Engine starting to knock/tick.

cre · 02-23-2010, 05:47 PM

Are you certain it's the bottom end?

DarkSupra2.5 · 02-24-2010, 01:59 AM

To be honest cre, no i'm not. But due to rain and not having my garage free to work, (gotta love my friends), I haven't had a chance to get under there to pull it apart. I've pulled the cam covers off to see if one of the: pushrods? cam followers? fell in, which would let me know if a valve dropped, but everything is still in place. I know the cam's use shims and all for spacing, but i didnt see the remains of anything sitting up there so i wrote that off. If there's a break in the rain however I'll drop the oil and look for metal.

You think I might luck out and it could be something simple?

cre · 02-24-2010, 05:02 AM

Sure, it could be something simple... I've seen a loose cam gear cause a tick which resonated down the length of the camshaft making it sound like it was coming from the back of the engine... but, sadly, I wouldn't count on it; it is worth checking for though.

Unless you pulled the cams and removed the shims and buckets you can't tell if you've lost a valve or broke a spring... pulling valve covers is only one fourth of the trip.

I'm not terribly familiar with all of the construction of the 1JZ, so the best I can offer is conventional diagnostic advice; I can't point you to common failure points.

The next thing I would do is: while the engine is running, pull the wires to the coils one at a time to determine if the sound is indeed tied to one specific cylinder and if so which one.

DarkSupra2.5 · 02-24-2010, 02:49 PM

Your advice is welcome though cre, even if the engine construction isn't the same as the 7m's, it's pretty close from what I could see of the engine. Plus, listening to you guys here, it gives me other viewpoints to look at the problem. It looks like the rain is going to let up today hopefully, so I'll be able to start pulling it apart today. Thanks for the help.

DarkSupra2.5 · 02-25-2010, 02:28 AM

Ugh, well, the jig is up. The rain let up today so I pulled off the lower portion of the oil pan and took a look around the lower block section of my 1j. The oil was clean, but i've learned not to trust it. I spun the #3 rod bearing, nice little shards are on the bottom of the pan. BUT, there doesn't seem to be any major damage. I'm still thinking of getting the 2j block from the yard out here, but it also seems I caught it soon enough that I can rebuild the 1j after flushing the oil system a few times.

What a drag.

cre · 02-25-2010, 05:31 AM

Sucks man... I'm sorry... It is definitely a good thing you caught it now. Check them all and don't hesitate to get the crank polished if there are any negative signs.

I've got a bad bearing (ball bearing) sound I really need to get off my rear and chase down.... but it's been wet and cold and snowy and I don't have a garage at my disposal.

DarkSupra2.5 · 02-25-2010, 04:10 PM

I know how you feel, every few days for the last couple of months it has been raining here in sac. It kind of makes working hard to do, especially when you can't feel your fingers. Good luck with the bearing sound, hopefully it'll clear up soon so you can chase it down.

Ugh, I'll be pulling my motor and trans apart again it seems....Such a drag.

02-23-2010, 05:47 PM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Are you certain it's the bottom end? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-24-2010, 01:59 AM	#2
DarkSupra2.5 3" Exhaust Join Date: May 2008 Location: Sacramento Posts: 60	To be honest cre, no i'm not. But due to rain and not having my garage free to work, (gotta love my friends), I haven't had a chance to get under there to pull it apart. I've pulled the cam covers off to see if one of the: pushrods? cam followers? fell in, which would let me know if a valve dropped, but everything is still in place. I know the cam's use shims and all for spacing, but i didnt see the remains of anything sitting up there so i wrote that off. If there's a break in the rain however I'll drop the oil and look for metal. You think I might luck out and it could be something simple? __________________ 1jz-gte swap (Currently spun #3 rod bearings), Apexi high flow filter, Greddy thrust 3" downpipe, N1 3" catback with cat delete tube, 1 peice driveshaft, Bar and Plate intercooler, and 440 JDM 2jz injectors. Possible 2jz lower block swap in the works if I can't rebuild the 1j. So troublesome.

02-24-2010, 02:49 PM	#4
DarkSupra2.5 3" Exhaust Join Date: May 2008 Location: Sacramento Posts: 60	Your advice is welcome though cre, even if the engine construction isn't the same as the 7m's, it's pretty close from what I could see of the engine. Plus, listening to you guys here, it gives me other viewpoints to look at the problem. It looks like the rain is going to let up today hopefully, so I'll be able to start pulling it apart today. Thanks for the help. __________________ 1jz-gte swap (Currently spun #3 rod bearings), Apexi high flow filter, Greddy thrust 3" downpipe, N1 3" catback with cat delete tube, 1 peice driveshaft, Bar and Plate intercooler, and 440 JDM 2jz injectors. Possible 2jz lower block swap in the works if I can't rebuild the 1j. So troublesome.

02-25-2010, 02:28 AM	#5
DarkSupra2.5 3" Exhaust Join Date: May 2008 Location: Sacramento Posts: 60	Ugh, well, the jig is up. The rain let up today so I pulled off the lower portion of the oil pan and took a look around the lower block section of my 1j. The oil was clean, but i've learned not to trust it. I spun the #3 rod bearing, nice little shards are on the bottom of the pan. BUT, there doesn't seem to be any major damage. I'm still thinking of getting the 2j block from the yard out here, but it also seems I caught it soon enough that I can rebuild the 1j after flushing the oil system a few times. What a drag. __________________ 1jz-gte swap (Currently spun #3 rod bearings), Apexi high flow filter, Greddy thrust 3" downpipe, N1 3" catback with cat delete tube, 1 peice driveshaft, Bar and Plate intercooler, and 440 JDM 2jz injectors. Possible 2jz lower block swap in the works if I can't rebuild the 1j. So troublesome.

02-25-2010, 05:31 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Sucks man... I'm sorry... It is definitely a good thing you caught it now. Check them all and don't hesitate to get the crank polished if there are any negative signs. I've got a bad bearing (ball bearing) sound I really need to get off my rear and chase down.... but it's been wet and cold and snowy and I don't have a garage at my disposal. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-24-2010, 05:02 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Sure, it could be something simple... I've seen a loose cam gear cause a tick which resonated down the length of the camshaft making it sound like it was coming from the back of the engine... but, sadly, I wouldn't count on it; it is worth checking for though. Unless you pulled the cams and removed the shims and buckets you can't tell if you've lost a valve or broke a spring... pulling valve covers is only one fourth of the trip. I'm not terribly familiar with all of the construction of the 1JZ, so the best I can offer is conventional diagnostic advice; I can't point you to common failure points. The next thing I would do is: while the engine is running, pull the wires to the coils one at a time to determine if the sound is indeed tied to one specific cylinder and if so which one. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-25-2010, 04:10 PM	#7
DarkSupra2.5 3" Exhaust Join Date: May 2008 Location: Sacramento Posts: 60	I know how you feel, every few days for the last couple of months it has been raining here in sac. It kind of makes working hard to do, especially when you can't feel your fingers. Good luck with the bearing sound, hopefully it'll clear up soon so you can chase it down. Ugh, I'll be pulling my motor and trans apart again it seems....Such a drag. __________________ 1jz-gte swap (Currently spun #3 rod bearings), Apexi high flow filter, Greddy thrust 3" downpipe, N1 3" catback with cat delete tube, 1 peice driveshaft, Bar and Plate intercooler, and 440 JDM 2jz injectors. Possible 2jz lower block swap in the works if I can't rebuild the 1j. So troublesome.

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