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Engine ? |
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b00sted 
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Joined: Mar/21/2023 Location: 31820 Status: Offline Points: 12 |
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 Topic: Engine ?Posted: Mar/23/2023 at 5:53am |
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How can I tell a 304 from a 360 when in the vehicle? I have a new to me Jeep J10 and the PO said he did not know.. It is an 1985 has the 727 behind it.
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cone
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Joined: Apr/17/2010 Location: pennslyvania Status: Offline Points: 568 |
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Posted: Mar/23/2023 at 5:58am |
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The only way I know of is the get underneath it, the engine will have 304 or 360 cast on the side of the block. I think it is just behind the engine mounts
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1987 J20, 87 Grand Wagoneer,70AMX,
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Ken_Parkman
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Joined: Jun/04/2009 Location: Ontario Status: Offline Points: 1814 |
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Posted: Mar/23/2023 at 6:35am |
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I'm told some of the later one's had 5.9 (as in litres which is a 360) but dunno when that happened. A stock V8 in 85 would have been a 360.
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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Posted: Mar/23/2023 at 9:27am |
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The 5.9l was 1991 only, but some with later 1990's have also reported the 5.9l casting.
The other thing to mention is that the J10 had the optional 401 in 1985. One just sold near me but they wanted way to much for a truck that needed the frame repaired. The original 401 was what they were asking the big $ for.
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purple72Gremlin
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Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16611 |
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Posted: Mar/23/2023 at 3:47pm |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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Posted: Mar/23/2023 at 4:37pm |
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Stand corrected, 79 was when the 401 was discontinued. Must have been a transplant, though quite a popular one as I've seen just as many 401's in J10 - Honcho's and Gladiators as AMC cars.
There are also at least 5 Scouts with 401's near me that are transplants. Still something to look for and a nice find if you do get one. |
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b00sted
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Joined: Mar/21/2023 Location: 31820 Status: Offline Points: 12 |
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Posted: Mar/23/2023 at 5:46pm |
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Side of block behind the motor mount on drivers side has no stampings...
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Heavy 488
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Joined: Apr/27/2019 Location: In the Status: Offline Points: 3553 |
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Posted: Mar/23/2023 at 5:52pm |
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Not a stamping. 3 large raised numbers cast on both sides.
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Trader
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Posted: Mar/23/2023 at 6:03pm |
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It should have numbers as Heavy has stated like this in these locations:
https://www.jeepforum.com/threads/amc-360-with-a-5-9l-casting-help-me-identify-this-please.1517553/
It should be 5.9, 360 or possibly 304 or 401. If it's completely blank and no signs of the numbers being ground off, then it's likely an early Service Block - rare animal. |
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b00sted
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Joined: Mar/21/2023 Location: 31820 Status: Offline Points: 12 |
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Posted: Mar/23/2023 at 8:10pm |
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I will post a pic in the morning....
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Trader wrote: