User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-03-2021, 08:05 PM #1
Trip_84's Avatar
Trip_84 Trip_84 is offline
Member
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
Trip_84 Trip_84 is offline
Member
Trip_84's Avatar
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
When to rebuild engine?

I am curious as to when it is optimal time to have an engine rebuild done or maybe it is case by case? I currently have 240k miles on my V6. I've always had the complaint that the 4runner just feels tired and weak. Riding trails going over the smallest obstacles like rocks or little lips I have to floor it and just feel like I barely make it over. Even going up a curb feels like work. Going in sand I'm flooring it just to stay barely moving while I see other 4runners and jeeps moving really good through the same terrain.

Not sure if its a compression issue or something else. Does anyone recommend a good shop in Las Vegas or southern Utah to get work like that done?
__________________
Trip_84 is offline   Reply With QuoteReply With Quote
Old 07-03-2021, 09:02 PM #2
JZiggy's Avatar
JZiggy JZiggy is online now
Senior Member
 
Join Date: Oct 2016
Location: Atlanta
Posts: 1,770
JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold
JZiggy JZiggy is online now
Senior Member
JZiggy's Avatar
 
Join Date: Oct 2016
Location: Atlanta
Posts: 1,770
JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold JZiggy is a splendid one to behold
Start with a compression check. Low compression means there's a mechanical issue robbing you of power (worn rings, valves not seating, etc.)
JZiggy is online now   Reply With QuoteReply With Quote
Old 07-03-2021, 09:36 PM #3
Pilotmatt's Avatar
Pilotmatt Pilotmatt is offline
Member
 
Join Date: May 2010
Location: Minneapolis, MN
Posts: 146
Pilotmatt is on a distinguished road
Pilotmatt Pilotmatt is offline
Member
Pilotmatt's Avatar
 
Join Date: May 2010
Location: Minneapolis, MN
Posts: 146
Pilotmatt is on a distinguished road
I know ill be dropping in a v8 when my engine goes…just 20-30 years to go!
__________________
2017 SR5 4WD Premium
2003 SR5 4WD V8 (2010-2017)
Pilotmatt is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 12:21 AM #4
Devbot's Avatar
Devbot Devbot is offline
Senior Member
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
Devbot Devbot is offline
Senior Member
Devbot's Avatar
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
Are you running ethanol free? Personally I notice a night and day difference between even 10% and 0%, ethanol free feels immediate but 10-15% is noticeably sluggish
Otherwise, to directly answer the question, when it breaks and can't be repaired!
__________________
Y2K Highlander Millennium Silver 3.4L auto @ 295k and climbing
Tundra TRD Lift in Front / LC Lift in Rear / JBA UCAs / CVJ 9168R Axles / Diff Drop / PCK / Extended Bump Stops; Brake Lines; Sway Bar Links; Rear Diff Breather / True North Fab. Hybrid Bumper / Smittybilt XRC Gen 3 Comp. / Northstar 880CCA AGM / Drivelines NW Rear Shaft / Lil Skip Gas Skid / BudBuilt Front Skid
Devbot is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 01:02 AM #5
spartacus's Avatar
spartacus spartacus is online now
Senior Member
 
Join Date: Mar 2010
Location: denver
Posts: 2,164
spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold
spartacus spartacus is online now
Senior Member
spartacus's Avatar
 
Join Date: Mar 2010
Location: denver
Posts: 2,164
spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold spartacus is a splendid one to behold
When was the timing belt done? A worn, stretched timing belt will have that effect also.
spartacus is online now   Reply With QuoteReply With Quote
Old 07-04-2021, 02:32 AM #6
Devbot's Avatar
Devbot Devbot is offline
Senior Member
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
Devbot Devbot is offline
Senior Member
Devbot's Avatar
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
^^^And take a peak at your harmonic balancer while you're at it. I remember seeing a while back the keyway can become wallowed out with age
__________________
Y2K Highlander Millennium Silver 3.4L auto @ 295k and climbing
Tundra TRD Lift in Front / LC Lift in Rear / JBA UCAs / CVJ 9168R Axles / Diff Drop / PCK / Extended Bump Stops; Brake Lines; Sway Bar Links; Rear Diff Breather / True North Fab. Hybrid Bumper / Smittybilt XRC Gen 3 Comp. / Northstar 880CCA AGM / Drivelines NW Rear Shaft / Lil Skip Gas Skid / BudBuilt Front Skid
Devbot is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 10:16 AM #7
alumarine alumarine is offline
Member
 
Join Date: Dec 2015
Location: Manitoba, Canada
Posts: 793
alumarine will become famous soon enough
alumarine alumarine is offline
Member
 
Join Date: Dec 2015
Location: Manitoba, Canada
Posts: 793
alumarine will become famous soon enough
Notice how no one has said "time to rebuid".

