 Valve adjuster squashed |
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| nditiz1 |
 Jun 29 2020, 02:45 PM
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#1
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Senior Member  Group: Members Posts: 1,258 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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So doing a valve adjustment i found #3 intake to be very loose. I started to adjust and then found this. Why/how did this happen?
Also, why are my leakdown tests consistently 20% leaking through the case? Rings? I did it cold and the engine looks to be rebuilt from how clean the inside of the heads were.  |
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| BillC |
Jun 29 2020, 03:05 PM
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#2
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Senior Member Group: Members Posts: 671 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region
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My guess is that you got a defective adjuster screw that wasn't heat-treated properly. It's unusual for one of those to peen over like that, especially if there's no other damage in the valve train. Maybe it got beaten up when the valve lash opened up a bit.
If the leakdown is through the case, then it probably is the rings. Could be that they haven't seated properly, or maybe they're cracked. I have a borescope for checking the cylinders, if you'd like to drive down and borrow it -- you could check for scoring on the cylinder walls. |
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| burton73 |
Jun 29 2020, 04:53 PM
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#3
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Senior member, and old dude Group: Members Posts: 3,848 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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QUOTE(BillC @ Jun 29 2020, 02:05 PM)  My guess is that you got a defective adjuster screw that wasn't heat-treated properly. It's unusual for one of those to peen over like that, especially if there's no other damage in the valve train. Maybe it got beaten up when the valve lash opened up a bit. If the leakdown is through the case, then it probably is the rings. Could be that they haven't seated properly, or maybe they're cracked. I have a borescope for checking the cylinders, if you'd like to drive down and borrow it -- you could check for scoring on the cylinder walls. I had a set of lifters that kept mushrooming because they where not heat treated. Sad story for me. They made good on new lifters but I had to split the case and rebuild on a 3,000-mile engine. Vales would go out of adjustment all the time. This was in 1978 Bob B |
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Posts in this topic
nditiz1 Valve adjuster squashed Jun 29 2020, 02:45 PM
porschetub
So doing a valve adjustment i found #3 intake to ... Jun 29 2020, 03:26 PM nditiz1 Thanks!
The valve had a slight knick on the e... Jun 29 2020, 04:00 PM
porschetub
Thanks!
The valve had a slight knick on the ... Jun 29 2020, 05:46 PM brant as an unknown (to you) motor
it might be worth doi... Jun 29 2020, 04:13 PM nditiz1 That stinks Bob.
So I put a good used one in its ... Jun 29 2020, 05:36 PM porschetub
That stinks Bob.
So I put a good used one in its... Jun 29 2020, 05:55 PM RoadGlue
Shit that's not good,looks like the pushrod r... Jun 29 2020, 08:07 PM porschetub
Shit that's not good,looks like the pushrod ... Jun 30 2020, 01:17 AM Jake Raby That valve adjuster was made of Chinadium...... Jul 4 2020, 06:26 PM nditiz1
That valve adjuster was made of Chinadium......
... Jul 4 2020, 08:36 PM |
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