Valve Guide = Noisey Chatter?

Information on the naturally-aspirated KA24E and KA24DE engines.
HKSdrift3r
Posts: 228
Joined: Thu Apr 21, 2005 11:44 am

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ok so i still have issues after months of down time and money. all started when the car (s14 manual ka24de obd1, 43K) began making loud noises from the motor. I figured the tensioners went out so my mechanic from nissan replaced the entire timing components with all OEM stuff; both timing chains, tensioners, and revised guides. The car ran much better and smoother bc it turns out the timing was off by a tooth, but the noise is still there. from idle to redline, its like a loud chatter, metal on metal noise that increases with the rpm's and even louder when letting off the gas. So today we decided to see if the valve lash was off and the 1st exhaust valve on the no. 2 cylinder was quite significant. Took the cam off and there was side to side movement. He said that it is the valve guide and that i need a new head, better yet and cheaper, a used motor. Im not trying to argue with him because he always wins but do I have any other alternatives? any one with a similar problem? please throw ideas at me?

thx, George!!



HKSdrift3r
Posts: 228
Joined: Thu Apr 21, 2005 11:44 am

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okk so lemme rephrase the questions then:1. has any one before broken a valve guide?2. what kind of noise does the motor make then if it is broken?3. Would adding more shims to the "lifter" quiet it down or make things worse?

thx again, George!


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KFL
Posts: 656
Joined: Tue Oct 08, 2002 5:57 am
Car: S14
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HKSdrift3r wrote:okk so lemme rephrase the questions then:1. has any one before broken a valve guide?2. what kind of noise does the motor make then if it is broken?3. Would adding more shims to the "lifter" quiet it down or make things worse?

thx again, George!
1.My friend ALMOST did, we popped the valve cover off to remove the top guide upon removal of bolts the guide was in 2 pieces literally held together by bolts.2.metal on metal. guide hits up against valve cover slightly, left a few scuff marks3.I would check the guide first..adding shims my guess would be ideal if your clearances are off, have to check the specs on that,check with feeler gauge.

HKSdrift3r
Posts: 228
Joined: Thu Apr 21, 2005 11:44 am

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well im not talking about the chain guide but the actual vlave guide/stem. what ever the case i decided to get a used motor b/c the cost of rebuilding the head isnt too cost effective right now.


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