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1999 Caravan 2.4 L engine noise
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mechanicbynecessity
New User
Jan 2, 2013, 12:56 PM
Post #1 of 2
(1575 views)
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1999 Caravan 2.4 L engine noise
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1999 Dodge Caravan - 2.4 L engine - 100,000 miles on the current motor. Last month I replaced the motor (bad main bearings) per mechanic's suggestion. When I started the engine there was a bad oil leak around the head gasket. Replaced the head gasket - made a mistake putting the timing belt on - one tooth off - Tore it apart again noticed water leak and replaced the pump...got the timing right (I think) at least it is getting 26mi/ gallon. Upon start up I noticed some sort of knock. Drove it 1,000 miles. No break downs, oil leaks, or water leaks. The knock is louder on a cold start then gets softer as the engine warms up. To me it doesn't sound like a tap of a lash adjuster. Almost has a diesel sound to it. Not a deep engine noise- sounds like it is coming from the head.
Things I have tried- higher octane fuel to see if it was a detonation problem - (helped just a little) - changed the oil and switched to synthetic -(Helped, but not solved)
Next thoughts - bad valve? off the other way on timing? maybe it is a lash adjuster? Maybe it just needs to be timed... not sure where to go from here besides tearing it apart and putting it back together.
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Sidom
Veteran
/ Moderator
Jan 2, 2013, 8:40 PM
Post #2 of 2
(1531 views)
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Re: 1999 Caravan 2.4 L engine noise
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On something like this you are going to want to triple check those timing marks...... I've seen more 2.4s with the marks off than any other engine.....by DIYers & Techs....
There is actually 4 marks for the cam gears not just 2.....When the marks are correctly aligned you should be able to put a straight edges across all of them with all of them being in line....
Put a vacuum gauge on it. If the reading is low & shaky at idle....the marks are off....
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