YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Sign in using an external account
Register Forgot Password?
Search


86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 01-10-2011, 03:58 PM   #1 (permalink)
Registered User
Personal Sales Rating: (0)
 
Yaddle's Avatar
 
Join Date: Dec 2010
Posts: 24
Good compression AND blue exhaust smoke?

Just a quick question. My 22RE reads 170 psi in a compression test, but I'm getting blue smoke out the exhaust when taking off after a long idle and on startup. Is it normal to see evidence of valve guide seal wear and good compression together?

I don't think anything is really wrong, I just thought these two things should never happen at the same time.
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
Yaddle is offline   Reply With Quote
Old 01-10-2011, 04:05 PM   #2 (permalink)
Registered User
Personal Sales Rating: (0)
 
xxxtreme22r's Avatar
 
Join Date: Aug 2009
Location: Wilkes-Barre, PA, USA
Posts: 13,579
have you replaced/checked your pcv valve lately?

Add yes, valves can seal properly while the valve seals are worn since the valve seals do not affect the way a valve seats (thus good compression), unless the seals and guides are real bad in which the valve itself can "wiggle" a little causing them not to seat properly (thus bad compression)

But what you describe can be valve seals too so I can tell you have done your research.
__________________
3rd Annual YOTATECH Rausch Creek Run and 2012 EC4RJ Pennsylvania

Build Thread
BMW Thread

87 P/U 4X 5sp Weber Downey Hdr 2.25 Exh EB 268





xxxtreme22r is offline   Reply With Quote
Old 01-10-2011, 04:09 PM   #3 (permalink)
Registered User
Personal Sales Rating: (0)
 
camo31_10.50's Avatar
 
Join Date: Aug 2007
Location: Vian, OK
Posts: 5,334
Wouldn't a leak down test be better for determining the problem?
__________________
I'm Roalin' Coal now.

2001 Dodge 3/4 ton cummins, 6speed, QCSB, 35's on 18's, straight piped, cattleman front bumper. CAI, and superchips tune.
camo31_10.50 is offline   Reply With Quote
Old 01-10-2011, 04:26 PM   #4 (permalink)
Registered User
Personal Sales Rating: (0)
 
xxxtreme22r's Avatar
 
Join Date: Aug 2009
Location: Wilkes-Barre, PA, USA
Posts: 13,579
not if the valves are seating properly. and with 170psi in the compression test, they definitely are.
__________________
3rd Annual YOTATECH Rausch Creek Run and 2012 EC4RJ Pennsylvania

Build Thread
BMW Thread

87 P/U 4X 5sp Weber Downey Hdr 2.25 Exh EB 268





xxxtreme22r is offline   Reply With Quote
Old 01-10-2011, 06:41 PM   #5 (permalink)
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Yaddle's Avatar
 
Join Date: Dec 2010
Posts: 24
Quote:
Originally Posted by xxxtreme22r View Post
have you replaced/checked your pcv valve lately?
I've been meaning to check it. Now I've got a good excuse.

Quote:
Originally Posted by xxxtreme22r View Post
valves can seal properly while the valve seals are worn since the valve seals do not affect the way a valve seats (thus good compression),
I see what you're saying. When the valves are closed, they would give good compression, assuming they seat well. But when they're open, oil and exhaust gas could escape past the guide seals.

Time to start reading up on the black art of doing a valve guide seal replacement without removing the head.
Yaddle is offline   Reply With Quote
Old 01-10-2011, 07:25 PM   #6 (permalink)
Registered User
Personal Sales Rating: (0)
 
94toyota's Avatar
 
Join Date: Mar 2009
Location: concord, ca
Posts: 118
Must be a 2 stroke
94toyota is offline   Reply With Quote
Old 01-10-2011, 07:44 PM   #7 (permalink)
Registered User
Personal Sales Rating: (0)
 
sb5walker's Avatar
 
Join Date: Jan 2008
Location: Connecticut
Posts: 1,085
Usually, the symptoms you describe are caused by bad valve seals, yes. If you aren't already, try MaxLife 10W-40 - in a few weeks to a month you might see enough improvement to buy some time before you have to replace the seals.
__________________
1989 V6 4x4 X-Cab 5spd 288k miles, Borla cat-back, K&N Filtercharger, 30x9.5 Bridgestone Dueler A/T REVOs
sb5walker is offline   Reply With Quote
Old 01-10-2011, 07:54 PM   #8 (permalink)
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Yaddle's Avatar
 
Join Date: Dec 2010
Posts: 24
Quote:
Originally Posted by 94toyota View Post
Must be a 2 stroke
Well it has had an engine transplant...

Quote:
Originally Posted by sb5walker View Post
try MaxLife 10W-40 - in a few weeks to a month you might see enough improvement to buy some time before you have to replace the seals.
She's due for an oil change in 1 month, so I'll give that a try. I was also considering Engine Restorer as some others had had some luck with it. But I'm not sure dumping sludge in the engine to temporarily plug the leak is such a good idea. The amount of smoke is so minor right now that I'll probably just drive it until it becomes a lot more obvious.
Yaddle is offline   Reply With Quote
Old 01-10-2011, 08:01 PM   #9 (permalink)
Registered User
Personal Sales Rating: (0)
 
sb5walker's Avatar
 
Join Date: Jan 2008
Location: Connecticut
Posts: 1,085
My veezy was leaking a fair amount past the front and rear main seals, so last spring I gave the MaxLife a try and in 2-3 weeks I noticed the leaking almost completely stopped. I'm not sure how well it would work on valve seals, but it's definitely worth a try. Running the 10W-40 is good since heavier oil usually leaks less than lighter weight. In extreme situations, 20W-50 might be needed, but it's way too thick for winter.
__________________
1989 V6 4x4 X-Cab 5spd 288k miles, Borla cat-back, K&N Filtercharger, 30x9.5 Bridgestone Dueler A/T REVOs
sb5walker is offline   Reply With Quote
Old 01-12-2011, 12:18 AM   #10 (permalink)
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Yaddle's Avatar
 
Join Date: Dec 2010
Posts: 24
Quote:
Originally Posted by sb5walker View Post
but it's definitely worth a try.
Indeed it is. I'll give the MaxLife 10w-40 a try pretty soon since the window sticker says a change is due mid February. Amazon has it for $5.60 a quart (in the 12 pack) so I imagine I can find it somewhere for even less.
Yaddle is offline   Reply With Quote
Old 01-21-2011, 11:05 PM   #11 (permalink)
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Yaddle's Avatar
 
Join Date: Dec 2010
Posts: 24
Walmart has MaxLife for $13.50 for 5 quarts so I'm going to go ahead and do the change. I'm also gonna put on a Purolator PureONE PL20195 following this thread:

http://www.yotatech.com/f116/will-lo.../#post51604096

Nevertheless I'm thinking I'm going to need at least a head job soon. A couple of days ago my yota didn't start up effortlessly like normal. No warning signs, just wouldn't kick over. I pumped the gas a couple of times and finally got it going. For the rest of the day, maybe 20 miles of driving, it was pumping blue smoke. I was sure either the head had blown or one of the valve guide seals had given up the ghost.

Since then I've driven 200 miles and the smoke hasn't returned. No coolant in the oil, no oil in the coolant. It's like it never happened. I'm glad her Wolverine healing factor kicked in and fixed the problem.
Yaddle is offline   Reply With Quote
Old 01-21-2011, 11:05 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
blue, bluish, compression, e34, eng, exaust, exhaust, good, meaning, rebuilt, smoke, smoking, taking, times, wolverine

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 11:49 AM.


2010 InternetBrands, Inc.