Eratic behavior from an 85' 6.2 (more below) requesting help please (Two vids in one)

[jrsavoie]

Add a bypass filter. Make that engine last forever. I prefer the FS2500

 

[nycxjeremyy]

Continue doing 3,000 miles changes

Or

Do lab tests to find out if you should do them sooner or can run longer & save money.

Yes sir

 

[nycxjeremyy]

Add a bypass filter. Make that engine last forever. I prefer the FS2500

These??

GM 5.3/6.2L/6.0 V8 Bypass Oil Filter Kit

Insane Diesel EXTREME - GMC Yukon XL Denali 6.2 Bypass Oil Filter 1 micron, ultra-fine bypass oil filter kit for GMC Yukon XL Denali 6.2 diesel engines

insanediesel.com

*Cries in E3*

 

[Will L.]

My preference is the Frantz, but I am going off old specifications. Idk if there are others that clean better, especially for the price.

On mine I am gonna run a centrifuge powered by 120v pump when I park it but I will be over 10,000 miles per year.

 

[jrsavoie]

Those look good.

This is what I used.

FS2500Filter.com - A Division of AccurateDiesel.com - Accurate Technical Services, LLC

Authorized Distributor of the FS2500 bypass oil filtration system for Duramax, Cummins, Powerstroke, and more. Install the world's best oil filter. Filter out 99.63% of particles larger than 2.78 microns. Watch the FS2500 video today. A division of AccurateDiesel.com

www.fs2500filter.com

 

[Will L.]

The FS2500 is a good system,
But for half the price is the Frantz.

 

[nycxjeremyy]

Checked the timing chain marks today, all lined up thankfully

 

[Will L.]

The marks should line up when there is a new timing chain. As the chain stretches the timing is supposed to get adjusted. Gm called for 50,000 mile intervals but all the fleets and shops learned 30,000 is a more realistic interval. Doesn’t usually take much, width of a dime each time is fairly close for most. Using the timing gun is the proper way.

 

[nycxjeremyy]

The marks should line up when there is a new timing chain. As the chain stretches the timing is supposed to get adjusted. Gm called for 50,000 mile intervals but all the fleets and shops learned 30,000 is a more realistic interval. Doesn’t usually take much, width of a dime each time is fairly close for most. Using the timing gun is the proper way.

Oh copy. I have not idea if my chain was ever adjusted or not, but I was told that going off that mark indicator was the way to go, and that since the two notches line up, it should all be good

 

[Will L.]

So we have a double roller timing chain that goes from crank to camshaft. The ip is driven of the camshaft. As the chain stretches the cam timing retards which causes harder starting, lost power, etc. then the ip also injects later adding to the problem in itself. The late fuel injection is about 60% of the problem.

If you replace the timing chain with a gear drive set up - current made by Leroy Diesel and he named his “The Time Keeper” it eliminates ever having to retime it once set.

My suggestion to people is only fight the front of the engine once. Do that, front main seal, water pump, harmonic balancer & belt drive pulley if serpentine allmat once. One annoying and expensive weekend. Then it’s ready to rock for many years to come.
If you don’t understand why things like balancer needs changed or others- do ask.
Bad balancer ruined engine and there are complete garbage ones out there for sale -

 

[MrMarty51]

How much slack is on the chain when the crank shaft is rotated, so all slack is on one side ?

 

[Will L.]

He isn’t gonna know without tearing into the engine. It isn’t worth the check.
Just putting a timing gun on there to verify proper injection timing will do it. I just mentioned the cause of why lining up the two marks doesn’t solve the issue.

We have to remember back then the warranty was 36,000 miles. No real care or concern was given outside of warranty other than keep it running in an “ok” status. Hence the timing tool.