Misaligned cylinders?

[DSM_munky_man]

So took the head off to do a headgasket and found that cylinders 1 and 4 are not with eachother. they move the same and go up and down with no play, but cylinder 4 is alot higher and comes up a lot more. Why is this? It ran fine besides getting a little hot too fast due to the coolant leak at the HG. That was on cylinder 1. Here are some pics.

 

[GRAVEDIGGER]

It's pretty hard to tell from your pictures that there is even a difference. How far is the top of the piston from the top of the block in cylinder 1 compared to cylinder 4? How much is "a lot more"?

 

[DSM_munky_man]

Well cylinder one goes up to that miscolored ring and then cylinder 4 goes few thousands above the deck surface.

 

[ziggo0]

If you look closely you can tell the difference is about the size of the carbon ring. You may have a bent rod sir.

 

[GRAVEDIGGER]

So you're saying that on cylinder 4 there is no ring at the top of the cylinder like the others and it actually comes up past the deck surface?

 

[BigBeans]

Whoa, that's not supposed to happen.

Pull the oil pan and start looking at the rods/bottom end.

 

[ziggo0]

So you're saying that on cylinder 4 there is no ring at the top of the cylinder like the others and it actually comes up past the deck surface?

Cyl 1 comes up to the deck surface. Cyl 4 doesn't make it all the way up to the deck surface, it's about a carbon ring shy of meeting the deck surface when the other piston is at deck surface. Picture hurts my brain almost

nvm now I'm confused. One goes above the deck surface?

 

[DSM_munky_man]

So you're saying that on cylinder 4 there is no ring at the top of the cylinder like the others and it actually comes up past the deck surface?

Yes, but weird hint is all the others go up to the carbon ring hen back down, so I am not thinking bent rod, cylinder seems to be longer? :S

 

[DSM_munky_man]

Cyl 1 comes up to the deck surface. Cyl 4 doesn't make it all the way up to the deck surface, it's about a carbon ring shy of meeting the deck surface when the other piston is at deck surface. Picture hurts my brain almost

nvm now I'm confused. One goes above the deck surface?

And yes, number four goes above it hut by very little, but still does.

 

[thomcasey]

Sounds like a bent wrist pin? If it is stretched down towards the crank, it will push it higher

 

[donniekak]

What is the position relative to the deck of 2 & 3, at tdc?

 

[BigBeans]

It's hard to tell in the pics, but it looks like there is also scoring on the wall of cyl 3.

Either way, it's definitely time to rip the bottom end apart.

 

[DSM_munky_man]

@ Donnie, iirc they come up just to the carbon ring as well. I will take another look when I get home to verify, if your not busy you can also stop buy and take a look in person. I will be home around 1.

@ BigBeans, there is a little scuffing front and back of the cylinders where it usually wears, not sure exactly how bad mine is, but it is in normal wear zones.

Was hoping not to hear to tear into the bottom end, his is, well was, my dd and currently am negative money so wouldn't be able to fix it anytime soon anyway. Only reason I got Around to doing the headgasket Is a buddy had spare stuff he let me have.

 

[dsmrollerz90]

Was the motoro ever rebuilt before you owned it? Maybe they scrapped it together?

 

[DSM_munky_man]

Was the motoro ever rebuilt before you owned it? Maybe they scrapped it together?

That was my thought, it seems as it has cause it was Painted and the head had a void if removed stamp ring on it. And looked real clean. So with what I just found it is up in the air. I have a thing of receipts I will see if I can sift throuh and find any receipt for a rebuild.

 

[brian9397gsx]

Eitherway the problem lies in the bottom end, whether it be a bent rod or wrist pin to fix this problem your gonna have to tear it down.

 

[TurboAnything]

That is a bent rod for sure! If the pin was bent then the piston would be messed up and the cylinder wall would have marks on it and the motor would not sound good.

 

[DSM_munky_man]

Ya hmmmm, doesn't make sense that a bent rod would make it be longer? I will check again and make sure how far the others come up compared to these ones.

 

[DSM_munky_man]

And just to add, it ran great before this and had no knocking or pinging sounds of anything hitting. Purred like a kitten a idle and roared all the time.

 

[TurboAnything]

The piston is supposed to come all the way to the top #1 looks like it is below the deck surface and #4 looks to be right at deck hight.

 

[DSM_munky_man]

Oh damn, so then it is possible it's a bent rod, more than likely I guess. What all bends rods? Never been hydrolocked in my possession.

 

[BigBeans]

Oh damn, so then it is possible it's a bent rod, more than likely I guess. What all bends rods? Never been hydrolocked in my possession.

Knock, or hydrolock before you owned it.

 

[DSM_munky_man]

how bad of knock? Cause i never had really bad knock enough to make noise or anything. It must of been before me if thats the case. but it could be me depending on the knock,

 

[dsmrollerz90]

Damn that sucks.. I hope it's not bent.

 

[2GbTalonGuy]

You are looking at a rebuild my friend. Sorry to hear about the money situation. Hopefully you can piece it together relatively soon.