Another "why do my chambers look like this" thread
01-19-2011, 01:47 AM
#1
Another "why do my chambers look like this" thread If you look by the intake valves, there is a portion of the chamber that is clean. It almost looks like the valves are closing off-center, slapping that area, and then sliding back to center. All 8 cylinders look like this.
When I bought the heads they had valves and seals, but some of the valves were bent. I had the machine shop do a valve job and buy new valves. The first set they ordered were OEM size, and when they tried them they were too small. So they ordered some that were +.020" and used those. They were lapped but not assembled when I received them. After the fact, I measured the old valves that came out of the head and saw that they were +.060". I assume that if the +.020" valves were too small to use that the machine shop would have seen that.
I can't find the invoice from the machine shop, but I think they had to replace a couple of the valve guides too.
Anyway does this look like what I described, and how would the valves be able to move inside their guides?
When I bought the heads they had valves and seals, but some of the valves were bent. I had the machine shop do a valve job and buy new valves. The first set they ordered were OEM size, and when they tried them they were too small. So they ordered some that were +.020" and used those. They were lapped but not assembled when I received them. After the fact, I measured the old valves that came out of the head and saw that they were +.060". I assume that if the +.020" valves were too small to use that the machine shop would have seen that.
I can't find the invoice from the machine shop, but I think they had to replace a couple of the valve guides too.
Anyway does this look like what I described, and how would the valves be able to move inside their guides?
01-19-2011, 04:03 AM
#2
You need to disassemble the valve springs to check the clearance on the guides AND find a better machine shop. There are a bunch of things that should be checked and set up when doing a set of heads. Most machine shops are hacks IMO and don't have a clue. Finding someone who knows their profession today is truely a rare thing. i'm gonna give you some advice. DON"T WASTE ANY MORE TIME with this machine shop. MOVE ON!
01-19-2011, 01:59 PM
#5
Like was said, don't go back to them. Something is very obviously wrong, and now I would think there is a possibility your valves could be hurt as well. I would personally have all the guides replaced by a reputable shop (like WCCH, or TEA for example). Did they regrind everything, or just lap them all?
