A Question about piston rings

[TracOwner]

I'm looking toward buying a car from this one guy who is selling his car at an affordable price. The problem with the car's engine is that the piston rings have to be replaced since "Blowby" is occuring.
Is it wise to go ahead and get the car or is the car messed up since the pison rings need to be replaced. Would the car's engine blow sooner or later if the rings aren't replaced?

 

[Bostedquest]

I'm looking toward buying a car from this one guy who is selling his car at an affordable price. The problem with the car's engine is that the piston rings have to be replaced since "Blowby" is occuring.
Is it wise to go ahead and get the car or is the car messed up since the pison rings need to be replaced. Would the car's engine blow sooner or later if the rings aren't replaced?

What I would do...
get the car.
Brace the engine and pull the cross brace under the car.
This will allow a clear shot to the oil pan.
Pull the pan, the head and then the pistons.
Replace as needed.
Put back togeather.
yes a lot of trouble, and a big PITA, but you'd be better off replacing them now and save what life the engine has left until you do the full rebuild.

 

[TracOwner]

I see. So the engine would eventually blow if this isn't fixed? The guy claims that he's running 16psi without any problems.

 

[Bostedquest]

I see. So the engine would eventually blow if this isn't fixed? The guy claims that he's running 16psi without any problems.

It will not "blow" just comp[ression would continue to deminish untill it has none. As well as the pistons "could" begin to move laterally in the walls, scoring them. And that would FORCE a rebuild.

It is nothing major by anymeans. If you want to hold off on the rebuild/rering turn the boost down to around 8-10 and it would increase the ring life tremendously.

 

[TracOwner]

It will not "blow" just comp[ression would continue to deminish untill it has none. As well as the pistons "could" begin to move laterally in the walls, scoring them. And that would FORCE a rebuild.

It is nothing major by anymeans. If you want to hold off on the rebuild/rering turn the boost down to around 8-10 and it would increase the ring life tremendously.

The guy did a rebuild already. He port and polished the head and put some aftermarket rods. So..........

 

[Bostedquest]

The guy did a rebuild already. He port and polished the head and put some aftermarket rods. So..........

if he already did a rebuild, why are the rings bad already?
that sounds fishy to me.

 

[TracOwner]

He sais he only rebuilt the head.

 

[Bostedquest]

He sais he only rebuilt the head.

Then that is not a "rebuild" that is a head job. (get oyur mind out of the gutter it's not THAT kind of head job )

Just do above, or do a rebuild.

 

[unior]

DO DO DO a compression test before you buy the car. If you get results under 140psi then you better not be paying much for this car. If its bone stock I would say $500.