Lifter rotation after cam break in - 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 09-30-2007, 06:31 PM
Chevtec's Avatar
New Member
 
Join Date: Mar 2004
Location: Memphis, TN
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Lifter rotation after cam break in

I just finished breaking in a SBC 400 with a hydraulic cam according to the manufacturer's instructions. I used EOS and Rotella oil for the break in, and broke in the motor for 25 minutes. Now, I have a question. I pulled the valve covers off to readjust the valves and put marks on the pushrods with a sharpie. Using a remote starter to turn the motor over, I noticed that all the pushrods were turning, but at a MUCH slower rate that before the engine was run. Before, they would spin almost an eighth of a turn (or so it seemed) while turning the motor over by hand. Now, the pushrods rotate much much slower as the valve is being opened and closed.

Question: Have I done significant damage to the cam and lifters or am I just being paranoid?

I used a ton of moly lube on the cam and lifters, and when I drained the oil, it was rather cloudy (as if it was lube mixed in with the oil). Is this normal after a break-in?

Thanks in advance for the help!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-30-2007, 07:13 PM
Rob Keller's Avatar
AKA:"SLOWRIDE66"take it easy!
 
Last wiki edit: How to post pictures on a forum
Last journal entry: 85 Suburban
Last photo:
Join Date: May 2004
Location: Central Florida U.S.A.
Age: 48
Posts: 4,297
Wiki Edits: 38

Thanks: 0
Thanked 1 Time in 1 Post
Well I would not worry too much for things loosen up & lube up as the hours add up .

You should be able to spin them in between your index finger & thumb when the valve is closed {most of the tension off the push rod}.


Don't Worry
I have Enuf Paranoia for dozens of people. If nuthin is knockin or screaming you should be O K






__________________
"SlowRide66"

"Illegitimis non carborundum"
Don't let the bastards grind you down!

Crankshaft Coalition Master List of Hotrodding Forums
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-30-2007, 07:40 PM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,932
Wiki Edits: 0

Thanks: 13
Thanked 47 Times in 36 Posts
Quote:
Originally Posted by Chevtec
or am I just being paranoid?

Is this normal after a break-in?
Yes....

and

Yes...
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-30-2007, 09:58 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: Found an LQ9 today
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 41
Posts: 5,320
Wiki Edits: 16

Thanks: 20
Thanked 26 Times in 20 Posts
Everything you're talking about is perfectly normal. Before break in, the lifters and cam lobes were "rough" and they spun much more on the high side of the lobe. After they've been smoothed out by breaking it in, there is less friction there to turn it. Heck I have a few engines that the lifters don't turn at all anymore.

Cloudy oil is break in lube, machining dust, and other crap. Its normal.

Drive it.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-01-2007, 07:53 AM
Chevtec's Avatar
New Member
 
Join Date: Mar 2004
Location: Memphis, TN
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the replies guys. I don't build motors very often, so, naturally, I don't have the vast experience to understand what looks right when it gets down to this level of detail.


Incidentally, I ran a pick-up magnet through the cloudy oil I drained last night, and no matter how hard I tried, I couldn't get the magnet to pick up any metal filings anywhere.

Well then, it's time to start tuning her for the street!
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-01-2007, 11:38 AM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,901
Wiki Edits: 0

Thanks: 4
Thanked 16 Times in 13 Posts
If you don't have one in it already, put a magnetic drain plug in it. That way you can monitor the oil at regular intervals.

tom
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:
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
Cam break-in and zinc Frisco Engine 34 03-13-2007 09:22 PM
building a 1935 5 window coupe gunnulf Hotrodding Basics 8 06-28-2006 07:43 PM
sucessful cam break in- what oil to use ? fast68 Engine 8 11-21-2005 11:28 PM
Cam shaft break in stroker 58 Engine 5 10-14-2005 07:14 PM
hydrolic lifter cam vs. solid lifter cam chevyelc81 Engine 12 09-09-2003 08:38 PM


All times are GMT -6. The time now is 04:35 AM.


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.