Last night ,i lost my compression on no:4-7-8 :mad: . The 4 - 8 was low long time ago around 30K at 350psi.

Last night they all drop under 100psi.

No bubble in the radiator ,it dos not look to be head gasket.

It sound like valve train or crack head Knocking noise when the engine rev under load but shaky just a little at idle and no noise.

No more power to go over 30mphCensored

Ed

:eek:

What are you going to do first, pull a head?

Well, at least you've still got the crewcab...

I guess you won't be needing that WVO setup anymore... You can just ship it to me...


):h Just kidding...

:eek:

What are you going to do first, pull a head?

Well, at least you've still got the crewcab...

I guess you won't be needing that WVO setup anymore... You can just ship it to me...


):h Just kidding...

:D :D :D For starter i ask my son the remove 6 bolts on the truck and i will pull the complete engine/trany out of the pickup.
I have a bad back with artitic condition on many articulation-:t

When the engine stand on the positionner then i will pop the head to see the cause of that situation.

Actualy i will still need my WVO setup):h , , , , for my crewcab. When i fill up the 2 tank's this afternoon i put 95$ in it Censored . It is so far from my previus fuel cost and i suspect it won't do more than 15-16mpg.

Trany is a th400 with a 4.11 diff and 215/75R/16 tire.

Acyually he is the heavyer but much faster with that setup :rolleyes:

Kind of sounds like cracked head issues. Check around the valve seats as that's one of the more common places for cracks to occur.

With the engine running, remove oil fill cap. Is there excessive blowby with a pulsing? This could indicate one or more cracked pistons. Another way to check, would be to make a tool to apply compressed air through the glow plug port and see where the air goes. My guess is cracked piston or broken rings or it could be some rocker arm keepers have let go and the valves aren't opening due to the pushrod falling out.

how many miles were on that engine before it happened? i see 309k in your sig but you are from canada so does that mean kilometers?
Paul

Hi Paul , actually i have 334.989 Km = 208.000 miles . almost new ,thats why it is still park in my driveway and the tranny/diff were rebuilds under 20.000 miles ago.


Ed

Ed,
so do you have any idea what could have caused the engine to fail with such low miles on it?
thanks,
Paul

Hi , maybe to much experimentation or broken valve .
Loud knocking noise and low compression
No bubble in the radiator but maybe it bubble on the oil side?
I already replace the injectors with no result.
I preffer to stop it before i see a connecting rod passing by the sidewall:eek:

Tigman,

Remove the valve covers and look for missing rocker arm retainers and or push rods that have fallen out. This can cause no compression and is usually an easy fix.:)

Hi D.Camilleri sorry but no easy fix for this time .

my son and i pull the engine out to have a look at .

7 valve does not seal tight , show sign of air pass thrue (the white line around the valves)and both head are cracked :mad: , but i have a spare set on the shelf .

http://i68.photobucket.com/albums/i29/tigman_photos/Thermostat004.jpg

it look like aluminium dust ( from previus head porting maybe?) or sand dust , stick to the valve seat.
but the crack are genuine GM poor design cause.

1/2 the head bolt had poor tork tension and the head gasket was about to fail also . that may be cause when i try 25% gasoline :badidea: in my mix with 20%tranny oil and wvo for the rest just for once . It feel like it have too much power for a 6.2 so i new something was wrong with that mix .


The good news are ,

:D :D :D :D no sign at all :D :D :D :D ,

of my WVO experimentation on the piston , ring ,cylinder wall and head explosion chamber.




Ed

Finally after a complete tear down of the engine i'm positive, is way over 300K and had suffer oil starvation from his previus owner

The valves are stamped into the head and a rib about 0.40" -.060" deep is visibleinto the head + the valves are worn out due to high milage.The camshaft and 5 lifter are bad and the piston need rings . The crank need new bearing also

i will think if i rebuild or replace the engine before i decide if my truck go to retirement

Ed

Ed,
how many miles on wvo did that engine get? just curious because you said there were no signs of damage due to it but i would like to know how many miles (or kilometers, please specify either way) were run on it.
thanks,
Paul

I have a camshaft I can let go of if you're interested tigman.

Sounds like it's time for an overhaul...

