13thracer Posted September 18, 2006 Share Posted September 18, 2006 sound is very much like lifters especially if its gone now it would point to lifters, would of most likely been a lifter that had not pump uped properly change your oil and filter and check the oil that comes out for any sludge or chuncky bits which may be getting caught in your lifters. little tip get your oil nice and warm before you drop it dont bother doing it cold, take your car for a good drive first. Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2506696 Share on other sites More sharing options...
GunMetalR33 Posted September 28, 2006 Share Posted September 28, 2006 (edited) Sorry to bring back a dead thread, but I have this problem and everyone seems to think its lifters. What does everyone mean by pumping up the lifters? I know they are hydrolic but I dont know there relationship with the values and cams??? I have changed my oil and filter twise in the last month but the sound is still there when the engine is cold then disapears when it heats up? Edited September 28, 2006 by GunMetalR33 Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2538799 Share on other sites More sharing options...
shanef Posted September 29, 2006 Share Posted September 29, 2006 Pumping them up refers to pumping them full of oil. What i did was took the lifters out (one side at a time) and soaked them in a bucket of new clean oil. Then replace those and see if the sound has gone away, if it hasnt do the other side. Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2539756 Share on other sites More sharing options...
GunMetalR33 Posted September 29, 2006 Share Posted September 29, 2006 OK thanks mate, I have never taken the rocker covers of the rb25 before so dont really know what to expect. So does the cam run the lifters which open the valves? How does the system come together??? Pumping them up refers to pumping them full of oil. What i did was took the lifters out (one side at a time) and soaked them in a bucket of new clean oil. Then replace those and see if the sound has gone away, if it hasnt do the other side. Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2539772 Share on other sites More sharing options...
cameron Posted September 30, 2006 Share Posted September 30, 2006 Best to take it to a mechanic if your not sure. To get the cams out, means removing the rad, harmonic balancer, timing belt etc... I problery wouldnt worrie about it inless you start getting symptoms of the engine running like crap - shouldnt happen tho. Even some times pumping up the lifters like shanef explained doesnt always work so the best option would be to get new ones if your that concerned:o Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2541804 Share on other sites More sharing options...
GunMetalR33 Posted October 11, 2006 Share Posted October 11, 2006 Sorry again for the dead thread thing but, Do you have to take the cams out to remove the lifters? And how much does a new set of hydrolic lifters set you back? I was thinking about getting some tomie cams and if you need to take the cams out to change the lifters then it might be a good excuse for the new cams Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2572773 Share on other sites More sharing options...
shanef Posted October 11, 2006 Share Posted October 11, 2006 u certainly do need to remove the cams to get the lifters out. so basically you remove the cams, grab a magnet and then using the magnet the lifters will just slide on out another suggestion. have you done ur timing belt yet? caus this would be an excellent time to change it! Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2572801 Share on other sites More sharing options...
GunMetalR33 Posted October 11, 2006 Share Posted October 11, 2006 thanks mate, Are you talking hydrolic lifters? Well I guess I will leave the lifters as is, by the sounds of it its only one of the front ones doing it and it goes away when the engine heats up. If it starts to hang around even when the engine is cold then I will looking into getting cams and new lifters then. How much are new lifters? Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2572886 Share on other sites More sharing options...
shanef Posted October 11, 2006 Share Posted October 11, 2006 yeh i was talking about hydraulic lifters. not sure how much new lifters are, give ur local nissan a ring they'll be able to tell you. oh and one last thing. with that lifter noise, is it coming from one side? or both sides? or does it change from side to side? Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2572966 Share on other sites More sharing options...
GunMetalR33 Posted October 11, 2006 Share Posted October 11, 2006 its the right hand side if you looking into the engine bay from the front of the car, so I guess the exhaust side. I dont think it changes from side to side... Why do you ask? I am a little woried about the Zaust value getting stuck closed even when cold as I am getting fuel in my oil atm which is probably due to the excesive missing that I am getting (tune issue) but a lock value could be the cause??? Why did nissan use Hydrolic lifters on an over head cam engine, the rb26's have solid ones right? Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573012 Share on other sites More sharing options...
shanef Posted October 11, 2006 Share Posted October 11, 2006 1) its the right hand side if you looking into the engine bay from the front of the car, so I guess the exhaust side. I dont think it changes from side to side... Why do you ask?2) I am a little woried about the Zaust value getting stuck closed even when cold as I am getting fuel in my oil atm which is probably due to the excesive missing that I am getting (tune issue) but a lock value could be the cause??? 3) Why did nissan use Hydrolic lifters on an over head cam engine, the rb26's have solid ones right? 1) I asked because i had the exact same noise from my RB25, but the noise ended up changing sides constantly, and then when i pulled it apart, it turns out it had bent a rod 2) I'm not a mechanic so i don't quite know the answer to that one 3) Again i'm not really sure because i'm not a mechanic Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573040 Share on other sites More sharing options...
GunMetalR33 Posted October 11, 2006 Share Posted October 11, 2006 did the bent rod sound go away when the engine heated up? Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573060 Share on other sites More sharing options...
shanef Posted October 11, 2006 Share Posted October 11, 2006 at first yes, but then it came back, switched between sides, and then got louader and louder Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573071 Share on other sites More sharing options...
GunMetalR33 Posted October 11, 2006 Share Posted October 11, 2006 few, gunMetal wipes sweat of forehead... My engine has been making this sound on and off for about a year and goes away when the engine is hot... Which points to lifters and NOT bent rod thanks again for your comments mate! Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573091 Share on other sites More sharing options...
shanef Posted October 11, 2006 Share Posted October 11, 2006 lol...ahh well then it should be right for awhile or until it gets worse no probs Link to comment https://www.sau.com.au/forums/topic/134774-engine-developed-a-weird-knocking/page/2/#findComment-2573121 Share on other sites More sharing options...
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