# DOHC Owners TSB Poll **URL:** \ **Category:** SON240sx Automotive\ **Created:** [July 11, 2005, 7:08pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118 "2005-07-11T19:08:37Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 11, 2005, 7:08pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/1 "2005-07-11T19:08:37Z")
I hear and keep reading that the “Upper Timing Chain Guide” on the DOHC KA24DE’s is an unnecessary part - in fact requiring removal as per a Nissan technical service bulletin. So who’s removed it and who’s got still got it? I’m curious…thanks. ---
**Author:** ![Alex](https://avatars.discourse-cdn.com/v4/letter/a/db5fbb/32.png) [@Alex](https://forums.speedlife.net/u/Alex)\ **Post date:** [July 11, 2005, 7:13pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/2 "2005-07-11T19:13:52Z")
just get rid of it. so easy to do and now you dont have to worry about it cracking and falling in your engine ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [July 11, 2005, 7:16pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/3 "2005-07-11T19:16:16Z")
I took mine out around 145KM but the rattle is still there and its only from the chain slapping around in the inside. FYI ![http://240sx.cubicdesign.com/images/2003/july6/camgears.jpg](http://240sx.cubicdesign.com/images/2003/july6/camgears.jpg) ---
**Author:** ![Fobwall](https://avatars.discourse-cdn.com/v4/letter/f/7ea924/32.png) [@Fobwall](https://forums.speedlife.net/u/Fobwall)\ **Post date:** [July 11, 2005, 8:18pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/4 "2005-07-11T20:18:56Z")
damn i have the stupid timing chain rattle too, i dont know if the guide has been removed though. But it sounds like the engine is gonna break sometimes. :S ---
**Author:** ![sidewaze](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sidewaze/32/5497_2.png) [@sidewaze](https://forums.speedlife.net/u/sidewaze)\ **Post date:** [July 11, 2005, 8:24pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/5 "2005-07-11T20:24:33Z")
^^^^ Don’t worrt to much about it man. It will take an awfull lot for your chain to break. It’s metal after all :lol: . Seriously though it’s not to big a deal. I think almost everyone here has had the rattle at one point or another. If your really that worried, just get it changed but it’s not gona be cheap. As for this guide thing, yeah I’ve heard it does’nt cause any damage and I’m considering doing it my self. I’ll prob remove it when I change my valve cover. ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 11, 2005, 8:52pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/6 "2005-07-11T20:52:01Z")
I think the idea of removing the upper guide is that is does NOT make it into other vital parts of the engine, SO THAT nothing bad happens (the chain may eventually eat into it/break it off due to increased chain slack over time). ---
**Author:** ![prodigy](https://avatars.discourse-cdn.com/v4/letter/p/8491ac/32.png) [@prodigy](https://forums.speedlife.net/u/prodigy)\ **Post date:** [July 11, 2005, 8:52pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/7 "2005-07-11T20:52:48Z")
Just hope the lower guide doesn’t break, as it tends to do. That one’s a BYTCH to get at on the DEs. ---
**Author:** ![kay\_arsen](https://avatars.discourse-cdn.com/v4/letter/k/ac8455/32.png) [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)\ **Post date:** [July 12, 2005, 5:52am UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/8 "2005-07-12T05:52:27Z")
i heard of ppl removing the right side guide. anyone do that ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [July 12, 2005, 10:15am UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/9 "2005-07-12T10:15:22Z")
> [@kay\_arsen](#): > > i heard of ppl removing the right side guide. anyone do that Yes, Remove both upper and right side (looking at the front of the engine) ---
**Author:** ![Jesse](https://avatars.discourse-cdn.com/v4/letter/j/c77e96/32.png) [@Jesse](https://forums.speedlife.net/u/Jesse)\ **Post date:** [July 12, 2005, 1:40pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/10 "2005-07-12T13:40:04Z")
chains are for suckers ---
**Author:** ![Uniac](https://avatars.discourse-cdn.com/v4/letter/u/34f0e0/32.png) [@Uniac](https://forums.speedlife.net/u/Uniac)\ **Post date:** [July 12, 2005, 2:49pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/11 "2005-07-12T14:49:21Z")
> [@Jesse](#): > > chains are for suckers i’ll agree on that one. ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [July 12, 2005, 2:58pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/12 "2005-07-12T14:58:52Z")
> [@lucky](#): > > [quote=Jesse]chains are for suckers i’ll agree on that one.[/quote] haha, hopefully they dont break now 😛 ---
**Author:** ![NiTeRiDeR](https://avatars.discourse-cdn.com/v4/letter/n/dfb087/32.png) [@NiTeRiDeR](https://forums.speedlife.net/u/NiTeRiDeR)\ **Post date:** [July 12, 2005, 3:34pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/13 "2005-07-12T15:34:20Z")
I have a KA24E timing chain kit for anyone who is interested. 😉 ---
**Author:** ![roast](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/roast/32/5498_2.png) [@roast](https://forums.speedlife.net/u/roast)\ **Post date:** [July 12, 2005, 3:36pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/14 "2005-07-12T15:36:30Z")
The right side guide was the problem with the SOHC motor’s. It was fixed in the DOHC but removal is recommended. ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 12, 2005, 5:30pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/15 "2005-07-12T17:30:08Z")
Thanks for all the good stuff guys… But what’s with the 5 who voted to willfully leave it there? Reasoning? ---
**Author:** ![sidewaze](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sidewaze/32/5497_2.png) [@sidewaze](https://forums.speedlife.net/u/sidewaze)\ **Post date:** [July 12, 2005, 6:31pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/16 "2005-07-12T18:31:01Z")
> [@DarkForceJackal](#): > > Thanks for all the good stuff guys… > > But what’s with the 5 who voted to willfully leave it there? Reasoning? There probabley going on the old saying, “If it’s aint broke don’t fix it!” :lol: ---
**Author:** ![Jesse](https://avatars.discourse-cdn.com/v4/letter/j/c77e96/32.png) [@Jesse](https://forums.speedlife.net/u/Jesse)\ **Post date:** [July 12, 2005, 9:05pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/17 "2005-07-12T21:05:57Z")
i took mine off my old ka a few years ago, took a thrashin and still goin strong one day ill have a fun kat ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 23, 2005, 2:14pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/18 "2005-07-23T14:14:40Z")
For those who might be wondering about doing this… I took the upper guide off the other day. Totally straight-forward job. Totally fixed the very very minor 3-second quiet rattling i’d hear sometimes from the front of the valve cover. Sure enough, there was signs that the chain was just reaching the point where it had started scraping the guide… When tightening the valve cover bolts don’t forget to use 7-11 ft lbs. and do them in order. Glad to have that thing out of my engine. She purrs. :thumright: ---
**Author:** ![Jesse](https://avatars.discourse-cdn.com/v4/letter/j/c77e96/32.png) [@Jesse](https://forums.speedlife.net/u/Jesse)\ **Post date:** [July 23, 2005, 2:21pm UTC](https://forums.speedlife.net/t/dohc-owners-tsb-poll/87118/19 "2005-07-23T14:21:50Z")
they are stupid.