4.0 SOHC pulley bolt

[gw33gp]

I am gathering parts to replace the timing chain cassettes and other related parts in my 4.0 SOHC engine with over 250K miles on it. I plan to do this work later this year. I have found Ford part numbers for almost everything and confirmation they are the parts I need.

The one thing I have run into a dead end on is the crankshaft pulley bolt. I understand it is a 'torque to yield' bolt and must be replaced with a new one during assembly. The problem is I can't find a good part number for it. I was advised the last number that Ford had for it was N807551-S100 bit it was discontinued. Part number E7RY-6A340-B pops up in Google searches but that shows as 'not for my engine' on Ford part websites.

Does anyone have any suggestions where I can find this non existent bolt?

 

[pjtoledo]

E7RY-6A340-B is a full thread bolt, so it is not torque to yield.

tty bolts need some unthreaded shaft to stretch.

can't help you on the N807551-S100

 

[sgtsandman]

This is the first I’ve heard of it being torque to yield. I’ve only heard of head bolts being like that.

 

[RonD]

No, the crank pulley bolt on the 4.0l SOHC wouldn't be TTY, no reason for it

I could see the 2.3l DOHC using one because cranks timing chain gear and pulley are friction fit, no keyways to hold position

 

[gw33gp]

Interesting. The jackshaft/sprocket bolts appear to be full thread bolts and they are TTY. I know they are required to be replaced. It specifically states that in the Ford repair manual and they are torqued to a specific value and rotated another specific degree angle. I will have to look at the Ford repair manual again regarding the crank pulley bolt. I thought I saw it stated to replace it and is TTY, but I am not 100% sure on that.

Searching out all the parts I need for this project has gotten me very confused. I wish Ford would have a complete kit for the cam timing system rebuild like what is available aftermarket. I just don't trust aftermarket engine items to be quality. Even Ford parts people have difficulty figuring out the part numbers I need. I don't even want to try to figure out how many hours I have spent on the phone and internet trying to get the right part numbers.

 

[gw33gp]

I checked my Ford repair manual and it specifically states the crankshaft pulley bolt (they call it a damper bolt) is TTY and cannot be reused. The torque sequence is specified like a TTY bolt also (torque to 37 ft-lbs and rotate another 90 degrees.).

I was given another part number (F5RZ-6A340-B) that is called a damper bolt but it looks like it is for the 4.0 OHV engine.

I also watched a YouTube video series on the project by FordTechMakuLoco. He really seems to know what he is doing and pretty thorough. It is hard to tell but it looks like he reuses the crankshaft bolt. He doesn't say if he is reusing it or using a new one but it doesn't look new. He doesn't say it is a torque TTY bolt either but he does give the TTY torque procedure. I don't know how you can get the proper torque on a used TTY bolt.

Still searching for more information.

 

[Snoranger]

It is a TTY, and you’re supposed to replace it...
Straight from Fords website:

 

[RonD]

Well I will put that in my brain and see if it takes root, but still can't see a reason for TTY at that location, can see the crank and pulley getting all that hot and expanding and contracting over the drive cycles, like heads do

I think Ford used TTY on mains and connecting rods but they can be reused 2 or 3 times before replacing

 

[gw33gp]

I finally called my local dealer to see if they could come up with anything. I normally only use them for emergency items because their prices are way to high.

They did find a part number and confirmed E7RY-6A340-B is the correct bolt the 4.0 SOHC crank pulley. They actually have it in stock.

I still find on some websites it shows it is not for my vehicle. Some websites indicate it is only for the Mustang 4.0 SOHC. I also found a couple websites that indicate it is for the Ranger 4.0 SOHC and actually fits many of the Ranger engines.

I am going to take a look at it tomorrow and will probably buy it if it looks anywhere near right, even though they will charge me 3 to 4 times more than I can get online. I can afford $6 and it would be much easier to take back if it is not right.

 

[arlen.burroughs]

I finally called my local dealer to see if they could come up with anything. I normally only use them for emergency items because their prices are way to high.

They did find a part number and confirmed E7RY-6A340-B is the correct bolt the 4.0 SOHC crank pulley. They actually have it in stock.

I still find on some websites it shows it is not for my vehicle. Some websites indicate it is only for the Mustang 4.0 SOHC. I also found a couple websites that indicate it is for the Ranger 4.0 SOHC and actually fits many of the Ranger engines.

I am going to take a look at it tomorrow and will probably buy it if it looks anywhere near right, even though they will charge me 3 to 4 times more than I can get online. I can afford $6 and it would be much easier to take back if it is not right.

Did that bolt work for you?

 

[gw33gp]

Yes, it did. It was exactly the same thing that was originally in there.

 

[ekrampitzjr]

I looked up the Mazda B4000 4.0 SOHC equivalent part. For all years with the SOHC the Mazda part number is ZZL0-11-376, and the Mazda info says it crosses to Ford number E7RY-6A340-B, the same as some of you have given. The description is the bolt threads are M12 x 1.5 x 72 [mm], or nearly 3 inches long.

The Mazda system still shows a total of 7 at North American warehouses: 2 in California and 5 in Dallas. You might want to talk to your friendly Mazda dealer about ordering the bolt.

Interesting note: though the bolt is the same, there were 2 different pulleys. One was for 1998–2004 and the other for 2005–on. FYI. Should apply to Ford too. Let me know if you need the pulley part numbers. The oil slinger that attaches behind the pulley was the same for all years.

 

[ekrampitzjr]

I was curious and checked some of the camshaft drive parts in the Mazda system, such as the chain "cartridges", tensioners, and associated bolts. Almost all are gone and no longer available from Mazda warehouses.

 

[arlen.burroughs]

Yes, it did. It was exactly the same thing that was originally in there.

Thanks! I found them from the Ford store on Amazon here:

Amazon.com

I also had a tough time finding the jackshaft e18 bolts, but I found those on amazon too:

Amazon.com

The title says "hex head bolts" but the part number and the picture are correct, so I will see what comes!

 

[2 bronco 11s]

E7RY-6A340-B (1987 year ) replaced D4ZZ-6A340-A (1974 year) . Original bolt required a washer , newer one is flanged. Any change on any part gets a new number . This works on 1983-2011 rangers, and 1984-1990 BR11’s all engines . This bolt torqued . Fairly easy to find . Hope this helps .