4&6, 3&5

Thinking of a SB Ford 302.

Yep, time to go to bed.

 

Kinda makes me wonder if shaving the heads creates more potential for failure. If I am not mistaken this raises the compression. I know SDS does measure protrusion and it can be altered by modifying the head.


.

 

And that the ringed heads may really be the right cure.

 

Randy: IIRC you had brought up some time back that the studs actually come in different strength ratings? So studs are not just studs, some may stretch just like TTY bolts, do I have that right?

xaviar: were you aware of this and do you know what you put in back when you did the job 1st time? Note Randy's sig shows H11 studs...

Just sounding out all possibilities here...

Scott

 

Do these really work?
Ford 6.0 Powerstroke Cylinder Head Shim Gasket Kit

 

They do come in different strengths. I'd curious to see if those bolts stretched. Should be simple enough, get a measurement and ask.

 

Here's a possibility, the head gaskets are still just fine

 

Stretched studs.... haven't really heard of that.

 

If a fastener is tightened more than finger tight it is stretched. Google torque vs stretch if you need a sleep aid.

 

I think the referral to stretched in this case is beyond the normal stretch used to tighten the studs to the initial torque setting.

 

Elastic deformation vs plastic deformation.

 

I sure would have liked to work with you Jack!!!

Eddy - I am hoping that you have leaking welds on the EGR cooler. I think this is at least as possible as the heads lifting again. Not sure there is a good way to tell, but I would start by looking in the intake.

BPD posted a test that they say helps discern the difference. I will post the link when I find it.


Edit - Here it is:

 

It ain't rocket science, but it is engineering.

But head bolts are not the only concern. Somewhere here or the org I recently talked about surface finish, something that often isn't appreciated with motor work, by mechanics or machine shops unfortunately. I've watched some vid where a 6.0 block is scraped clean using a square iron bar by a well respected individual as an example. That just knocks off the toothed top of the surface finish allowing for the possibility of the gasket to move horizontally during combustion, even with good clamping.

Let's hope this is just a bad weld.

 

I did not know there were different strengths. I used ARP's. I forget the part #. When I did my HG's. There was a new torque sequence released, different molly lube and 3 stage torque process. When torquing the heads it's first done at 70ft lbs, then 140ft lbs and a final torque of 210. Followed to the letter and checked twice.

As soon as the weather breaks. I'm going to pull the covers and check again. Waiting on a pressure gauge to do a drive test. Got my tee and hoses set up ready to go.

Oh, btw, I used assy lube on all studs entering the block, washers, nuts and finger tight only.

Thanks for the link Mark.

Just got home from a 100 mile trip. Popped the hood. No puking??? Anti freeze level right on my mark.

 

Think that maybe the level was to high initially?