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willysmjeeps.com :: View topic - M38A1 engine diagnostic tests
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M38A1 engine diagnostic tests
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wesk
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Joined: Apr 04, 2005
Posts: 16247
Location: Wisconsin

PostPosted: Tue Mar 16, 2021 11:11 am    Post subject: Reply with quote

You bring the engines #1 piston TDC on it's compression stroke. If the rotor is not pointed at the 7 O'clock position the oil pump/distibutor are not indexed properly. If #1 plug wire isn't located at the 7 O'clock position the plug wires are not arranged correctly as well.

The TM 9-8014 illustration of the plug wire arrangement was incorrect and was corrected by a change to the manual.



If the cam was 180 out then the engine would not run at all.
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45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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