Pulled the heads WTF pics*

[bezerk]

Re: Pulled the heads WTF pics*

i can't see they are able to hone it out, since you n eed to get too the bottem ass well. if your friends at ford are able to drop the pan and all, i wouldn't listen to them and stick what we know. i also doubt it's piston slap that you were hearing and those groves look to bad for tnot going over everything.

 

[Don W.]

Re: Pulled the heads WTF pics*

Not the lifters but the retainer is different from stock.

X2 on the Ford comments. I'm sticking with my comments. Remember, I'm going only by the pics. None of us are there to actually see the motor.

"Piston slap" doesn't sound the same as a bad lifter. To me piston slap is rare. I'd be more inclined to think that kind of noise would be either a bearing or a loose lifter. Maybe I missed it but has the noise been described?

 

[The Devils Own Chariot]

Re: Pulled the heads WTF pics*

It sounds just like this. It seems to fade in and out based on RPMs.
http://www.youtube.com/watch?v=ikmJ4-RcGDw

 

[dgoodhue]

Re: Pulled the heads WTF pics*

Thanks guys. This is all very strange. Looks like I bought a lemon. What makes you guys think the lifters are not stock? Im not following.

The metal stock lifter hold down in the middle of your engine is suposed to look like this.

 

[bezerk]

Re: Pulled the heads WTF pics*

if it was lifter noise why did you just tear it all apart and not trying to find your problem with the valvecovers off and try to sort out wich one it was? right now you are in a situation were you need to replace it anyway not knowing it was your problem.

 

[dgoodhue]

Re: Pulled the heads WTF pics*

if it was lifter noise why did you just tear it all apart and not trying to find your problem with the valvecovers off and try to sort out wich one it was? right now you are in a situation were you need to replace it anyway not knowing it was your problem.

He mention that he cross threaded a spark plug. My guess is that he is replacing the head while he has the intake off to replace the lifters.

 

[The Devils Own Chariot]

Re: Pulled the heads WTF pics*

He mention that he cross threaded a spark plug. My guess is that he is replacing the head while he has the intake off to replace the lifters.

Right. I just really wanted to see everything going on with the motor also. I might get some head work done. I know the vortecs are double the flow of the stock heads but I dont think Im ready for that money yet. I would really like them but I need to draw the line on how far I go. One thing leads to another.
I did try and listen to what lifter was bad. I could not pin point it. Does not matter to me. Im going to replace them all.
I did cross thread a plug. Im taking it off to get it fixed right. I dont want to always question that plug or get metal in the cylinder retapping it.

 

[TYTILIDIE]

Re: Pulled the heads WTF pics*

May as well go to Vortecs now:lol: That video you posted definitely sound like a lifter. Piston slap almost sounds like a light rod knock.

 

[TYTILIDIE]

Re: Pulled the heads WTF pics*

Is this a stock ty motor or was it rebuilt before? I ask because of the spider that holds the lifters, that's not a stock one.. Unless the older year motors have that.. ??

I noticed that too and thought damn, how come mine didn't look like that, thought maybe it was a Syclone thing. How many miles are on your truck, looks like maybe your motor has been opened.

 

[MikeRenz]

Re: Pulled the heads WTF pics*

the lifter spider you have is for balance shaft motors...which is what most stock rebuild places would have on hand. (although why they'd ditch the original one is beyond me)

Why did you remove the head in the first place? A little excessive for replacing lifters. Also, your Ford friends aren't used to our crappy gmc setup and don't realize that you aren't going to be honing that cylinder without removing the motor - unless of course you intend on removing the front diff (which is kinda dumb for something like this)

 

[#0441]

Re: Pulled the heads WTF pics*

I've never seen the lifter hold down of a 4.3 with a balance shaft, but that's what I'd imagine it would look like. That was the first thing that caught my eye. I've never seen one like that.

 

[TYTILIDIE]

Re: Pulled the heads WTF pics*

Thing with the vortecs is that weather or not you run a cam you will no longer be detonation PRONE. Not saying you cant knock but it wont be anywhere near as bad. On my build I was shocked I never saw 1 single degree of knock, even on a few lean spots in my initial tune. I would personally tear down the motor. You have til spring right? Just do a real mild build, shouldn't cost you more than 2k.

