 Is this 2-Liter Cylinder Head Any Good?, Has pitting, can it be fixed? |
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| jjs3rd914 |
 Jul 1 2008, 07:56 PM
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Member  Group: Members Posts: 124 Joined: 8-August 04 From: Sarasota, FL Member No.: 2,476  |
We got a 1973 GA series 2-liter motor that had low miles but sat for a long time. The pistons and cylinders are gone, crank probably just needs ground, case is good, the 039-101-371A cylinder heads look great EXCEPT for one of the chambers. It is badly pitted from corrorsion.
Can it be used as is? Is there anyway to repair it without costing a small fortune? As one can see there are no usual cracks showing. We want to rebuild the motor and replace the 1.7L in our 1972. I have the 2-liter injection system and want to keep it mostly stock. We will have to replace the pistons and cylinders. Any recommendations on which ones to buy? I would like to end up with about 100+ HP. Thanks jjs3rd914    |
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| Jake Raby |
Jul 1 2008, 08:22 PM
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
..and the good chamber is cracked as well.. I can see the crack going into the plug threads plain as day. The "bad" chamber is also cracked.
All that pitting is called exfoliation. It is the most harmful form of aluminum corrosion... a 1/4" square portion of that will down an aircraft until its repaired. Thats how bad it is.. That deterioration will effect chamber size as well as cause some hot spots during combustion.. It will also make the chamber significantly weaker and more prone to cracking. It looks like water sat in that bore for a long time... Water really makes this form of corrosion go wild.. and those seats must be replaced, they are also pitted. I'd use this one as a book end... |
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| Cevan |
Jul 2 2008, 12:57 PM
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
QUOTE(Jake Raby @ Jul 1 2008, 10:22 PM)  ..and the good chamber is cracked as well.. I can see the crack going into the plug threads plain as day. The "bad" chamber is also cracked. All that pitting is called exfoliation. It is the most harmful form of aluminum corrosion... a 1/4" square portion of that will down an aircraft until its repaired. Thats how bad it is.. That deterioration will effect chamber size as well as cause some hot spots during combustion.. It will also make the chamber significantly weaker and more prone to cracking. It looks like water sat in that bore for a long time... Water really makes this form of corrosion go wild.. and those seats must be replaced, they are also pitted. I'd use this one as a book end... I can't see the cracks. Could you describe where they are? |
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Posts in this topic
jjs3rd914 Is this 2-Liter Cylinder Head Any Good? Jul 1 2008, 07:56 PM
kwales Ugh, it's down in the plug threads. That wil... Jul 1 2008, 07:59 PM
jjs3rd914
Ugh, it's down in the plug threads. That wi... Jul 1 2008, 08:10 PM scotty b
Ugh, it's down in the plug threads. That w... Jul 1 2008, 08:12 PM scotty b A Mothers power ball will polish that crap right o... Jul 1 2008, 08:08 PM HAM Inc The head can be repaired, but it will require a fa... Jul 2 2008, 08:30 AM jjs3rd914
The head can be repaired, but it will require a f... Jul 2 2008, 10:36 AM Cap'n Krusty Just because you can't see cracks in the other... Jul 2 2008, 11:27 AM Jake Raby
Just because you can't see cracks in the othe... Jul 2 2008, 12:01 PM McMark Crackage Jul 2 2008, 01:07 PM jjs3rd914 Here are some additional photos. Many years ago I... Jul 2 2008, 02:33 PM HAM Inc Unlike water-cooled heads, air-cooled heads can ru... Jul 2 2008, 03:03 PM Thomas J Bliznik
Unlike water-cooled heads, air-cooled heads can r... Jul 2 2008, 08:31 PM Jake Raby
Tyhats the first one I saw.
these heads crack i... Jul 2 2008, 03:12 PM Smitty911 To much dye and than to much developer. After the... Jul 2 2008, 08:05 PM Jake Raby Len created those LE 180 CNC 914 heads that you pu... Jul 2 2008, 09:15 PM Thomas J Bliznik
Len created those LE 180 CNC 914 heads that you p... Jul 2 2008, 10:20 PM Jake Raby NO!
For some reason lots of people confuse Len... Jul 2 2008, 10:30 PM |
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