As a mechanical inspector from the precision machining industry I would do it on a surface plate using a dial indicator to sweep the surface. You need three points on the surface to establish the zero reference plane so the indicator will read zero at three designated spots. Two on the same end in the corners and the third on the opposite end central to the head width. Mark these spots with a dot using a sharpie and orientate the head resting on three finger jacks (on the underside of the head)located roughly opposite the marked spots. When you have zero at all three spots then sweep the rest of the surface for the largest departure from the zero reference plane. The total indicator reading is flatness of the surface.
@@CUTTERUPROB agreed!…can’t spend all day on it!😆…on my ‘97 12 valve I’ve encountered hills pulling my 5th wheel where I’ve had to pull it into low and stay in the truck lane and noticed my boost wouldn’t go above 17-18psi so it lacked power…any ideas? Has a Banks power pack,straight pipe,adjustable ofv and boost elbow…no major mods.
If I had access to a calibration lab I could put it on a surface block that was calibrated to one ten thousanths and put a runout gauge on it but I do not do cylinder head work.
Also would like to know: why the seam ripper?
Had it in my pocket from a different job
Heads aluminum, block is cast. The markings on the block are just a stain from the gasket but those heads are definitely bad.
As a mechanical inspector from the precision machining industry I would do it on a surface plate using a dial indicator to sweep the surface. You need three points on the surface to establish the zero reference plane so the indicator will read zero at three designated spots. Two on the same end in the corners and the third on the opposite end central to the head width. Mark these spots with a dot using a sharpie and orientate the head resting on three finger jacks (on the underside of the head)located roughly opposite the marked spots. When you have zero at all three spots then sweep the rest of the surface for the largest departure from the zero reference plane. The total indicator reading is flatness of the surface.
Hard for the home guy to do as most don’t have good straight edge. In my experience heads should just be resurfaced and be done with it
@@CUTTERUPROB agreed!…can’t spend all day on it!😆…on my ‘97 12 valve I’ve encountered hills pulling my 5th wheel where I’ve had to pull it into low and stay in the truck lane and noticed my boost wouldn’t go above 17-18psi so it lacked power…any ideas? Has a Banks power pack,straight pipe,adjustable ofv and boost elbow…no major mods.
In my country where gas is $10 a Gallon, (was $5 when Trump was in) we never had mass production large capacity cars. Is this a Diesel or Petrol
Fire ring it.
Put a straightedge on it with feeler guages to tell how bad it is, people have been doing it for decades.
You never said how a shop checks if a head is flat.
They use a long machinist square. Usually about 1/4 in thick but 2 or 3 foot long.
@@mustangdemon87 yeah I knew that but it's the opening of the video and never explained.
video's coming
Thats what I was watching for....disappointed 😔
Ok so how does the shop check it you never did say in this video
What's with the seam ripper
Was in my pocket from a different job I was doing
Makes an effective pointer. Gives size reference to the wear.
If I had access to a calibration lab I could put it on a surface block that was calibrated to one ten thousanths and put a runout gauge on it but I do not do cylinder head work.
No offense didn't show us or tell how, just described why, and that you knew. Good info.
More videos coming
Seam ripper come in handy with electrical harnesses.
thats funny that why it was in my pocket
Thanks for the very useful information.
So you would check the block deck right?? Just because the head has been decked doesn’t mean you’ll get a good seal.
Yes you would want to as well. I need to finish this series of videos
@@CUTTERUPROB sounds good!
After sewing class
Stripping a working harness
Wow, genius tool for ripping into a harness 👌
What might be the cause after resurfacing and over heat keeps persisting..
Could be a bunch of things. Water pump / rad / t stat / air lock etc .
.....oil cooler, egr cooler.
Thanks 👍
Carefully!