JAM/OEM lifter question
you would def know if it was rid knock if you have ever heard it before. i have had 3 motors built and fail because of a unknown oiling issue or a bad assembler. anyway all my knock was around 3k or so put it in neutral and rev the car slowly mike and if it gets to that certain point in the rpm range where it starts making a loud audible knocking sound and gets faster with the rpms there is a good chance it is the bearings.
Well I plan on changing the rod bearings (if I dont see anything else internal) throw it back together and if it still does it then I"ll do the rest of the lifters, now deciding which ACL bearings to get, extremepsi.com has the "race bearings" in stock but not the normal ones and I need to have bearings tomorrow the latest and I could get the race ones next day since theyre local.
Well since those few lifters didn't do nothing and I don't think it could be the lifters since I don't see how it can sense engine load I'm really thinking its a wrist pin, especially after seeing this video. It has the EXACT same sound....
http://www.youtube.com/watch?v=ldx5DfanUlg&NR=1
http://www.youtube.com/watch?v=ldx5DfanUlg&NR=1
i was really hoping you weren't going to say your bearings were bad 
I guess i'll find out soon enough when i pull my stuff apart.
I'm going to be trying that GSC 5041 kit, because of the higher seat pressures.
It just sounds so much like valvetrain noise...
It would have been nice if you could have replaced the rest of those Lifters... ah well.
But yeah, my sound is load based too. I have no idea what it is.
can you get some pics up of the bearings?
edit - the other thing that really annoys me about this sound is it doesn't seem to be terminal. I drove around with my sound for about a month, and even did a track day in that time. I could have kept driving on it (i thought it was the mivec gear clunking around).
I guess i'll find out soon enough when i pull my stuff apart.
I'm going to be trying that GSC 5041 kit, because of the higher seat pressures.
It just sounds so much like valvetrain noise...
It would have been nice if you could have replaced the rest of those Lifters... ah well.
But yeah, my sound is load based too. I have no idea what it is.
can you get some pics up of the bearings?
edit - the other thing that really annoys me about this sound is it doesn't seem to be terminal. I drove around with my sound for about a month, and even did a track day in that time. I could have kept driving on it (i thought it was the mivec gear clunking around).
I wish I did this before I took it apart to see if I should tear off the head to pull the pistons or to put it back together with the new bearings but try this....it will help diagnose and tell you if it is a wrist pin problem, or at least tell ya which cylinder it is. When that cylinder doesnt spark theres no explosion pushing down on the piston thus making the noise....Do it and let me know what you find
http://www.youtube.com/watch?v=mVgqHai2qJE
i tried that trick of removing injector plugs.
the sound actually got worse.
so it could be wrist pin, but i would have all 4 wrist pins damaged. (i pulled 2 off at a time).
i still think it's valvetrain!
What springs/retainers/seats are you running?
the sound actually got worse.
so it could be wrist pin, but i would have all 4 wrist pins damaged. (i pulled 2 off at a time).
i still think it's valvetrain!
What springs/retainers/seats are you running?
UPDATE...Changed main and rod bearings and sound is still there, now running 15w40 then changing to 20w50 in a couple days. After more diagnosing and lots of video watching on youtube I really think its inside the head like a bent valve.
Compression test results were #152 in every cylinder except #3 had like 135 psi. Didnt do the add oil to the cylinder to see if its the rings trick. I'm assuming the low 150psi is because of the aftermarket pistons in it for lower compression. Before I rip the head off again I'm going to finish doing a leakdown test, I only did it on #1 which is the one it sounded like the noise was coming from but did not get any noticeable leakage. And im also going to recheck the lifters/rockers/valves. I tried to run it with the valve cover off and that was a BIG mistake....oil came out like a supersoaker, unless it shouldnt have done that, I expected the usual squirting but I remember seeing a huge flinging of oil coming off the cam but I forget from where exactly.
RSMike did you ever put your new lifters and parts in? Still got the noise?
Compression test results were #152 in every cylinder except #3 had like 135 psi. Didnt do the add oil to the cylinder to see if its the rings trick. I'm assuming the low 150psi is because of the aftermarket pistons in it for lower compression. Before I rip the head off again I'm going to finish doing a leakdown test, I only did it on #1 which is the one it sounded like the noise was coming from but did not get any noticeable leakage. And im also going to recheck the lifters/rockers/valves. I tried to run it with the valve cover off and that was a BIG mistake....oil came out like a supersoaker, unless it shouldnt have done that, I expected the usual squirting but I remember seeing a huge flinging of oil coming off the cam but I forget from where exactly.
RSMike did you ever put your new lifters and parts in? Still got the noise?
UPDATE...Changed main and rod bearings and sound is still there, now running 15w40 then changing to 20w50 in a couple days. After more diagnosing and lots of video watching on youtube I really think its inside the head like a bent valve.