 

[bezerk]

Re: Pulled the heads WTF pics*

you will have to take out the engine anyway. if you are going to run vortecs you need to redo your intake anyway. why not spent the last few on a good build instead of running back and forth with a cutt of edged block to begin with. ''needs new heads', new rings, hone, new bearing, be happy to safe cash but it will cost you more in the long run''

 

[blk00z28]

Re: Pulled the heads WTF pics*

The lifter spider. The different years took different spiders. The style you post has the bolt holes on the outside of it and was designed to clear the balance shaft.., vs center like Dave posted. (and is in my picture in this post below) Which means your block accepts those bolts there. Meaning its a later block.. Can you get a picture of the front of the block without the timing chain cover on? Might want to get the number off the block and post it up too..

Were you able to actually pull one of the head gaskets completely off without ripping it at all, or it separating? I ask because it doesn't look like the factory one.. At least not the factory one I had on my motor. Mine doesn't have the holes for the coolant like yours. And it has the triangle area on the ends that extend up where the top of the head is.

Mine:

Who'd you buy your truck from?

 

[The Devils Own Chariot]

Re: Pulled the heads WTF pics*

Yeah it all came off in one peice except for the outer surface of the gasket is still on the heads and block.

Uhhh..... It never ends with this truck. :roll:

 

[Foot Performance]

Re: Pulled the heads WTF pics*

Also, your Ford friends aren't used to our crappy gmc setup and don't realize that you aren't going to be honing that cylinder without removing the motor - unless of course you intend on removing the front diff (which is kinda dumb for something like this)

I would have to agree with that I dont think even if you could you would want to do it in the truck. I would just pull it put a fresh it up and you will be happier in the long run.:2cents:

 

[MikeRenz]

Re: Pulled the heads WTF pics*

the cylinder wall is messed up and your gut thinks its fine?

you are 1/3 stripped and ready to remove the motor. You're planning on running high boost in the spring. Making more is what points out flaws in your build. You're simply asking to blow up. If you're worried about your budget at all...don't bother with vortecs-especially since/if you'll need a new bottom end soon. Find yourself some L35's instead, people have made good power with them.

 

[TYTILIDIE]

Re: Pulled the heads WTF pics*

There are no shortcuts, here. Once again, my experience has been that engines generally don't tolerate short-cuts. They respond by failing again in short order.

Good luck. But take it apart.

Aint that the truth.

 

[turbodig]

Re: Pulled the heads WTF pics*

Those horizontal scores in #4 are nasty, and unusual. I think your Ford guy may be right. Piston slap. But it could be ring activity, also. There is also heavy vertical scoring in #4.

"Collapsed Lifter". With due respect, I don't think so. Unless a lifter has come apart, they do not "collapse". They are very reliable. Especially in engines that only rev to 4,500 RPM. A valve that is out of adjustment, too loose, and therefore making noise will make that noise all the time, and will not "come and go with increase in RPM". Valve train noise is also 1/2 Crankshaft speed in frequency. Takes a trained ear to hear the speed difference, but valve-train noise is 'slow'. Modern GM OHV engines don't have trouble with lifters.

It's hard to tell from the picture... are they horizontal scores, or *cracks*?

Slappy pistons on a rebuilt aren't terribly unusual... the rebuilders aren't gonna be checking bore clearances too well. This may have been what caused the scoring as well... too *tight* of a clearance on #4- I'm with Don on that.... it got too hot for the clearances that it had. Hot-lapping at the drag track can do
this as well.

This is why you can't trust a mass-build rebuilt motor in a turbo application. Clearances *matter*.

It doesn't matter, really, in this case since you need to pull the motor. It won't run well like that.

*EDIT* Check your block VIN... see if it matches the truck.

 

[The Devils Own Chariot]

Re: Pulled the heads WTF pics*

Ok. Thanks guys. I apperciate everything. I have a long raod ahead of me.