How can you tell solid from hyd. cam? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-14-2009, 08:53 AM
redride's Avatar
1969 Nova SS502
 
Last photo:
Join Date: Feb 2009
Location: Texas
Posts: 131
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
How can you tell solid from hyd. cam?

Ok guys here is what is going on. I have a 396 that I am replacing with a 505 but I am going to use my roller rockers from the 396. When I measured for pushrods in my new motor I put the 396 on TDC and pulled the rocker arm off to measure the pushrod length with in my 505. When I put the rocker arm back on my 396 I ran the nut down on the rocker arm and set it with 1/2 turn after the pushrod was against the lifter and started the 396 which was running real rough. I turned the car off and found a plug wire off on #3 and put it back on and then started the car again, still running rough. I have had a problem with this motor having a dead cylinder after it sits for a few weeks and it clears up when I drive it. I got to thinking I do not even know if the cam in the 396 is a solid or a hyd. because it was in the car when I purchased it. My concern is what if it was a solid lift cam and I did not set the lash but ran the motor for about 1 minute. How do I tell with the motor in the car if it is solid or hyd? Could I have ruined something when I started the motor. I know this was a dumb thing to do but it is a little late for that now. Any ideas???

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-14-2009, 12:12 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,655
Wiki Edits: 0

Thanks: 15
Thanked 59 Times in 56 Posts
In most cases solid lifters tick and have to be adjusted after a while. Hydraulic lifters are quiet and pretty much adjustment free after they are set the first time.
One difference in the lifters are the solids are just that, solid, the lifter is a 1 piece design, under the plunger where the pushrod rides is also solid, and this is why they are adjusted using a feeler gauge so the clearence is set correctly.
A Hydraulic lifter has a cavaty under the plunger that fills with oil so they have a wide range they can be adjusted to since oil will bleed down the tighter it`s adjusted and the lifter will set itself to run at this adjustment.
If my explanation just confuses you more, then here`s a article.
http://www.popularhotrodding.com/eng...ic_lifter.html
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-14-2009, 12:21 PM
redride's Avatar
1969 Nova SS502
 
Last photo:
Join Date: Feb 2009
Location: Texas
Posts: 131
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the post. I understand the difference in the two lifters but I do not know how to determine what I have under the cercumstances. The 396 is in the car with the intake on. I can pull the valve cover back off, pull the rocker arm and pushrod and look down in the block and see the lifter but do not know if a solid lifter will look different than a hyd. I do not hear real well so as far as the ticking I am of no use. I guess I could pull the valve cover and check to see if there is a clerance under any of the other rocker arms. I would think that if it is a solid that the others would have some slack between the roller tip and the end of the valve stem. Correct?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-14-2009, 04:52 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,028
Wiki Edits: 0

Thanks: 3
Thanked 358 Times in 354 Posts
All the other rockers will have a bit of valve lash when the valves are fully closed on a solid lifter camed motor. A hyd lifter camed motor does not have any valve lash. Check the other rockers. (valves closed)
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-14-2009, 05:15 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
A solid lifter will impart a shock through the pushrod to the rocker that can be felt.

With the engine running and the valve covers off, place your thumb on the rocker, over the push rod. You should be able to feel a distinct shock that isn't there on a hydraulic lifter engine.

This is basically how you determine zero lash on a running hydraulic cammed engine when setting the valves. On a solid cam, the looseness will be felt on all the rockers. More noticeable when cold, usually.

Hope this makes sense.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-14-2009, 06:44 PM
redride's Avatar
1969 Nova SS502
 
Last photo:
Join Date: Feb 2009
Location: Texas
Posts: 131
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-15-2009, 11:47 PM
Registered User
 
Join Date: Mar 2009
Location: Ohio
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Not a cam expert here but I wanted to also add that another check is to tighten to just zero lash with the lifter on cam base circle and if it's a mechanical cam then it should suddenly get really tight and cause the rocker to depress the valve as opposed to the lifter plunger if I'm not mistaken.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solid vs Hyd. Lifters...AGAIN Fastest65 Engine 12 08-26-2008 04:35 PM
BBC 454 - Cam Selection - Solid vs Hydraulic - Help me Choose leejoy Engine 1 11-11-2007 04:45 PM
valve lash on a bbc solid cam elanum70velle Engine 4 07-01-2006 10:45 AM
Solid vs Hyd Cam choice Dubz Engine 6 03-08-2004 10:15 AM
hydrolic lifter cam vs. solid lifter cam chevyelc81 Engine 12 09-09-2003 07:38 PM


All times are GMT -6. The time now is 10:46 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.