Thanks DJ I just ordered 4 x 10 foot boxes of chain and 9 x connectors from Renold in Perth and saved over $300 compared to the quote from Renolds Sydney. It's hard to believe how much the price varies even though it comes from the same Melbourne factory. Cheers, Al
The new chain has arrived. It was even posted from the Sydney office but with the discounted Perth price. The two chains at the bottom of this pic are - Top one is out of one of our Ferrari V12's The bottom is from a Ford Cosworth BOA 2.9l 24valve V6 The V6 one is a lot longer than our chains but seems to have a lot longer service life even though it still drives 4 cams and 24 valves??? Image Unavailable, Please Login
I emailed them around a year ago, they don’t know or won’t say. Was told it comes in Ferrari packaging and they don’t know where it’s sourced from. Sent from my iPad using FerrariChat
So what is the best option for the chain? Just buy from one of the parts suppliers such as Eurospares, Maranello, Ricambi, etc. or source directly from one of the chain suppliers Reynolds/Japanese? Sent from my MAR-LX1M using Tapatalk
I presume that most chains would do. The real issue is to use the "proper" oil. I know there is the "oil book" on FerrariChat, but I am afraid our cars do not fully qualify for the corresponding analysis as we have this long timing chain. Viscosity improvers do prevent wear of the cylinders and bearings but are useless for the chain (that does require a strong base-stock). If the first figure is to low (ex 5w50) or if the difference between hot/cold viscosity is high (eg: 10w60), the oil achieves its viscosity through viscosity improvers, not from the base-stock. That's how the improvers work : The problem is that the chain will just "crush" these viscosity improvers in no time and you end-up with super thin base-stock. More on synthetic oil stability : https://selectsynthetics.com/part-2--oil-viscosity-grades-.html More on timing chain constraints : https://bobistheoilguy.com/forums/threads/do-you-think-thats-thick-oil-think-again.286877/#post-4717589 So just use a no-nonsense viscosity and accept that the car has to warm-up for ages...
Who knows. Reynolds is the standard others are compared to but I do know some of the Japanese companies make great motorcycle chains.
Has anyone tried the 20W-50 for diesel engines/trucks? They typically have a higher zinc content, which would not matter in a non-cat car. Sent from my MAR-LX1M using Tapatalk
Silly question, where and how is the oil changed on the 412? It is a dry sump, so reservoir oil screw and also one in the crankcase cover? Sent from my MAR-LX1M using Tapatalk
Apart from: Spark Plugs Oil Filter base o-rings Timing chain and guides Valve clearance WUR inspection (perhaps rebuild regardless) Injectors inspection and cleaning Base hoses and pads/discs Rear suspension accumulators Fuel pump gaskets/rubber mounting Replace all fluids Fuel, oil and trans filter What else would you go over/replace on a low milage 412? Sent from my MAR-LX1M using Tapatalk
I'm finally up to installing the new chain in my engine and thought I would hang it up next to the two old chains I have out of two engines that both had about 100.000 Km on them. I can't find in the service records for either car that they have ever had the chain replaced. The old chains don't appear to have stretched that much. Both were out of adjustment on the tensioner though. This may be more due to the wear on the two main chain guide pads. Cheers, Al Image Unavailable, Please Login Image Unavailable, Please Login
I have replaced a number of 400 chains. I'd be really surprised if those had 100,000 km on them. Typically they are a lot longer, after even just 40 or 50,000 km. if you lay them flat on a table and scrunch it up to be as short as possible then pull it out it gains a few links in length. I know a shop that turned a 400 engine backwards replacing the clutch and the chain was so loose it retarded the valves so far it bent the valves. Do you happen to recall how far in the chain adjusting screw was?
I also have excellent result with mobil delvac MX 15w40. I've switched to these oil with narrow viscosity range after reading the result of an analysis of the cause of stretched chain by a japanese manufacturer. My chain which was changed at approx 55.000km. It had stretched more than Al's when the engine was rebuilt at 98.000km. That's the reason I decided to change the oil. Stretch could have been related to my engine failure though. @Al Campbell : As a curiosity, are the sprockets still nice? This would indicate whether the chain could have been changed without removing the whole timing chest.
