Gen 2 timing question

[Mrfixit9745]

Hi everybody. I am a new member here but I appreciate all of the information I have received so far. I am just finishing up putting together a new engine for my 2015 GT. Based on availability, I bought a gen 3 lower end from Ford, and was able to get my hands on a brand new set of, GEN 2 heads. Cams are new as are most of timing components except phasers. I’m just about ready to drop her in, and I noticed that the timing chain seems to get fairly loose on the non-tensioner side of the guides. This happens when the tensioner is fully depressed. I am almost positive. I did the timing correctly, as there is a ton of information on it. I just happen to spin the crank a bunch of times and realized how loose it gets and then quickly tightens up again. Wondering if this is normal, or if there is a possibility, I did something wrong. Any information would be greatly appreciated. Thanks!

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[SheepDog]

The reason is because there is no oil pressure pushing on the tensioners and phasers. You should prime the oiling system before you fire it up. There are some videos floating around explaining how to do this, but basically you need a 1/8 npt with a 3/8" barbed end fitting to thread into the oil pressure sensor hole, and then attach the barbed end to a section of hose that will attach to a garden sprayer. You can make your own transfer pump out of a new garden sprayer for cheap. This setup will also work for many types of fluid transfer where access is an issue. (Transmission fill holes, differentials, etc.) Here is an example

 

[SheepDog]

 

[Mrfixit9745]

Thanks for the quick reply! I had no idea the oil pressure could make such a difference on those tensioners and phasers. Everything seem to be tight and spring loaded, but this is my first go around at this type of engine. Furthermore, I have never primed an engine before but I will definitely do that. This is why I love these types of forums!

 

[SheepDog]

Hopefully you didn't go to all that trouble without installing upgraded oil pump/timing sprocket gears....

 

[Mrfixit9745]

I did do the oil pump gear. Stuck with oem timing sprocket. I don’t plan to race it or anything. Just using her for every day driving for me and my son.

 

[SheepDog]

I did do the oil pump gear. Stuck with oem timing sprocket. I don’t plan to race it or anything. Just using her for every day driving for me and my son.

If you don't intend of forced induction, you are good to go. Plenty of people on here using the OEM stuff even with boost. I'm the type that will worry about it every time I go WOT, but N.A you will be fine

 

[KingKona]

....I have never primed an engine before but I will definitely do that....

What do you mean by priming an engine?

 

[Mrfixit9745]

I have never primed the engine with oil as Sheepdog pointed out and showed the video for. I have only just assembled everything with assembly lube and let the motor do the rest once it was started.

 

[KingKona]

I have never primed the engine with oil as Sheepdog pointed out and showed the video for. I have only just assembled everything with assembly lube and let the motor do the rest once it was started.

There is absolutely no reason to "prime" an engine.

I promise, Ford doesn't do that when they roll them off the assembly line.

 

[Mrfixit9745]

That’s good to know. I may do it anyway just to be safe. Can anyone else confirm that the time chain can appear to be that loose in certain positions until the engine is up to oil pressure? It seems kind of odd.

 

[SheepDog]

There is absolutely no reason to "prime" an engine.

I promise, Ford doesn't do that when they roll them off the assembly line.

Yeah your probably right, Im sure the guys at MMR don't know what they are talking about.

 

[KingKona]

Yeah your probably right, Im sure the guys at MMR don't know what they are talking about.

And definitely not Ford. They don't know what they are talking about.

And Chrysler.

And GM.

And Toyota.

And Honda.

And Porsche.

And Volkswagen.

And Mazda.

And Subaru.

And Audi.

And Mercedes.

And Land Rover.

And Hyundai.

And Kia.

But you go right ahead accepting everything you see on YouTube/Al Gore web as gospel.

 

[jmagnus87]

After doing timing chains on my 4.6L which is very similar to the coyote, i filled the pan with oil, kept the timing chain cover off, hooked up the starter and cranked the motor until i saw the oil spraying on the chains.
This is by no means a tech guide or any version of a professional motor builder, but it worked for me and my engine worked great!

and to answer your question, yes, i found the same again on the 4.6 that there was slack on the passenger side i believe. if you had any issues with timing, your valves would have slapped the top of the piston anyway, so i think you're good. get some oil and try it for funzies if you want

 

[SheepDog]

And definitely not Ford.

And Chrysler.

And GM.

And Toyota.

And Honda.

And Porsche.

And Volkswagen.

And......

But you go right ahead accepting everything you see on YouTube/Al Gore web as gospel.

You really think that any of those manufacturers are doing what is "Best" for your engine? They are in the business of making money, which includes building products that don't last forever, so that you keep buying more of them. Best practice, and "well, Ford doesn't do it so it must be good" are not the same thing.

Why did you replace all those parts on your car with aftermarket stuff if what Ford designed and installed was already the best of the best?

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