What should I run for initial timing with this setup? - Page 2 - 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
  #16 (permalink)  
Old 08-07-2010, 04:18 PM
Custom10's Avatar
my KARMA ran over my DOGMA
 

Last journal entry: SS
Last photo:
Join Date: May 2009
Location: Saskatchewan, Canada
Age: 49
Posts: 1,095
Wiki Edits: 0

Thanks: 14
Thanked 24 Times in 22 Posts
Quote:
I've got a few distributors kicking around actually. I'll swap this one out for another, and see if my readings change. It's entirely possible it's worn out, the 305 it came from had 250,000km. But it ran good, which is weird.
You can check some things before hand if you are going to do a swap, make sure that the bushings are not worn on the mech adv weights and floater plate under the rotor, springs can also lose there pull and dirt can impead movement, modules can be bad, shaft end play can be out, gear worn, vac can leaking etc etc.

Quote:
I bought a compression tester. I'll give that a try today. I don't have a leakdown tester, but I did have the heads looked at by the machine shop. They said all valves but one sealed fine. The one had a slow leak. They recommended a complete valve job, but I couldn't drop an extra $1000 on it.
you don't need $1000 for this, must have been a cost to remove and reinstall heads, take them off yourself and pay about $400, bad valves/spings will cause your other efforts to vanish as wasted time. leak down checks and also a compression test...http://www.carcraft.com/techarticles...er/index1.html
Quote:
I didn't degree the cam. I did verify the TDC mark with a dial gauge though.
things can still get out of wack here so look at this
http://www.crankshaftcoalition.com/w...RAULIC_LIFTERS

Quote:
Should I look into re-adjusting the valves?
see above link following these steps may save you a bunch of time and help you to get it right

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 08-08-2010, 03:53 PM
ACA ACA is offline
Registered User
 
Last photo:
Join Date: Jun 2010
Location: Winnipeg
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I took the distributor apart down to its main components. Bushings are good, springs were swapped from a known low-km distributor. I cleaned everything up and lightly applied some grease. Shaft end play does have some slop to it, and looking online this is fairly common in these stock units. A

lthough not desirable I doubt its the cause for my concern, especially after what I learned during the compression test. More on that in a minute.

I re checked my initial and total timing, and found that the mechanical advance adds 20* by 3500ish rpm.

Compression test yielded results of 140-145 psi across the board EXCEPT for cylinder number 2. This guy was at a pathetic 95 psi. I poured a bit of oil in the cylinder and retested, now at 90 psi. Something tells me it's not the rings.

Since compression was good on the adjacent cylinder, it leads me to believe it's not a bad head gasket.

Next logical step is to re-adjust the valves using the method you linked. I'm crossing my fingers it's not a bad valve.

I checked the spark plugs and attached the image.

Cylinder one has some porcelain cracked off of it, probably from detonation while I was messing with the timing.

Cylinder two looks like all the rest, if only slightly less tan-coloured.

Cylinder three has some really weird deposits on it, although compression was good on this cylinder so I don't understand.

Cylinder seven has some pretty hefty oil deposits on one side. I'm not surprised at all that these valve seals leak oil.
Attached Thumbnails
Click image for larger version

Name:	IMG_1163.JPG
Views:	26
Size:	659.4 KB
ID:	47248  
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
What the ***** is wrong with my timing cover/ harmonic balancer!!! sexypizzaman Engine 56 10-28-2008 03:49 AM
Gear Drive to Timing Cover Clearance Double_v23 Engine 5 01-11-2008 11:08 AM
running no vacuum advance oregon chevelle Engine 30 02-07-2007 07:17 PM
ignition timing bad502 Engine 21 02-20-2006 06:57 PM
vacuum advance help batman09 Engine 14 09-09-2004 09:42 PM


All times are GMT -6. The time now is 05:54 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.