Compression test results were #152 in every cylinder except #3 had like 135 psi. Didnt do the add oil to the cylinder to see if its the rings trick. I'm assuming the low 150psi is because of the aftermarket pistons in it for lower compression. Before I rip the head off again I'm going to finish doing a leakdown test, I only did it on #1 which is the one it sounded like the noise was coming from but did not get any noticeable leakage. And im also going to recheck the lifters/rockers/valves. I tried to run it with the valve cover off and that was a BIG mistake....oil came out like a supersoaker, unless it shouldnt have done that, I expected the usual squirting but I remember seeing a huge flinging of oil coming off the cam but I forget from where exactly.
RSMike did you ever put your new lifters and parts in? Still got the noise?
Compression test results were #152 in every cylinder except #3 had like 135 psi. Didnt do the add oil to the cylinder to see if its the rings trick. I'm assuming the low 150psi is because of the aftermarket pistons in it for lower compression. Before I rip the head off again I'm going to finish doing a leakdown test, I only did it on #1 which is the one it sounded like the noise was coming from but did not get any noticeable leakage. And im also going to recheck the lifters/rockers/valves. I tried to run it with the valve cover off and that was a BIG mistake....oil came out like a supersoaker, unless it shouldnt have done that, I expected the usual squirting but I remember seeing a huge flinging of oil coming off the cam but I forget from where exactly.
RSMike did you ever put your new lifters and parts in? Still got the noise?
Running with the Valve cover off! you should have taken a video of that 
My engine is pulled apart. It's a can of Worns. I didn't clean the head properly and there was media blasting left over. Damaged (but salvageable) Cam caps/journals. I would assume the lifters are filled with crap too. Big ends look fine, very slightly polished which is normal. Sorry i cant help
My engine is pulled apart. It's a can of Worns. I didn't clean the head properly and there was media blasting left over. Damaged (but salvageable) Cam caps/journals. I would assume the lifters are filled with crap too. Big ends look fine, very slightly polished which is normal. Sorry i cant help
Also I did put the oem lifters into the intakes on #1, 2, and 3, all the rest are still the JAM spec. I was in a rush and only did them since the sound came from that area but will be putting the rest of the oem ones to rule out the JAM ones in the other cylinders before I pull the head off, also was thinking about putting my smaller HKS cams back in since I had put in S2's at the time I put everything back together but will do the lifters first since they're cake to swap out
Last edited by My03evo; May 25, 2011 at 09:40 PM.
Running with the Valve cover off! you should have taken a video of that
My engine is pulled apart. It's a can of Worns. I didn't clean the head properly and there was media blasting left over. Damaged (but salvageable) Cam caps/journals. I would assume the lifters are filled with crap too. Big ends look fine, very slightly polished which is normal. Sorry i cant help
My engine is pulled apart. It's a can of Worns. I didn't clean the head properly and there was media blasting left over. Damaged (but salvageable) Cam caps/journals. I would assume the lifters are filled with crap too. Big ends look fine, very slightly polished which is normal. Sorry i cant help
Daamnn that sucks, I hope you didnt blast your valve cover too or else I would pull off the baffle underneath or else you'll never get everything out from under there, same with all the little passages in the head and everywhere else, but now you know that
I steam cleaned the head for about 30mins, but there was still junk in there
I didn't make any changes to the valve cover, that was clean.
I'll be checking the oil pump etc, i'm assuming that will have some damage on it from pushing the grit through to the oil filter.
So you haven't taken the head off yet?
I didn't make any changes to the valve cover, that was clean.
I'll be checking the oil pump etc, i'm assuming that will have some damage on it from pushing the grit through to the oil filter.
So you haven't taken the head off yet?
You should put all your OEM lifters in. Those JAM lifters are pieces of junk. They have probably a 10% success rate at least as reported online.
If your noise sounds like the last video you referred to though its more then likely bent valves and your going to be pulling the head anyway. Chances are your lifters caused it or a defective spring.
If your noise sounds like the last video you referred to though its more then likely bent valves and your going to be pulling the head anyway. Chances are your lifters caused it or a defective spring.
You should put all your OEM lifters in. Those JAM lifters are pieces of junk. They have probably a 10% success rate at least as reported online.
If your noise sounds like the last video you referred to though its more then likely bent valves and your going to be pulling the head anyway. Chances are your lifters caused it or a defective spring.
If your noise sounds like the last video you referred to though its more then likely bent valves and your going to be pulling the head anyway. Chances are your lifters caused it or a defective spring.
Hmm really? I've heard alot of good things about the lifters and machine work, also some bad stuff but have seen way more good things than bad. I'll swap em out with the oem ones and go from there. Basically it all started when I put the head/S2 cams/jam lifters/clutch trans all back together. First the noise was VERY unnoticeable then started getting worse and worse, after 1000 miles it was noticeable even outside the car so thats when I did the bearings. So whatever it is, it's something that progressively gets worse and worse which very well could be lifters but could also be a valve or many other things. I need to finish doing the leak down test and that should tell me if any of the valves are bent or not sealing