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Old 10-06-2019, 05:55 PM   #1
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Default KA24E Timing componet issues

We are on the third timing component failure now. The first timing set that was installed 2 years ago during a short block rebuild, was Enginetech brand. During a unrelated second rebuild (two cylinders failed to break in and it was buring oil), we discovered at 10,000 miles it failed on the right side chain guide when the plastic guide broke off. Only that part was replaced. The second failure happened about 2000 miles in on the second rebuild. This time the head was also rebuilt. This go around it jumped time due to unknown reasons. So I ordered a whole new Melling brand timing set. Not even 30days later the same right side guide breaks the plastic off again. What can cause this to keep happening?
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Old 10-06-2019, 06:26 PM   #2
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I think it comes down to a combination of the plastic guides and the tensioner design. I had a similar failure after 4 years/14K miles using a cheapo timing set (DNJ brand if I remember correctly). Same exact failure, the plastic on the right side timing guide cracked off and slid down into the oil pan, causing the chain to rub against the metal part of the guide and make quite a racket.

The OSK timing set is what you're after. It's an upgraded version of what was in these trucks from the factory. I installed it a little over a year ago and it's been fine. Maybe a tiny bit of noise at startup but nothing to worry about. The timing chain tensioner is also not the greatest on these. There's a guy called Mr. Jim (you can look him up on youtube) that sells spacers for these along with a redesigned ratcheting-style tensioner. I haven't bought one of the spacers yet but will if the problem ever comes back.

OSK timing set:
https://www.amazon.com/Osk-W0133-189.../dp/B00449RKQA
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Old 10-06-2019, 07:48 PM   #3
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I used the Beck Arnley kit in my former 93, no problems.
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Old 10-06-2019, 09:07 PM   #4
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I second the OSK set. Over a year and no issues at all.
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Old 10-07-2019, 11:43 AM   #5
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The cheapo-brand I used first had the freeze-plug pop out of the top of the chain-tensioner almost immediately. I have pics, including the temporary fix, if interested.
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Old 10-07-2019, 05:59 PM   #6
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So you guys are leaning more toward the parts being bad than there being something wrong with the engine?
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Old 10-07-2019, 06:30 PM   #7
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Chain slack from a bad tensioner is what usually gets the guide. Did it have any start up rattle?
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Old 10-09-2019, 11:03 PM   #8
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The tensioner is new. The only rattle it had was from a dry start up after the timing set install, but went away with in a couple seconds.
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Old Yesterday, 03:09 AM   #9
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Try using nothing but OEM nissan oil filters, I'm on a mellings kit that's a year old. Something to do with not having enough oil pressure on the tensioner at start up.
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