- This topic has 8 replies, 7 voices, and was last updated 12 years, 10 months ago by
.
-
Posts
-
While I’m waiting on my engine case to be line bored I decided to take a closer look at the heads to see what kind of condition they were in.
Besides the fact that they are not the same head I found this.
Any idea what might have caused this?
Also, is it even reusable?
It’d be interesting to see the top of the piston that goes with that head. It’s possible that a small nut or screw fell through the throat of the carb and got into the cylinder. Too large of a diameter to be plug related. Should be reusable but you’ll have to do a little smoothing out where the cylinder barrel slips into the head. It appears there’s a slight indent in one of the holes that could interfere with a good tight fit.
Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shacklooks like a ball bearing was slammin around til it finally got pushed out the exhaust valve.
The area can be recut to smooth the chamber,but you should have all 4 chambers done the same to keep compression even.
Wasn’t thinking when I posted.You can also have the divots welded and then recut the head to stock specs.
My first thought was “woodpecker.”
Were there any feathers seen blowing out the exhaust?
If not, then the small nut/ball bearing theory might be my first choice.Does anyone else think this head is toast? How does the price of getting someone careful to weld, grind and polish that combustion chamber (so you don’t have hot spots) compare to buying a new head?
I’m with you Ed. Lets not forget that 1oldbuzz is/was a welder (and my guess is a very good one). I wouldn’t sleep well at night if I had this head (repaired) in my engine. I’d be surprised it a new head didn’t end up being cheaper than weld repair and recutting all 4 cyl. Without looking very hard I found heads new $250dp(EMPI) and $125sp rebuilt. Plus, I don’t know a welder or machinist around here that I would trust to do it.
(Looks like a BB to me.)
Looking atb the photos again I notice that the one valve is diferent than the others (coloration etc). Only because what WAS in there banging aroung finally came uot, it may have done some damage to the valve area underneath the valve seat that you can’t see. If you are purchasing a rebuild kit anyway go for a kit that includes the new cylinder heads. In the long run that may be the least expensive compared to a single new head and welding, machining.
Allen Caron
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack
- You must be logged in to reply to this topic.