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Guest Message by DevFuse
 

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HELP! ROD KNOCKING SOUND '91 Legacy


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4 replies to this topic

#1 anaphe

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Posted 17 May 2005 - 09:56 AM

Ok Now that I have your attention let me tell you about my car.

My Subaru is my winter beater and parts hauler. I don't give it much love, basically just change the oil and it never complains.

A few weeks ago I started up the car and I heard an audible ticking sound almost like rod knock but not really. Either way it scared the crap out of me. I immeadiatly turned off the car checked the oil and confirmed it was full and started the car again. Noise gone.

This am same exact situation.

Any ideas?

#2 Setright

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Posted 17 May 2005 - 10:29 AM

1991? I would assume an EJ22 engine? The sound was likely a sticky hydraulic valve lifter. If it's gone, don't worry.

(A rod knock will usually get louder as the engine oil heats up and thins out.)

#3 anaphe

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Posted 17 May 2005 - 12:41 PM

Anything I can do to free up the lifter? Change oil weight? Flush crancase?

#4 BigC

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Posted 17 May 2005 - 01:06 PM

Timing belt tensioner's can sometimes make that sound too. How may miles are on it and was the tensioner changed at the same time as the belt?

If it's a sticky lifter, sometimes it's as easy as switching to a different brand of oil. I wouldn't include Penzoil as an option if it were me...

#5 Setright

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Posted 17 May 2005 - 02:32 PM

Try a 5W-40 oil and use a genuine Subaru filter.




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