Another Spark plug ? - 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 06-03-2014, 08:31 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Another Spark plug ?

I am seeing the timing is correct. The heat range a little cold, (r43ts). Jetting is FAT.
BUT, WTH is up with the porcelain?
Engine has 2400 miles since rebuilt, spark plugs have 2400 miles on them also.
I will try to get better lighting.















    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-03-2014, 08:34 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-03-2014, 09:35 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
forgot to add.
mid 80's 350 chevy
87 octane , i believe with ethanol added
Carburetor

Last edited by Catfish11; 06-03-2014 at 09:45 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-04-2014, 05:15 AM
Registered User
 
Join Date: Feb 2010
Location: Ohio
Posts: 112
Wiki Edits: 0

Thanks: 0
Thanked 5 Times in 4 Posts
Quote:
Originally Posted by jjforgin234 View Post
I was told to never tighten to plugs once inside the engine, so I didn't.
What does this mean?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-04-2014, 05:23 AM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,857
Wiki Edits: 5

Thanks: 20
Thanked 247 Times in 201 Posts
Quote:
Originally Posted by Adam65 View Post
What does this mean?
Disregard...He was a spammer .......
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-04-2014, 08:52 AM
Denny's Avatar
34 chevy truck 410 merc power
 
Last photo:
Join Date: Sep 2005
Location: Loves Park, Ill
Age: 65
Posts: 813
Wiki Edits: 0

Thanks: 100
Thanked 129 Times in 125 Posts
He/she takes nice clear pictures though. hahaha He has a nice camera. hahaha
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-04-2014, 09:01 AM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls, Washington
Posts: 5,217
Wiki Edits: 9

Thanks: 100
Thanked 130 Times in 121 Posts
Those plugs don't look like it's jetted fat, also looks like possibly some aluminum on the ground, has it been detonating? What's your timing at?
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-04-2014, 10:24 AM
Registered User
 
Join Date: Mar 2013
Posts: 231
Wiki Edits: 0

Thanks: 0
Thanked 22 Times in 22 Posts
Wow as stated previously....looks like pre-ignition and or detonation. Seem like flame front is starting somewhere else and whacking the porcelain on one side and burning it. something not good is going on. Maybe mixture is too lean or engine is running too hot. Could the catalytic converter be plugged up?

My grandfather would say you've got carbon buildup. His treatment would be to race the engine hot and slowly pour quart of water down the intake to "blow out the carbon" Dangerous....Those old timers crack me up.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-04-2014, 11:14 AM
Denny's Avatar
34 chevy truck 410 merc power
 
Last photo:
Join Date: Sep 2005
Location: Loves Park, Ill
Age: 65
Posts: 813
Wiki Edits: 0

Thanks: 100
Thanked 129 Times in 125 Posts
((My grandfather would say you've got carbon buildup. His treatment would be to race the engine hot and slowly pour quart of water down the intake to "blow out the carbon" Dangerous....Those old timers crack me up.))

Glad to hear that. Old timer here. Yep, it does work though. Not dangerous, you just have to keep the rpm's up so it doesn't stall when pouring the water in the carb.
Reply With Quote Quick reply to this message
The Following User Says Thank You to Denny For This Useful Post:
68NovaSS (06-04-2014)
  #10 (permalink)  
Old 06-04-2014, 11:25 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,591
Wiki Edits: 326

Thanks: 700
Thanked 885 Times in 752 Posts
Those black specks on the porcelain could be oil that was jetted out from the top ring land due to detonation. First you get black specks from oil, then you get silver specks from the piston. Looks like the pistons are disassembling themselves. Cylinder pressure is to high for the fuel being used.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-05-2014, 07:12 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Dang , this thing seems its going from one extreme to the other. Not looking good either way. What could be causing this , bad rebuild?
These plugs have 200 miles on them with a couple full throttle runs. The plugs are R45TS what the low compression truck crate engine calls for. Its a Goodwrench crate with stock cam but has been rebuilt with cheap parts by a rebuilder company.

Timing is 36@3000RPM with egr and 16 of vacuum advance
8.5:1 compression ratio. I am sure its a little less with cheap piston on rebuild.
250 HP @4300 rpm
350 ft. lbs of torque @ 3600 rpm

It looks like the full throttle runs brought the problem out a little more to light. Looks like what i am thinking was jets being fat is actually oil. Engine has 2500 miles on rebuild, should I keep driving see if the problems clear up? Engine seems to run very smooth for the most parts and every once in a while it will miss at idle. Then other times at idle its perfectly smooth.

Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 06-05-2014, 07:13 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 06-05-2014, 07:13 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 06-05-2014, 09:04 PM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,078
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
Looks like oil being pulled through the intake valve guide. Does it use oil or smoke at start up? Have you leakdown tested it?

Today's gasoline makes plug reading even harder than it was 30 years ago when it was an art to begin with. There is too much added stuff for emission compliance and the ethanol will clean much of the traces anyway. It's good your remaining active, but do keep in mind the accuracy is suspect.
Reply With Quote Quick reply to this message
The Following User Says Thank You to johnsongrass1 For This Useful Post:
techinspector1 (06-05-2014)
  #15 (permalink)  
Old 06-05-2014, 09:42 PM
Registered User
 
Last photo:
Join Date: Feb 2012
Posts: 128
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
There is a VERY SLIGHT puff of smoke at start up , unnoticeable if your not looking at it.
Haven't leak down tested. will do a compression test this weekend.
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
89 5.0 H.O. spark plug wireing/spark order psikpa Modern Electronic Engines 6 05-11-2012 08:01 PM
Spark plug wires jumping spark STATUTORY GRAPE Engine 4 10-04-2009 05:14 AM
Spark plug help dar130 Engine 1 01-25-2008 10:25 PM
A new spark plug again dawg Engine 8 12-28-2007 01:47 PM
Spark Plug Help! fordf_1502004 Engine 4 12-07-2007 03:40 PM


All times are GMT -6. The time now is 03:20 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.