Engine & Internal Chat about beefing up your Blazer's engine insides here.

Seafoam 300k safe?

  #1  
Old 03-31-2011, 03:16 PM
Beginning Member
Thread Starter
Join Date: Jan 2010
Posts: 47
Bullfrog2099 is on a distinguished road
Default Seafoam 300k safe?

Hi, I have a 96 Blazer fairly well maintained with close to 300k on it. I've been meaning to seafoam it using the vacuum line method with only 1/2 a can and doing a oil change after the smoke show. I've already cleaned a good deal of carbon off the throttlebody and cleaned the egr & iac. I noticed a thick layer of carbon or oil and dirt build up in one of the two ports leading to the egr when I had the egr removed. (not sure if the seafoam goes through this area)

In short, using the vacuume line method- is there a risk of dislodging anything to the point of causing engine leaks where their shouldn't be any in a high mileage vehicle? Someone else suggested on a different forum to do a compression test on the cylinders and if the compression is lower than 140, then you probably shouldn't seafoam. but this guy put seafoam in the crankcase, gas, and vacuum line. Thanks.
 
  #2  
Old 03-31-2011, 04:32 PM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,803
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

Seafoam in the oil would serve to clean the junk out of the rings as well just maybe not as fast as it would through the combustion chamber. If your truck is running fairly well, I'm not sure I would do it. If it did cause problems, it was just uncovering the inevitable.
 
  #3  
Old 04-01-2011, 12:42 AM
Beginning Member
Thread Starter
Join Date: Jan 2010
Posts: 47
Bullfrog2099 is on a distinguished road
Default

Originally Posted by swartlkk View Post
Seafoam in the oil would serve to clean the junk out of the rings as well just maybe not as fast as it would through the combustion chamber. If your truck is running fairly well, I'm not sure I would do it. If it did cause problems, it was just uncovering the inevitable.
Thanks Kyle, was wondering if Auto Rx has the same kind of effect as the seafoam in cleaning the junk out of the rings?

I was already running Auto Rx in the oil and I've gone 3000 miles now. Originally I was going to Seafoam before changing the oil with the Auto Rx treatment, but if the Auto Rx is already doing the job that the seafoam would do- then that would reinforce my decision not to use Seafoam before I do the rinse phase of the Auto Rx. Was I going overkill?
 
  #4  
Old 04-01-2011, 06:11 AM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,803
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

Most of the treatments available clean up the internals of the engine. Auto Rx is a leave in treatment whereas seafoam really isn't. If you were to put seafoam in the oil, you would want to do it 200-300 miles before your scheduled change and then dump it. It doesn't lubricate as well the leave in stuff does.

It really is a crap shot as far as whether or not anything bad will happen.
 
  #5  
Old 04-03-2011, 10:33 PM
chris015's Avatar
BF Veteran
Join Date: Apr 2009
Location: South Carolina
Posts: 3,748
chris015 has a spectacular aura aboutchris015 has a spectacular aura aboutchris015 has a spectacular aura about
Default

id just run it through the intake. I wouldn't pour it into the crankcase. If you had any bad leaks that crud was plugging up, you'd have more of a chance of problems pouring it into the oil. Just give the valves a good cleaning through the intake. I know some will still get in it,but not as much as dumping it into the oil.
 
  #6  
Old 06-02-2011, 11:18 PM
Beginning Member
Join Date: May 2011
Location: Cincinnati
Posts: 30
94_Jimmy is on a distinguished road
Default

Actually according to Seafoams website you can leave it in your oil until your next oil change no matter how many miles you have left. All they mention is that it will cause your oil to get dirty quicker which I take as changing your oil in half the miles you normally would.
 
  #7  
Old 06-02-2011, 11:34 PM
97cherryblazer's Avatar
Super Member
Join Date: Sep 2010
Location: Lynnwood WA
Posts: 1,486
97cherryblazer will become famous soon enough97cherryblazer will become famous soon enough
Default

I heard puting seafoam in the vac line only gets the back two pistons. Would it be better to put it in the PCV?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
manfrednj
New Member Area
7
05-11-2012 12:20 AM
sh1520
2nd Gen S-series (1995-2005) Tech
5
11-27-2009 03:30 PM
Inferno
Engine & Transmission
2
05-05-2007 08:03 PM
scottyk
Engine & Transmission
5
04-06-2007 08:52 AM
XBlazer01
Sights N Sounds
6
09-12-2006 12:29 PM


Thread Tools
Search this Thread
Quick Reply: Seafoam 300k safe?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.