User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-02-2023, 01:14 PM #16
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 35
Posts: 7,206
Real Name: Jerod
gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 35
Posts: 7,206
Real Name: Jerod
gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of
Quote:
Originally Posted by brillo_76 View Post
How many miles on the engjne? Was the valves adjusted between 250 to 300k?

Just curious if the exhaust valves not being adjusted has anything to do with the Tim Sean's head project. As I suspecting the exhaust valves being too tight caused this?

Sent from my SM-A536V using Tapatalk
It is hard to say. Some say it's because it's an iron block and aluminum heads and they heat and expand at different rates (see 22-RE and 3VZ-E head gasket failures and the 3rd gen head gasket recall). Others say it's a weak point in the Toyota design which leads to cracks.

In my book, any engine that makes it beyond 200,000 miles without any major repairs is a win. If it can make 300,000 miles before the first major repair, that's entering legendary status.
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 240K miles.
326WHP 347TQ

AEM F/IC 6, 11 PSI, 3" Intake and 3" Exhaust
Jerod's Supercharged T[u]RD Build
gamefreakgc is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 01:36 PM #17
brillo_76's Avatar
brillo_76 brillo_76 is offline
Elite Member
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
brillo_76 brillo_76 is offline
Elite Member
brillo_76's Avatar
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
Quote:
Originally Posted by gamefreakgc View Post
It is hard to say. Some say it's because it's an iron block and aluminum heads and they heat and expand at different rates (see 22-RE and 3VZ-E head gasket failures and the 3rd gen head gasket recall). Others say it's a weak point in the Toyota design which leads to cracks.



In my book, any engine that makes it beyond 200,000 miles without any major repairs is a win. If it can make 300,000 miles before the first major repair, that's entering legendary status.
Valid point. I was wondering if the valves adjustment eliminates this issue.

As Toyota had aluminum heads and cast iron blocks si n ce the 1970s. There 20R 22R engines stayed relatively the same since the early 1980s till 1995. Rust used to kill mine before the power trains had issues



Sent from my SM-A536V using Tapatalk
__________________
7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
brillo_76 is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 05:58 PM #18
diverscale's Avatar
diverscale diverscale is offline
Member
 
Join Date: Jul 2012
Location: canada
Posts: 896
diverscale will become famous soon enough
diverscale diverscale is offline
Member
diverscale's Avatar
 
Join Date: Jul 2012
Location: canada
Posts: 896
diverscale will become famous soon enough
Quote:
Originally Posted by brillo_76 View Post
Valid point. I was wondering if the valves adjustment eliminates this issue.



Sent from my SM-A536V using Tapatalk
wondering too. I mean, since there are so many of these V6 that hit 300K miles and over without any major problem....... beside tight valves and some reason causing a lean condition a WOT, why would a valve fail/crack?
__________________
1998 4runner SR5
diverscale is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 06:18 PM #19
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,180
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,180
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
Quote:
Originally Posted by diverscale View Post
wondering too. I mean, since there are so many of these V6 that hit 300K miles and over without any major problem....... beside tight valves and some reason causing a lean condition a WOT, why would a valve fail/crack?

I think it has to do with a cylinder leaning out. The detonation and much higher combustion temps.

Leaner is meaner until you melt a hole in your pistonÖÖ


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 07:08 PM #20
brillo_76's Avatar
brillo_76 brillo_76 is offline
Elite Member
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
brillo_76 brillo_76 is offline
Elite Member
brillo_76's Avatar
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
Quote:
Originally Posted by 19963.4lsr5 View Post
I think it has to do with a cylinder leaning out. The detonation and much higher combustion temps.

Leaner is meaner until you melt a hole in your pistonÖÖ


Sent from my iPhone using Tapatalk
The higher heat damages the valve, valve seat, and stresses the aluminum. Thus cracks start.. makes sense...

Sent from my SM-A536V using Tapatalk
__________________
7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
brillo_76 is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 07:58 PM #21
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,180
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,180
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
Quote:
Originally Posted by brillo_76 View Post
The higher heat damages the valve, valve seat, and stresses the aluminum. Thus cracks start.. makes sense...

Sent from my SM-A536V using Tapatalk

I think cracks are from detonation or bad casting. All aluminum heads crack between the valves.

With our engine only having one bank and one pre-cat O2 sensor any cylinder with a poor flowing injector will cause the fuel system to add fuel. Sadly itís adding fuel to the other cylinders to make up for the poor flowing injector. Richening up all the other cylinders in hopes of increasing flow to the one thatís not flowing well.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 08:56 PM #22
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 35
Posts: 7,206
Real Name: Jerod
gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 35
Posts: 7,206
Real Name: Jerod
gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of gamefreakgc has much to be proud of
Quote:
Originally Posted by 19963.4lsr5 View Post
I think cracks are from detonation or bad casting. All aluminum heads crack between the valves.

With our engine only having one bank and one pre-cat O2 sensor any cylinder with a poor flowing injector will cause the fuel system to add fuel. Sadly itís adding fuel to the other cylinders to make up for the poor flowing injector. Richening up all the other cylinders in hopes of increasing flow to the one thatís not flowing well.


Sent from my iPhone using Tapatalk
Yes, many other engines of the same era have a bank one and bank two O2 sensor for a bit more fine tuned fuel injection. I get why they only have one to lower costs but it may come at a price. Thankfully Toyota over engineers almost everything so that if there is problem the engine and drivetrain can take it.
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 240K miles.
326WHP 347TQ

AEM F/IC 6, 11 PSI, 3" Intake and 3" Exhaust
Jerod's Supercharged T[u]RD Build
gamefreakgc is offline   Reply With QuoteReply With Quote
Old 06-02-2023, 09:53 PM #23
brillo_76's Avatar
brillo_76 brillo_76 is offline
Elite Member
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
brillo_76 brillo_76 is offline
Elite Member
brillo_76's Avatar
 
Join Date: May 2017
Location: Western PA
Posts: 5,838
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
I guess the rust hits before around here before the power train failures. As I only had 1 transmission fail all these years. [ years ago no filter change nor fluid change clutch scattered ] with 1 engine seize [2002 toyota Camry 4 cylinder had the engine low tension rings that burned oil like crazy suddly at 200k which I didn't catch fast enough. Internal engine sludge from low oil plugged journals and seized the crankshaft.





Sent from my SM-A536V using Tapatalk
__________________
7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
brillo_76 is offline   Reply With QuoteReply With Quote
Reply

Tags
bad , cylinder , fuel , problem , start

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Part number needed: valve cover bolts and oil cap O ring sakoluvr 3rd gen T4Rs 9 03-20-2018 02:18 PM
2.7 Valve Cover Gasket Replacement. Silicone needed? cdmcali 3rd gen T4Rs 2 05-23-2016 09:26 PM
4.0 valve adjustment needed? Cisco Kid 4th Gen T4Rs 8 04-18-2016 05:24 PM
Opinions on valve cover gaskets needed T4Rscott 3rd gen T4Rs 3 02-02-2013 11:37 AM
Driver's Side Valve Cover Needed Johnny Diesel 3rd gen T4Rs 0 05-05-2012 11:21 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:20 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2023 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2023 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2023 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020