies.The interesting thing is that most oil additives are based on recycled oil!Just use a good synthetic oil,I personally like the Mobil 1 and I have my own reasons,some guys like Red line,some Amsoil,Shell,Castrol,Quaker State etc.It is pretty hard to improve on a synthetic oil.Nick Scianna.. |
magoo (Magoo)
| | Posted on Tuesday, October 23, 2001 - 9:57 pm: | |
I have heard that some additives have chlorine in them to offer breakdown resistance. Imagine that in a aluminum block. I am very cautious about additives. Other than Techron and Marvel Mystery oil which have proven to be safe over the years I do not use anything else. |
Najib Amanullah (Najib)
| | Posted on Tuesday, October 23, 2001 - 1:58 pm: | |
OK my understanding is that this "majic" stuff bonds itself better to the metal parts. So as Nick said there is more friction at initial cold start-up. If this lubricant is better at bonding to metal then it probably helps reduce friction and damage at cold start-up.
Similarly, it also helps reduce friction when engine is hot and running hard. Does this make sense to any of the experts and chemists out there?!!! I am not one of them. |
Herbert Edward Gault (Irfgt)
| | Posted on Tuesday, October 23, 2001 - 6:33 am: | |
I personally tried Slick 50 in one of my cars and found that it did not measure up to any of it's claims. If synthetic oils keep from having any wear, how can you improve on that? |
Najib Amanullah (Najib)
| | Posted on Tuesday, October 23, 2001 - 4:45 am: | |
Hi
I read your very detailed contribution with interest. I am one of the converted ever since Mobil simulated a test on the BMW 3 series and after countless miles found that all crucial engine parts were still within the manufacturers tolerance limits.
What is your opinion on the so called metal treatments you see advertised on TV. First you had XR1 now there is PS23 (probably called different names in different countries). Do they really work? Can they be harmful? They are said to contain no Teflon etc. and manufacturers claim they reduce friction and add bhp.
I tried XR1 on my old Mitsubishi Pajero at 80,000 kms. When the car went in for the timing belts to be replaced at 95,000 kms, I was told by the mechanic he was very impressed at how clean some of the part were in spite of their age.
Any input from all readers is welcome. |
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