Compression help.

[The Slider]

Long story short.....

I had my engine rebuilt, drove great for about 50 miles. 2 days back and forth to work... THEN it started spitting black smoke.When its cold it runs great, warm starts running rich. i took it to a shop and they said i have....
Compression check results..

Cylinder 1... 120
Cylinder 2... 120
Cylinder 3... 100
Cylinder 4... 80
Cylinder 5... 75
Cylinder 6... 120

What do you experts think? Think MY mechanic might have missed somethingin his checks? Maybe a stuck valve or head gasket? He thinks the rebuild was crap. but why would it run great for those 2 days then start acting up?

Thanks Guys!
Chaz.

P.S. I Believe the rebuilder is OUT of business...

 

[cammeddrz]

i forget how they are numbered, i am a chevy guy so i am used to them being numbered every-other. but it looks like a head gasket failed between 4 and 5, usually it is the exact same but a 5 psi margin for error is ok.

maybe the head was warped to begin with? leading to such immediate head gasket failure? either way that head has to come off

 

[IMenriched]

It is rare that head gaskets fail in a 2.9....usually it is the head that cracks....so if they are coming off I'd have them checked before just replacing the gaskets.

you have a pretty significant drop on pressure on 4 & 5.

I might be inclined to chat with rebuilder...about warranty

 

[fordman4488]

I agree with IMenriched

 

[The Slider]

Its official!!! I drove by today and there was an empty building!

 

[IMenriched]

Its official!!! I drove by today and there was an empty building!

out of business....or...just relocated??

 

[The Slider]

no listing. disconnected and empty building. I stopped and asked the ONLY neigher they had and they didnt know them. just caome in over a weekend and they were gone. unless they changed names. how do i find that out?

 

[IMenriched]

no listing. disconnected and empty building. I stopped and asked the ONLY neigher they had and they didnt know them. just caome in over a weekend and they were gone. unless they changed names. how do i find that out?

your local county court house should have a record of business permits applications.

might be just as well....if they came on the weekend and cleared out, And no forwarding address....then there probably many other reasons besides your probable botched over haul, to pull up stakes and vanish.

All depends how far you want to press it...get a lawyer...so on , so forth. you could spend just as much trying find this fellow as you spent on the engine.

 

[The Slider]

Untill i can find a GOOD clean engine im going to take it out to my Grandmother house and park it in her garage, noone lives there anymore and it's alarmed like Ft. Knox! So i KNOW noone will mess with it and it will be outta the rain and sun... The Elements! and ill cancel my insurance and let it sit. and when i go out there ill fire it up and drive it around the property. and park it again... but im NOT getting rid of it!

 

[DisturbedMXer8]

Front
4 1
5 2
6 3

Could be a warped/cracked head in between the two. Best way is to take it apart yourself and see, or just take it back in to someone who knows what they are doing.

 

[Sasquatch_Ryda]

For a 'rebuilt' engine all of those numbers are low....

My 4.0L with 224,XXX km's on it still has over 160 on every cylinder.

What exactly was included in this 'rebuild' they did?

 

[The Slider]

Suposedly everything! LIES LIES LIES!!!!!!!!

Chaz.

 

[shaysman]

i had that happen to my other truck and the pin that holds the piston and arm together slides back and fourth and it eats the side of the cilinder. im gonna say that if you know what your doing tear the engine down or have some body you know do it for you and look at the cilinder walls and see. if its not that then check the bottom part of the engine to see if like maybe a seal was place back wards or a bolt is lose. if its not that then im afraid that youll have to buy a new engine

 

[shaysman]

ohh and the numbers are good for a rebuilt engine mine is running bout 120 across the cilinders and my truck out runs mid 90's mustangs