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Hydraulic Lifters
https://slantsix.org/forum/viewtopic.php?t=13387		 Page 1 of 1
Author:  70survivor [ Fri Jun 17, 2005 2:12 pm ]
Post subject:  Hydraulic Lifters
What was the first year for hydraulic lifters in the /6? I want to build another motor for my 70 Valiant but I'd like to get away from solid lifters.
Author:  slantzilla [ Fri Jun 17, 2005 2:22 pm ]
Post subject: 
'81. The hydraulic head has a different shape than a solid one. There is a kickout behind the alternator that is not there on a solid. :shock:
Author:  Slant6Ram [ Fri Jun 17, 2005 4:50 pm ]
Post subject:  Just get one from the junk yard
the 1981-1987 slant six trucks all had the hydraulic lifters. Finding a complete motor out of a junkyard is the easy way to go. :wink:
Author:  Jeb [ Sat Jun 18, 2005 7:53 pm ]
Post subject: 
The only problem with the hydro motors is the fact that the cams are very mild and performance cams are hard to come by.
Author:  SlantSixDan [ Sat Jun 18, 2005 8:54 pm ]
Post subject: 
Yeah, I can see wanting to go to hydro lifters in a super-cramped engine installation where adjusting the valves is a PITA—such as, coincidentally enough, in an '81-'87 car with all that emissions plumbing and widgetry in the way of removing the valve cover!—but in a regular installation, I prefer the solid lifters. Much wider cam selection, and it's not a bad thing to have to spend some time every now and then closely examining things under the hood.
Author:  slantzilla [ Sat Jun 18, 2005 8:57 pm ]
Post subject: 
Quote:
The only problem with the hydro motors is the fact that the cams are very mild and performance cams are hard to come by.
Believe it or not, I have an Ultradyne for a hydraulic motor. :shock:

I have no clue what I'll ever do with it, but I gots one. :roll:
Author:  JohnnyDees [ Sun Jun 19, 2005 6:21 am ]
Post subject: 
If youre not going racing and just want a slightly hotter cam they make them. They will even make custom grinds for not to much more.
Author:  CStryker [ Sun Jun 19, 2005 5:53 pm ]
Post subject: 
I have one of the newer heads with hydraulic lifters on my '82 D150, and it is in desperate need of a valve job. Can I use one of the older heads that used solid lifters on my block? If so, what changes are required (aside from the cam and lifters, of course).
Author:  Craig [ Sun Jun 19, 2005 9:33 pm ]
Post subject: 
Quote:
I have one of the newer heads with hydraulic lifters on my '82 D150, and it is in desperate need of a valve job. Can I use one of the older heads that used solid lifters on my block? If so, what changes are required (aside from the cam and lifters, of course).
As far as I know, you can use a head from a solid lifter engine, just swap over the hydraulic lifter rocker shaft and rockers and keep all your hydraulic lifter parts on the engine. You will also need the valve cover from the solid lifter head. Do check if by chance the rearmost rocker shaft bolt is different between the head you might use and the one you have now.

The main difference between the "hydraulic" and "solid" lifter heads is that the "hydraulic" head was changed to allow removal of a bad hydraulic lifter through the head so you did not have to remove the head to replace a lifter. The valve lifters do not fit through the pushrod holes in the solid lifter head.
Author:  SlantSixDan [ Sun Jun 19, 2005 10:05 pm ]
Post subject: 
Quote:
As far as I know, you can use a head from a solid lifter engine, just swap over the hydraulic lifter rocker shaft and rockers and keep all your hydraulic lifter parts on the engine. You will also need the valve cover from the solid lifter head. Do check if by chance the rearmost rocker shaft bolt is different between the head you might use and the one you have now.
That all matches my understanding, but as I said in another thread, I haven't investigated the matter carefully.
Quote:
The valve lifters do not fit through the pushrod holes in the solid lifter head.
...they do on the '74 and earlier plug-tube style heads!
Author:  CStryker [ Mon Jun 20, 2005 8:08 am ]
Post subject: 
Maybe I should rephrase my question: Can I convert my hydraulic lifter block to use mechanical lifters without considerable difficulty?
Author:  Rust collector [ Mon Jun 20, 2005 1:44 pm ]
Post subject: 
I believe the block is the same :?
Pretty sure, but not completely... :roll:
Author:  Slant6Ram [ Mon Jun 20, 2005 1:49 pm ]
Post subject:  Considerable difficulty?
Quote:
Can I convert my hydraulic lifter block to use mechanical lifters without considerable difficulty?
Yep, just drop in the parts, and it will work. (never done it, but i'm told)
Parts include,
cam
lifters
push rods
adjustable rockers

Basically, it's pretty easy if the motor is on a stand, but a big pain in the rear if you don't want to take the motor out of the car.
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