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Old 12-30-2011, 07:20 PM   #21 (permalink)
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Re: Timing Chain Failure-Warning

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There's over 53,000 registered members to this site and yet we haven't heard of a single time chain failure (that I know of). This makes me wonder if your customer had the FJC confused with some other vehicle.

DEWFPO
This.

I'm thinking your customer was confused.
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Old 12-30-2011, 07:29 PM   #22 (permalink)
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Re: Timing Chain Failure-Warning

If you've ever had the valve covers off, you will see that it's a pretty stout double roller chain
The engine would have to be seriously sludged up to cause a broken chain. It seems like that would be the acception .
I have pics somewhere
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Old 12-30-2011, 07:33 PM   #23 (permalink)
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Re: Timing Chain Failure-Warning

All I know is what the guy told me, he owns several shops and does a lot of business.

Take it for what it is worth. I do not know the guy well, just building him a bumper.

I just figured I would pass on what he told me.

He owns an 80, totally restored a 40 so I thik he knows at least a little about Toyotas. I change my oil at 3K anyhow.
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Old 12-30-2011, 07:34 PM   #24 (permalink)
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Re: Timing Chain Failure-Warning

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FWIW I just asked a friend who is a Toyota Master tech and he said those chains never break.
This has always made me wonder why they even use timing belts. I had the belt let go on my Civic when it was at 6500 RPM, and it absolutely trashed the top end of the engine. Meanwhile, Nissan's VQ series V6's have timing chains and were on the Ward's 10 Best Engines list from 1995 (first year of the list) until 2008.
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Old 12-30-2011, 08:40 PM   #25 (permalink)
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Re: Timing Chain Failure-Warning

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just out of curiosity , why add slick 50 or Dura lube to a synthetic oil?
Most synth makers recommend not to add anything to their proprietary oils.
Reguardless of what any manufacturers say...there are products that are far supierior in performance to any standard product. I have seen straight slick 50used soley into turbine engines. They idle at 50K and ramped up to 250K rpm's. There are severe friction and heat and viscosity tests that these products are subjected to under severe controled situations. You would be surprised as to the results of your choice brands. Dura Lube has many videos demonstrating test results and product comparisons. These products can be added to most any type of oil or syn formulations. See for yourself Some people are actually running past the 500K mileage marks on there engines...In time I'm counting on the same result...we shall see!
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Old 12-30-2011, 08:48 PM   #26 (permalink)
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Re: Timing Chain Failure-Warning

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Reguardless of what any manufacturers say...there are products that are far supierior in performance to any standard product. I have seen straight slick 50used soley into turbine engines. They idle at 50K and ramped up to 250K rpm's. There are severe friction and heat and viscosity tests that these products are subjected to under severe controled situations. You would be surprised as to the results of your choice brands. Dura Lube has many videos demonstrating test results and product comparisons. These products can be added to most any type of oil or syn formulations. See for yourself Some people are actually running past the 500K mileage marks on there engines...In time I'm counting on the same result...we shall see!
cool! Id def be curious to what oil is used to hold the ingredients of the PTFE/slick 50 and Dura Lube in suspension... true about the OTC synths and Boutique synths but it also depends on use, duration, and reading the UOA`s, more importantly owner maintenance... That`s cool that your experimenting in hopes of reaching 500k!
I`m all to aware of the great oil debate, you should see some of it over the 2 stroke oils...lol...
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Old 12-30-2011, 08:50 PM   #27 (permalink)
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Re: Timing Chain Failure-Warning

My memory failed me
Single chain double sprocket




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Old 12-30-2011, 09:50 PM   #28 (permalink)
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Re: Timing Chain Failure-Warning

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I have always used a synthetic oil from the beginning and a oil supplement like Slick 50 or Dura Lube every other change....My change interval has been 3K even so the manual states 5K...I have started using a 0W-20 lately...wonder if I have any sludge buildup in my engine pushing a 100K?

I have yet to hear a single issue on this problem until now...I could see this a problem for someone who never changes the oil but only adds oil when it's low on the dipstick.
Your use of Slick 50 and Dura Lube has already been questioned, but something else caught my eye. Toyota switched to 0W-20 on the FJ in 2010 when the 1GR-FE was revised from VVT-i to dual VVT-i. It was the revision that prompted Toyota to switch, but would not be recommended for pre-2010 models, regardless if it is synthetic or not. While it may not have on the timing chain (what prompted this line of conversation) the older engine may not be compatible with that grade and using may have other consequences. Personally I am glad I don't have an engine that uses that grade. Although my knowledge may be incorrect, but it is my understanding that Honda has used 0W-20 because it helps raise MPGs (thinner and lighter), but at the cost of engine wear/lifespan.
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Old 12-31-2011, 06:47 AM   #29 (permalink)
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Re: Timing Chain Failure-Warning

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Sile previously said: View Post
This has always made me wonder why they even use timing belts. I had the belt let go on my Civic when it was at 6500 RPM, and it absolutely trashed the top end of the engine. Meanwhile, Nissan's VQ series V6's have timing chains and were on the Ward's 10 Best Engines list from 1995 (first year of the list) until 2008.
Timing belts are used rather than chains because:

1. They are cheap.
2. They are much quieter than chains.
3. They assemble quicker and easier on the assembly line.
4. They do not require lubrication which allows them to run in an oil free environment.
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Old 12-31-2011, 07:45 AM   #30 (permalink)
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Re: Timing Chain Failure-Warning

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jimmiee previously said: View Post
Timing belts are used rather than chains because:

1. They are cheap.
2. They are much quieter than chains.
3. They assemble quicker and easier on the assembly line.
4. They do not require lubrication which allows them to run in an oil free environment.
5. They require periodic replacement which nets the dealers more money in repair costs.
Missed one there chief.
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