Hmmm... Gasoline... More power... Blown head gaskets... Are you sure it wasn't the bacon grease? ):h

Ed,
how many miles on wvo did that engine get? just curious because you said there were no signs of damage due to it but i would like to know how many miles (or kilometers, please specify either way) were run on it.
thanks,
Paul

Hi i go for 34943km (2171.5mi) exacly on 100% WVO and 18 special carfully elaborated mixtures (6.5 us gallons volumes each ).

rock_shoesI have a camshaft I can let go of if you're interested tigman.Yesterday 05:49 AM
noted

High Sierra 2500Sounds like it's time for an overhaul...
Are you sure it wasn't the bacon grease? ):h

HS2500 , at least the mains are ok on the block.

I try to figure out :if the hot fuel injected ,in theory advance the timing.

If the timing is advance too much ,what is the nature of the damage can occures in that case of figure ?
I know the answer on gasoline engine but not on diesel engine. It's my first time trying to troubleshoot the cause of damage on diesel :help2:


Ed

Excessive timing advance can overheat the pistons. I suppose it could hurt the valves as well, but I think it would melt the pistons first. In any case, it doesn't look like it had anything to do with the failure of your engine... :)

With a timing advance you get a very noticeable HP gain... For a while... Timing advances are also usually accompanied by a noticeable increase in engine noise.


I was just joking about the bacon grease... You are probably right about the gasoline causing the head gasket failure. I don't think the veggie (or bacon ):h) had anything to do with that...

I've been wondering... If veggie oil makes your exhaust smell like french fries or grilling hamburgers, what does it smell like running on bacon grease? Not joking here, I seriously wonder if it smells different...

High Sierra 2500Excessive timing advance can overheat the pistons. I suppose it could hurt the valves as well, but I think it would melt the pistons first.

Hi the pistons are ok just the rings ares wear behond limites.

High Sierra 2500 If veggie oil makes your exhaust smell like french fries or grilling hamburgers, what does it smell like running on bacon grease? Not joking here, I seriously wonder if it smells different...

It smell like -:t if you dont add acetone in it .

My brother suspect i put to much vinegar in my fries and cause my engine breakdown:rolleyes:

ED

Hi , finally i decide to put the pickup into pieces.
I need some spare parts on my shelfs for the future and some free parking space around the house (said my wife:hail: ) .

Next saturday morning i bring the torches home for a major chirurgical diet:bawl: and I will bring the carcass to the cemetery of cars and will request so that it rests in peace


Ed

Hi , finally i decide to put the pickup into pieces.
I need some spare parts on my shelfs for the future and some free parking space around the house (said my wife:hail: ) .

Next saturday morning i bring the torches home for a major chirurgical diet:bawl: and I will bring the carcass to the cemetery of cars and will request so that it rests in peace


Ed

Another one finally makes it to the graveyard. It's always kind of sad to see, but nothing lasts forever. Hopefully you can at least plunder some good parts.

Hi , finally i decide to put the pickup into pieces.
I need some spare parts on my shelfs for the future and some free parking space around the house (said my wife ) .

Next saturday morning i bring the torches home for a major chirurgical diet and I will bring the carcass to the cemetery of cars and will request so that it rests in peace


Nooooo.... :eek: ):h

Well, at least you have a replacement truck... It won't get the same kind of mileage, though. Not that that matters when you run WVO...

It won't get the same kind of mileage, though. Not that that matters when you run WVO...

For the moment but the following weekend I install my 3.08 in my crewcab If I reach 25mpg my objective will be reached ,if not the th700 will follows. ):h

Ed

Now its done ,my truck is on his way to Japan by boat.
In 6 months it should be back with a Honda crest on the hood -:t in 20 copies

But that ok for me i'm the one who pull the best of it first:)



http://i68.photobucket.com/albums/i29/tigman_photos/Thermostat009.jpg (http://i68.photobucket.com/albums/i29/tigman_photos/Thermostat009.jpg)
(Image has been resized. Click it for full size.)


http://i68.photobucket.com/albums/i29/tigman_photos/Thermostat011.jpg

She looks fairly rust-free. Probably could have saved the body panels too if you had use for them.

That truck has far less rust on it than mine does... :eek: And it isn't all banged up, either...

If I'd known that is what it looked like I would have driven up there and bought it from you for scrap value just for the body... Oh well, I guess I'm a little late now.

Ummm... Are those brake calipers and rotors in the picture new or do they just look like it? :eek:

Then again, scrap prices are up... I've been hauling a lot lately.