Canadian Hummer Club Forums

I just can't seem to get a break.  Yesterday was taking out the Humvee for a drive and as i was about to pull on to the DVP something let go.  I had heard a slight lifter type ticking just before it got bad, there is  a video attached if I can get it to upload.
 
As near as i can tell it is the driver side valve train but I am not 100% sure.  I am debating whether to pull the valve cover off or to take it to a shop for professional repair.  I am a bit worried about having to remove all the injector lines just to get the cover off and look.  Oil pressure and level, coolant and trans fluids were all good, I had actually just checked them before i left.
 
I will have to download the video from my iPad in a separate post.

Videos from inside the doghouse....with a stethoscope it seems to originate from the left side.

Sounds like a rocker trying to push a seized push rod.
Cover and maybe even the head has to come off anyway so you will find out for sure.
You should also do a Blackstone oil test to see what else may be in there.
Only other thing i can think of is a bad injector may have torched a small hole in the piston.
It can sorta sound like that.
Sorry your having all these issues.

Hi Wolf,
 
How many Kms on this engine? Is it original or a later year drop in?

Other thing i use is a breaker bar as an earpiece. Better than steth IMO.
Put the open end to your ear and the butt end to the side of each injector and listen.

The odometer has 30000miles on it, so 50k km. But I had heard that they didn't put in the 6.5s in Humvees until 1989. Which means it's probably been swapped out at some point since it's an 87.


I just found the nameplate today while I was under it. When I first got the Humvee I had to figure out if it was a 6.5 or 6.2.

Serious ? Man what else?

Uggg sorry to hear, so hard to always tell how the previous use was....or maintenance ......

One thing I got to understand is these are not hard per say, (6.2 / 6.5) for repair,... It's mostly hours,.

Man I hope it's something stupid small, like an injector,.,,or tranny protection plate hitting the flywheel,...

But sorta has a rocker ish sound....like one fell,


Jezzz your motor sounds smooth (minus that tick),..,, or your video has sound enhancement to make sound better... Lol I look around when ever I start, lol to see who pissed at the noise, hahahha


But ya before ya "dig" look for easy visible weird stuff first..

I am a bit frustrated since the engine did purr like a kitten until things started going sideways. Still starts like a champ, but the day before I took the Humvee out and had a white smoke till she got warm a lot worse than I had ever seen (5 minutes till I drove a bit). So I checked the glow plug harnesses since the front connectors were under a lot of tension. After reseating (aka. Jiggling) the connectors on the glow plugs the next start was normal, about 10 seconds of smoking and it quickly cleared up.


Maybe it was just a coincidence and this is related to the issue I have now.

The fluids are still clean, I don't want to drain the oil until I am sure I don't need to move the truck. But there is no sign of oil loss or contamination yet.


If I pull off the injector lines, all four on that side am I going to have trouble bleeding it?

Is there any way this type of noise could be contaminated fuel related, as in water.... I don't think it is but I thought I'd ask?


This is what it sounds like underneath.
Seeing as it seems to be the top end I figured the valve cover first and if that's clear the oil pan to check the bottom end. Neither of these I look forward to doing in the driveway since the hood doesn't keep the water from going in the engine bay...

This sounds "tinny" and stops when the engine gets a little shot of fuel and surges slightly. Do you have the casting numbers off the rear of your block? I am having trouble cross referencing the SN for the engine.
 
Left Rear:
   
Right Rear:
 

motor seems to be a 6.5
things to do/ check...
 
add a liter of trany oil to the oil --this cleans some oil slug off the push rods/rockers..run for a bit, did it improve
 
flywheel...cracked center or loose bolts (12)