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> Dropped a valve seat...what's the verdict?
billh1963
post Aug 15 2016, 04:29 PM
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Way back in August 2013 I went to start my 914 and heard a funky noise. I immediately shut it down. Using my limited mechanical knowledge (and a tremendous amount of luck) I postulated that I had dropped a valve seat.

Three years later I decide it's time to get this 914 back on the road. Pulled the heads and, sure enough, a dropped valve seat. Prior to the issue the car was running good...no smoking, seemingly good oil pressure, etc.

I'm hoping I can get by with just rebuilding the head (if possible). Anyone see anything that would cause me to deviate from this plan of action?

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HAM Inc
post Aug 15 2016, 06:43 PM
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The seat drop repair alone is not so bad, as far as consequences to the casting's integrity. But the crack out the exhaust port is a real killer for the T4. It can be repaired, (done it countless times over the past 20 years) but the casting will never be the same.

Time to stick a fork in that one.

BTW, those cracks were really common on smog heads. Is your head one of them? Just curious.
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billh1963
post Aug 15 2016, 06:45 PM
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QUOTE(HAM Inc @ Aug 15 2016, 08:43 PM) *

The seat drop repair alone is not so bad, as far as consequences to the casting's integrity. But the crack out the exhaust port is a real killer for the T4. It can be repaired, (done it countless times over the past 20 years) but the casting will never be the same.

Time to stick a fork in that one.

BTW, those cracks were really common on smog heads. Is your head one of them? Just curious.


It's from a '74 2.0. I don't know if the heads are original or not.

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billh1963   Dropped a valve seat...what's the verdict?   Aug 15 2016, 04:29 PM
Mike D.   I did the same thing back in 2000. Had the head re...   Aug 15 2016, 04:36 PM
ConeDodger   I see at least two and maybe three cracks in that ...   Aug 15 2016, 04:46 PM
billh1963   I see at least two and maybe three cracks in that...   Aug 15 2016, 04:54 PM
porschetub   I see at least two and maybe three cracks in that...   Aug 15 2016, 05:05 PM
porschetub   Oh dear the head is scrap ,not worth the repair co...   Aug 15 2016, 05:01 PM
billh1963   Oh dear the head is scrap ,not worth the repair c...   Aug 15 2016, 05:08 PM
r_towle   Depending upon your finances I would suggest you b...   Aug 15 2016, 06:04 PM
76-914   Is that piston cracked above the indentation?   Aug 15 2016, 06:13 PM
billh1963   Is that piston cracked above the indentation? I...   Aug 15 2016, 06:27 PM
HAM Inc   The seat drop repair alone is not so bad, as far a...   Aug 15 2016, 06:43 PM
billh1963   The seat drop repair alone is not so bad, as far ...   Aug 15 2016, 06:45 PM
ConeDodger   The seat drop repair alone is not so bad, as far ...   Aug 15 2016, 07:47 PM
HAM Inc   The seat drop repair alone is not so bad, as far...   Aug 16 2016, 09:29 AM
Philip W.   Looks like you will be building that 2056 --- you ...   Aug 15 2016, 08:08 PM
Toast   I've had a valve seat embedded in a head befor...   Aug 15 2016, 11:40 PM
cwpeden   And don't use head gaskets. I used them for th...   Aug 16 2016, 12:40 AM


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