Adjusting hydraulic roller lifters
08-23-2001, 12:30 AM
#1
Member
Thread Starter
Join Date: Aug 2001
Location: Sidney, B.C., Canada
Posts: 418
Likes: 0
Received 0 Likes
on
0 Posts
Car: 88 T/A
Engine: 305
Transmission: 700R4
Adjusting hydraulic roller lifters
I just finished putting a cam in my 88 trans am 305 TPI, and I proceeded to adjust the lifters. I Rotated #1 piston @ TDC, adjusted those rockers while twirling the pushrod until drag, and tightening 1 turn. then I rotated the motor 90 deg, and did # 8 cyl, rotated, did # 4 etc, etc. until they were all adjusted. Then, after assembling some other stuff on the motor, I notice that some of the rockers are actually loose. Did the lifters "bleed down" somehow? will they "pump" themselves up after I start the car? BTW I did have the lifters sitting in oil while I installed the cam, etc.
thanks, Jeff
thanks, Jeff
08-23-2001, 11:01 AM
#4
Supreme Member
Join Date: Jul 1999
Location: Loveland, OH, US
Posts: 18,457
Likes: 0
Received 15 Likes
on
15 Posts
Car: 4
Engine: 6
Transmission: 5
The piston is at TDC twice during one complete cycle of the cylinder, only one of which os suitable for setting the valves. Are you sure you had them at the TDC instance that is the firing point, not the point where the exhaust stroke ends and the intake stroke begins?
------------------
"So many Mustangs, so little time..."
ICON Motorsports
------------------
"So many Mustangs, so little time..."
ICON Motorsports
08-23-2001, 12:12 PM
#5
Supreme Member
Join Date: Jul 1999
Location: Mims, Florida
Posts: 2,149
Likes: 0
Received 1 Like
on
1 Post
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
The engine is at Firing TDC when the rockers on #6 cylinder are moving (one is closing the other is opening).
RB83L69 is correct. With the #1 piston at Firing TDC, you start by ajusting the lash on #1 rockers.
BTW, I turn down the rocker adjustment nut only 1/4 turn past zero lash.
------------------
'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 3000 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(40psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.27sec @ 103mph on MT ET Streets
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph
RB83L69 is correct. With the #1 piston at Firing TDC, you start by ajusting the lash on #1 rockers.
BTW, I turn down the rocker adjustment nut only 1/4 turn past zero lash.
------------------
'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 3000 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, 24#/hr SVO injectors, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(40psi), K&N filters, Hotchkis lowering springs, my custom chip, Lay Ind. ram air kit, SS Brakes 1LE upgrade 12" rotors dual piston calipers, 265/45R16 Kumho V700 tires.
ET 13.27sec @ 103mph on MT ET Streets
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter, next mod: 4.10 rear gears
313.7Hp & 320.6ft-lbf, ET 13.55sec @ 105.1mph
Thread
Thread Starter
Forum
Replies
Last Post
88SS6SPEED
Engine/Drivetrain/Suspension Parts for Sale
7
11-11-2015 07:05 AM
codeysabatini
Engine/Drivetrain/Suspension Parts for Sale
5
11-10-2015 04:07 PM
RyanJB
Engine/Drivetrain/Suspension Parts for Sale
0
09-14-2015 03:39 PM
dimented24x7
Tech / General Engine
4
09-06-2015 03:51 PM
