What order do the lifters go back into the heads?
11-17-2016, 02:45 PM
#1
What order do the lifters go back into the heads?
I recently had to rebuild my heads on a VQ35DE.
The previous time I had a machine shop do the heads, but now I have a valve machine setup so I did a three angle valve job.
Anyway, I reassembled the heads, and when I was taking the lifters out of the cleaning solution I noticed that there were two different height lifters, and different thickness.
There are 12 short lifters, and 12 tall lifters.
Also, the number on the bottom of the lifters are
Tall lifters: 4 lifters at 816, 4 lifters at 814, and 4 at 810.
Short lifters: 4 lifters at 812, 2 at 810, 2 at 806, 2 at 804, and 2 at 802.
So what order does these things go back in?
Which lifters, tall/short, go on the intake, and exhaust? I would guess the short lifters would go on top of the intake valves as the intake valve usually have more lift vs the exhaust.
Here is the picture. [with one lifter missing from the picture]. Tall lifters on the left, short on the right.
The previous time I had a machine shop do the heads, but now I have a valve machine setup so I did a three angle valve job.
Anyway, I reassembled the heads, and when I was taking the lifters out of the cleaning solution I noticed that there were two different height lifters, and different thickness.
There are 12 short lifters, and 12 tall lifters.
Also, the number on the bottom of the lifters are
Tall lifters: 4 lifters at 816, 4 lifters at 814, and 4 at 810.
Short lifters: 4 lifters at 812, 2 at 810, 2 at 806, 2 at 804, and 2 at 802.
So what order does these things go back in?
Which lifters, tall/short, go on the intake, and exhaust? I would guess the short lifters would go on top of the intake valves as the intake valve usually have more lift vs the exhaust.
Here is the picture. [with one lifter missing from the picture]. Tall lifters on the left, short on the right.
11-17-2016, 03:01 PM
#2
Before someone says it, I know you have to measure the lash with the camshaft installed.
However the shop that did this job before did have them in correct order as the lash was within specs when I installed the heads on the first time.
I'm just wondering if there is an order maybe front of the engine to rear as in maybe the lifter goes something like 816 to 810 front to rear.
If I have to end up doing this as in trial/error, its going to be a nightmare.
However the shop that did this job before did have them in correct order as the lash was within specs when I installed the heads on the first time.
I'm just wondering if there is an order maybe front of the engine to rear as in maybe the lifter goes something like 816 to 810 front to rear.
If I have to end up doing this as in trial/error, its going to be a nightmare.
11-18-2016, 01:35 PM
#5
It took pretty much all day to grind the ends of the valve stems on my valve machine to get the clearance set for ONE HEAD.
It would have been faster, but my old SnapOn valve machine was missing the adjustment **** so it was, grind a little, test fit, grind a little, etc until the clearance was right.
I did grind a couple of valves too much, but thankfully I had some old valves laying around.
ALL of the lifters were too tight. I didn't get a break on a single one.
After doing all of this I don't see how the engine even ran before, but the compression test showed good back then so, go figure.
If you guys are going to get into doing your own valve jobs, and I suggest you should as its not that hard, THIS tool is a life saver for removing, and installing the springs, and ITS CHEAP!!!!
http://www.ebay.com/itm/52OTC-Large-VALVE-SPRING-COMPRESSOR-VALVE-TRAIN-TOOL-4572/300909038440?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D38530%26meid%3Dbe5a5d7b670c48c9a63c09fbc110453b%26pid%3D100033%26rk%3D8%26rkt%3D8%26sd%3D281465784706
It would have been faster, but my old SnapOn valve machine was missing the adjustment **** so it was, grind a little, test fit, grind a little, etc until the clearance was right.
I did grind a couple of valves too much, but thankfully I had some old valves laying around.
ALL of the lifters were too tight. I didn't get a break on a single one.
After doing all of this I don't see how the engine even ran before, but the compression test showed good back then so, go figure.
If you guys are going to get into doing your own valve jobs, and I suggest you should as its not that hard, THIS tool is a life saver for removing, and installing the springs, and ITS CHEAP!!!!
http://www.ebay.com/itm/52OTC-Large-VALVE-SPRING-COMPRESSOR-VALVE-TRAIN-TOOL-4572/300909038440?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D38530%26meid%3Dbe5a5d7b670c48c9a63c09fbc110453b%26pid%3D100033%26rk%3D8%26rkt%3D8%26sd%3D281465784706
11-26-2016, 06:29 PM
#6
You state in your 1st post that you did a 3 angle valve job.
If you removed material from either the valve seat or valve face, the valve stem will now protrude further & hence the lifter will have less clearance with the camshaft than before.
You rectified this by grinding the stem. What you did was not wrong but the usual way of correcting over or under valve lash on this type of motor is to use the chart & select the correct lifter
The motor had good compression & ran well before because the clearances were correct then
If you removed material from either the valve seat or valve face, the valve stem will now protrude further & hence the lifter will have less clearance with the camshaft than before.
You rectified this by grinding the stem. What you did was not wrong but the usual way of correcting over or under valve lash on this type of motor is to use the chart & select the correct lifter
The motor had good compression & ran well before because the clearances were correct then
09-10-2020, 11:55 AM
#7
Registered User
Join Date: Sep 2020
Location: Chicago
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Tall and Short Buckets
I recently had to rebuild my heads on a VQ35DE.
The previous time I had a machine shop do the heads, but now I have a valve machine setup so I did a three angle valve job.
Anyway, I reassembled the heads, and when I was taking the lifters out of the cleaning solution I noticed that there were two different height lifters, and different thickness.
There are 12 short lifters, and 12 tall lifters.
Also, the number on the bottom of the lifters are
Tall lifters: 4 lifters at 816, 4 lifters at 814, and 4 at 810.
Short lifters: 4 lifters at 812, 2 at 810, 2 at 806, 2 at 804, and 2 at 802.
So what order does these things go back in?
Which lifters, tall/short, go on the intake, and exhaust? I would guess the short lifters would go on top of the intake valves as the intake valve usually have more lift vs the exhaust.
Here is the picture. [with one lifter missing from the picture]. Tall lifters on the left, short on the right.
Attachment 383639
The previous time I had a machine shop do the heads, but now I have a valve machine setup so I did a three angle valve job.
Anyway, I reassembled the heads, and when I was taking the lifters out of the cleaning solution I noticed that there were two different height lifters, and different thickness.
There are 12 short lifters, and 12 tall lifters.
Also, the number on the bottom of the lifters are
Tall lifters: 4 lifters at 816, 4 lifters at 814, and 4 at 810.
Short lifters: 4 lifters at 812, 2 at 810, 2 at 806, 2 at 804, and 2 at 802.
So what order does these things go back in?
Which lifters, tall/short, go on the intake, and exhaust? I would guess the short lifters would go on top of the intake valves as the intake valve usually have more lift vs the exhaust.
Here is the picture. [with one lifter missing from the picture]. Tall lifters on the left, short on the right.
Attachment 383639
IF so, I'd love to know for future reference, 132312Y800 vs 132317S000 - Intake/exhaust part numbers and I believe one of them was discontinued.
One is 1.945" tall and other is 1.830" tall.
Thanks.
DPH