January 28, 2012 at 1:18 pm #233948RickParticipant
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?January 28, 2012 at 2:57 pm #248879newkitmanParticipant
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.
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The ShackJanuary 28, 2012 at 4:03 pm #248880Scott A ChynowethParticipant
looks 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.January 28, 2012 at 10:48 pm #248881James CochranParticipant
I am with Allen, curious about the piston condition. Any pics of it?January 29, 2012 at 6:49 am #248882Scott A ChynowethParticipant
Wasn’t thinking when I posted.You can also have the divots welded and then recut the head to stock specs.January 29, 2012 at 7:35 pm #248883Steven BurkParticipant
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.January 30, 2012 at 8:00 am #248884edward ericsonParticipant
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?January 30, 2012 at 8:34 am #248885RoyalParticipant
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.)January 30, 2012 at 9:54 am #248886newkitmanParticipant
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.
VW based 53MGTD - "MoneyPenny"
"If one thing matters, everything matters" - from the book The Shack
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