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New to me 996 with coolant intermix issue

 
Old 06-20-2019, 06:55 AM
  #31  
carlvs
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Default Spring steel wire wound and magnetic.

Originally Posted by Porschetech3 View Post
Those look like remnants of a drilling process. Probably been there since manufactured. Are they aluminum or ferrous?
Definitely magnetic, not aluminum. Wire wound steel, something that would have been a part of an oil seal. I suspect that when the rear main seal was pried out that the spring remained in the case and was mangled by the rotating crank shaft!
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Old 06-20-2019, 09:45 AM
  #32  
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Wow! Hard to believe that whoever removed that seal didn't realize that there was supposed to be a spring in it (they obviously came away with only a piece of plastic/rubber on their pick). Maybe the spring fell into the case/onto the shaft, prior to removing the seal? That would most likely cause the seal to leak... Maybe the seal was pushed in to far upon initial install? Lots of questions, and I suspect many more to come. Good luck with the tear-down and subsequent build
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Old 06-20-2019, 05:34 PM
  #33  
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Today went well. I was able to borrow the cam holding tools from a fellow PCA club member and rennlist poster and was able to remove the camshafts, lifter towers and cylinder heads. I found what I think is the source of my intermix problem.






Hard to believe that a small crack can cause such a big headache!

Last edited by carlvs; 06-20-2019 at 06:06 PM.
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Old 06-20-2019, 05:44 PM
  #34  
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Originally Posted by carlvs View Post
Today went well. I was able to borrow the cam holding tools from a fellow PCA club member and rennlist poster and was able to remove the camshafts, lifter towers and cylinder heads. I found what I think is the source of my intermix problem. Hard to believe that such a small crack can cause such a big headache!
A hairline crack in one of the heads?

I had to say, something. Marked...

Please add photos and more details, if you can. We love threads like this.
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Old 06-20-2019, 05:56 PM
  #35  
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It's hard for me to believe that such a small crack can cause such a big headache!



This picture is from the number three cylinder.The crack can be felt when dragging my finger nail across it. Based on other posts I was expecting to find it on cylinder number six.
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Old 06-20-2019, 06:07 PM
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Congrats! Check with Len Hoffman. He should be able to fix this and make sure you send BOTH heads (in case there are other cracks) because you don't want to do it twice.
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Old 06-20-2019, 06:08 PM
  #37  
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Originally Posted by carlvs View Post
It's hard for me to believe that such a small crack can cause such a big headache!



This picture is from the number three cylinder.The crack can be felt when dragging my finger nail across it. Based on other posts I was expecting to find it on cylinder number six.
Thats the easy one to fix as per Len Hoffman($450) that goes from spark plug hole to welch plug. The hard one ($750) goes from spark plug hole to exhaust valve guide..
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Old 06-20-2019, 06:15 PM
  #38  
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Originally Posted by Ahsai View Post
Congrats! Check with Len Hoffman. He should be able to fix this and make sure you send BOTH heads (in case there are other cracks) because you don't want to do it twice.
Good advice and that's my plan. I'll ship them out as quickly as I can, possibly as soon as tomorrow..
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Old 06-20-2019, 06:19 PM
  #39  
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Len is very explicit on the https://newsite.hamheads.com website as to how to pack and ship the heads.
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Old 06-20-2019, 06:23 PM
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Cool man! Always awesome when you find a smoking gun!
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Old 06-20-2019, 07:22 PM
  #41  
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Originally Posted by Coopduc View Post
Cool man! Always awesome when you find a smoking gun!
I was beginning to wonder...the other head and cylinders looked fine... I would have been almost disappointed if I were to find nothing.. ;-)
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Old 06-21-2019, 08:40 AM
  #42  
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Glad you found the issue! Hopefully you’ll be back on the road soon!
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Old 06-21-2019, 04:20 PM
  #43  
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Originally Posted by bbboomer67 View Post
Glad you found the issue! Hopefully youĺll be back on the road soon!
Not soon enough John... ha ha !

Heads packed and ready to ship to Len Hoffman in Georgia.
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Old 06-25-2019, 06:13 PM
  #44  
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Busy day today,

cases split and crank housing and IMS shaft removed. Tomorrow I’ll take a look at he the main and rod bearings.




















Last edited by carlvs; 06-25-2019 at 06:26 PM. Reason: Add photos
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Old 06-25-2019, 07:46 PM
  #45  
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Ingenious use of the maxjax!
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