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Old 10th April 2011, 12:58   #1
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Default Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

hi friends,
i have picked up a 1952 cj3a with a peugeot engine.the engine was
overhauled and all the mountings including the four wheel gearbox
have been changed.there was an strong vibration from the
engine even at idling which still persists.what can be the cause
and the remedy for this. suggestions welcome.there is an excessive
knocking also from the engine.it has a CAV pump which has been
serviced alongwith the injectors. suggestions welcome.
regards.

Last edited by hps aulakh : 10th April 2011 at 13:03. Reason: additions
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Old 10th April 2011, 14:04   #2
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Default re: Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

Quote:
Originally Posted by hps aulakh View Post
hi friends,
i have picked up a 1952 cj3a with a peugeot engine.the engine was
overhauled and all the mountings including the four wheel gearbox
have been changed.there was an strong vibration from the
engine even at idling which still persists.what can be the cause
and the remedy for this. suggestions welcome.there is an excessive
knocking also from the engine.it has a CAV pump which has been
serviced alongwith the injectors. suggestions welcome.
regards.
Cylinder balancing is NOT OK. get the injectors checked again for balancing and adjusted for equal pressure in all four. or if it is done recently, add some engine oil to the diesel and take it for a long drive. it will reduce knocking.
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Old 11th April 2011, 08:20   #3
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Default re: Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

before you do anything get the pump delivery pipes to the ngine checked if your mechanic has not connected them to the cylinders in the correct order, the fuel would be deliverd to the wrong cylinder at the wrong time, which leads to heavy knocking and a lot of noise.
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Old 11th April 2011, 09:53   #4
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Default re: Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

@motocamp: IMHO would that have been the case the engine would not start.

Check cylinder compression and injectors. If all are not equal then the engine would be running rough. Also make sure that the exhaust pine etc are properly "hung" and not touching the body.

Do post here the solution that works.
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Old 11th April 2011, 10:04   #5
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Default re: Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

Quote:
Originally Posted by hps aulakh View Post
hi friends,
i have picked up a 1952 cj3a with a peugeot engine.the engine was
overhauled and all the mountings including the four wheel gearbox
have been changed.there was an strong vibration from the
engine even at idling which still persists.what can be the cause
and the remedy for this. suggestions welcome.there is an excessive
knocking also from the engine.it has a CAV pump which has been
serviced alongwith the injectors. suggestions welcome.
regards.
Hi HPS,

Please check
1) T-Case Mount (Cross-Bolt)
2) Engine/FIP Timing and Idling Speed.

Regards,

Arka
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Old 11th April 2011, 17:31   #6
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Default Re: Engine vibration in a '52 CJ3A Jeep with Peugeot powerplant

this engine originally was fitted with a MICO FIP,which was changed to a CAV FIP.i dont think that should be a cause for the knocking.any way like you suggest i am going to get the injector pressure checked.shall get back with the result.theexhaust is fitted with rubber brackets.
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