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Unread 04-13-2012, 04:14 PM   #1
tdorsey10
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1981 CJ5 
 
Join Date: Apr 2012
Location: Greenwood, sc
Posts: 8
Casting number help

I have a 1981 Jeep cj 5. I went to replace the valve cover gasket and discovered that the holes do not line up. After further investigation it looks like this is not the original motor. I think it is a later model engine. a 4.2 liter straight 6 cyl. I found this casting number 509013 can anyone tell me info. on this engine? I need a new valve cover that will fit? help please I need to Ride!!

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Unread 04-14-2012, 05:30 AM   #2
Jami
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1973 CJ6 
 
Join Date: Jan 2002
Location: Memphis, TN
Posts: 246
What is the valve cover made of(the one on there)? If it is plastic the early YJs came with them. I believe they can only be replaced with another plastic cover.
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Unread 04-14-2012, 10:54 AM   #3
1986cj
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1986 CJ7 
 
Join Date: Dec 2007
Location: Denver Colorado
Posts: 1,873
You are missing a number. Should have 7 digits. Look for the date build code. Passenger side of the block behind the dist look for a flat pad, it will be stamped there. Report back with the numbers and the letter. 81 block casting # 3235444 but that is for a 81-85 and a 86 and a 87-89, but there are some differences in the blocks even with the came casting #.
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Unread 04-15-2012, 07:13 PM   #4
tdorsey10
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1981 CJ5 
 
Join Date: Apr 2012
Location: Greenwood, sc
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the one on there now is metal. 509013 is on the side of the motor below the valve cover, it has 86 on the other side near the top of the motor.
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Unread 04-15-2012, 07:15 PM   #5
tdorsey10
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1981 CJ5 
 
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Location: Greenwood, sc
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this is the only number on that flat pad? it has 86 on the other side near the top? any ideas?
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Unread 04-15-2012, 11:08 PM   #6
1986cj
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1986 CJ7 
 
Join Date: Dec 2007
Location: Denver Colorado
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Are you sure the second "O" is not a "C" ?
5= 1985
09=September
C= would mean it is a 258
13=13th day of the month
This is stamped in the flat pad. It is not a casting right?
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Unread 04-17-2012, 06:26 AM   #7
tdorsey10
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1981 CJ5 
 
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Location: Greenwood, sc
Posts: 8
stamped correct, it could be ill take a better look. Thanks you may have solved the puzzel. ill let u know,
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