2000 sohc timing questions

[Blaisdelllance]

Hello,
I bought a used 2000 explorer 4x with the sohc 4.0
And it has the dreaded chain noise at 155,000 miles. I'm a diesel mechanic and know what's up. I got a quote from a shop on just the labor alone $1500. I will provide the parts.
My question is what bolts to replace for sure.

 

[Fix4Dirt]

the 1500 labor seems about right for both guides. theyre replacing both the F/R chains+guides right? theres lots of TTY bolts in the sohc, such as the harmonic balancer bolt, i think the jackshaft sprocket bolts may have been TTY, its been too long since ive done a timing job. make sure they replace ALL the guides with FORD units (imo, OE or bust for these, the other ones are a mixed bag) and imo if youve got the balance shaft, have em remove that when its out, not necessary imo. also, when doing the hydraulic tensioners, you got 2 options: ford unit, or manual tensioner from a polaris RZR. the manual tensioners dont need 75k replacement interval, and dont fail with ag like these do, leading to the startup rattle. member 2000streetrod has lots of good threads on the sohc. theres one called timing chain PNs iirc. make sure to get ford guides though!

edit: here ya go Solved - SOHC V6 Timing Chain Related PNs

 

[Blaisdelllance]

Yeah I plan on a Coyles kit $327. Napa gaskets ect. Bought the tool already.
They are pulling the engine and guaranteed the work. I think I just need jackshaft bolts. The rest is serviceable right?

 

[Fix4Dirt]

Yeah I plan on a Coyles kit $327. Napa gaskets ect. Bought the tool already.
They are pulling the engine and guaranteed the work. I think I just need jackshaft bolts. The rest is serviceable right?

imo get the ford parts, not cloyes. cloyes is made by borg warner iirc, but imo it isnt up to par with the ford stuff imo

 

[Blaisdelllance]

imo get the ford parts, not cloyes. cloyes is made by borg warner iirc, but imo it isnt up to par with the ford stuff ii

 

[Fix4Dirt]

sorry, i dont see a message with the post

 

[Blaisdelllance]

The shop pulled the engine.Then sent me a video of the damage. My educated guess was correct. The rear timing cassette had came apart. The rear chain was riding on the top bolt..

 

[C420sailor]

Ford OEM. I think @donalds has had good luck with Melling, too.

We’ve had a ton of people here replace their aging Ford hydraulic tensioners with Cloyes, only to claim that the engine sounded far worse than with the worn out Ford parts. Installing a Ford unit fixed the issue.

We had a small number of people use Cloyes for the timing rebuild and report catastrophic failures. One somewhat recently had his brand new Cloyes chain fail after something like 300mi.

This data is biased, as people tend to only post here when things go wrong, I will admit. YMMV

This is one of those ‘buy once, cry once’ jobs.

 

[donalds]

Ford OEM. I think @donalds has had good luck with Melling, too.

We’ve had a ton of people here replace their aging Ford hydraulic tensioners with Cloyes, only to claim that the engine sounded far worse than with the worn out Ford parts. Installing a Ford unit fixed the issue.

We had a small number of people use Cloyes for the timing rebuild and report catastrophic failures. One somewhat recently had his brand new Cloyes chain fail after something like 300mi.

This data is biased, as people tend to only post here when things go wrong, I will admit. YMMV

This is one of those ‘buy once, cry once’ jobs.

Nailed it
I have nothing to add

 

[CDW6212R]

Replace the jackshaft bolts, and while doing the job, also spring for an upgrade thermostat housing. The OEM plastic older models(pre-2002 I think) had very common leak issues. There are at least two very good aftermarket versions, aluminum, and other than carefully selecting the right version(the hose outlet has two possible angles(get the matching needed one)), those are excellent.

 

[Fix4Dirt]

Replace the jackshaft bolts, and while doing the job, also spring for an upgrade thermostat housing. The OEM plastic older models(pre-2002 I think) had very common leak issues. There are at least two very good aftermarket versions, aluminum, and other than carefully selecting the right version(the hose outlet has two possible angles(get the matching needed one)), those are excellent.

imo even the post 02 ones could use the upgrade (they were plastic still right, couldve sworn dads company car was plastic still in a 3G then a 4G) https://simmonsautosportz.com/produ...tal-thermostat-housing-sa25-w-clips-and-bolts

 

[CDW6212R]

Yes, the next versions Ford made were much better, and the aftermarket a step above those. The huge problem was just with the 1997-01's, the two sensors in those were threaded and virtually never come out without cracking the housing, or they leak before or during any work near them. So that old assembly is a leak problem waiting to happen for all of them. Ford should have recalled those, but evidently the likely tiny leak wasn't any kind of safety danger to force them to do something.

 

[Fix4Dirt]

Yes, the next versions Ford made were much better, and the aftermarket a step above those. The huge problem was just with the 1997-01's, the two sensors in those were threaded and virtually never come out without cracking the housing, or they leak before or during any work near them. So that old assembly is a leak problem waiting to happen for all of them. Ford should have recalled those, but evidently the likely tiny leak wasn't any kind of safety danger to force them to do something.

after a few attempts at getting them out clean i just got a new housing with the sensors, but wish i didnt get the plastic one!!!! 2 year ago me was stupid still geanted i was still in junior high but still!!! metal>plastic. (keeping this here in case i have a relapse)

 

[CDW6212R]

I was really careful with mine in 2006 when I did the timing parts, but I didn't know how big a deal it was for those sensors. Someone not long after that posted of how they had a sensor leaking, and learned how to use the later model top section, and bolt it to the lower. That was way before any aftermarket stuff came along. My thermostat hasn't leaked at all over the 75k miles I put on it since then, and I bought one of the AL versions with new sensors. It's time to do that right soon.