Lots of things to check for poor performance that don't include rebuilding.
__________________
2000 4runner 4wd Auto V6 - Tru-Cool LPD4454 trans cooler in series
1991 4runner 4wd Auto V6
1990 4runner 4wd Auto V6
alumarine is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 03:21 PM #8
Trip_84's Avatar
Trip_84 Trip_84 is offline
Member
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
Trip_84 Trip_84 is offline
Member
Trip_84's Avatar
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
Quote:
Originally Posted by alumarine View Post
Notice how no one has said "time to rebuid".

Lots of things to check for poor performance that don't include rebuilding.
hmm that seems to be more of a broad statement though. I also titled the post "WHEN to rebuild?".... no one seemed to answer that. Yes I have my own issues but I also would like to know WHEN someone would rebuild an engine. When it becomes cost effective? When is that? Something specific happens or breaks?
__________________
Trip_84 is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 03:31 PM #9
Trip_84's Avatar
Trip_84 Trip_84 is offline
Member
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
Trip_84 Trip_84 is offline
Member
Trip_84's Avatar
 
Join Date: Sep 2016
Location: Las Vegas
Posts: 75
Trip_84 is on a distinguished road
Quote:
Originally Posted by JZiggy View Post
Start with a compression check. Low compression means there's a mechanical issue robbing you of power (worn rings, valves not seating, etc.)
I just finished doing the compression test. I followed the Timmy The Toolman's video. He states the book says 174PSI minimum and no more than 15PSI difference.

I attached 2 plugs. The dirtier of the 2 is the 115PSI plug and the cleaner one is the 191PSI.
Attached Images
When to rebuild engine?-1-jpg  When to rebuild engine?-115psi-jpg  When to rebuild engine?-191psi-jpg 
__________________

Last edited by Trip_84; 07-04-2021 at 03:34 PM.
Trip_84 is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 03:52 PM #10
lord rigatoni lord rigatoni is offline
Member
 
Join Date: Oct 2020
Location: Irvine, California
Age: 19
Posts: 31
Real Name: Zach Payne
lord rigatoni is on a distinguished road
lord rigatoni lord rigatoni is offline
Member
 
Join Date: Oct 2020
Location: Irvine, California
Age: 19
Posts: 31
Real Name: Zach Payne
lord rigatoni is on a distinguished road
Quote:
Originally Posted by Trip_84 View Post
I just finished doing the compression test. I followed the Timmy The Toolman's video. He states the book says 174PSI minimum and no more than 15PSI difference.

I attached 2 plugs. The dirtier of the 2 is the 115PSI plug and the cleaner one is the 191PSI.
jeez man no wonder your 4runner feels sluggish, thats some serious compression loss. id check your valve seats and your valves to see if any of them are burnt. your piston rings could also be fried as well so yeah it may be time for a rebuild. if you have the tools you could do it yourself, rebuilding engines can be a good time.
__________________
2000 SR5 2WD auto - mods coming soon now that im not broke

Last edited by lord rigatoni; 07-04-2021 at 03:55 PM.
lord rigatoni is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 04:05 PM #11
19963.4lsr5 19963.4lsr5 is offline
Senior Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 4,313
19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light
19963.4lsr5 19963.4lsr5 is offline
Senior Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 4,313
19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light 19963.4lsr5 is a glorious beacon of light
It’s worth checking your valve adjustment.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 04:19 PM #12
Brian.'s Avatar
Brian. Brian. is offline
Member
 
Join Date: Jan 2019
Location: Earth
Posts: 602
Brian. is just really nice Brian. is just really nice Brian. is just really nice Brian. is just really nice Brian. is just really nice
Brian. Brian. is offline
Member
Brian.'s Avatar
 
Join Date: Jan 2019
Location: Earth
Posts: 602
Brian. is just really nice Brian. is just really nice Brian. is just really nice Brian. is just really nice Brian. is just really nice
Quote:
Originally Posted by Trip_84 View Post
... but I also would like to know WHEN someone would rebuild an engine. When it becomes cost effective? When is that? Something specific happens or breaks?
Used 5vz engines are about $500 around me, about 4~5 times Cheaper than rebuilding and they are VERY robust engines. So rebuilding isn't really Ever a viable option.

But rebuild/replace when there's an Obvious deficiency within the engine... burned hole in piston, broken rings, spun main bearing type issues. Otherwise pull and replace is a Whole lot faster and cheaper. Might invest some time in the replacement engine to make sure it's all "fresh" before putting it in place... maybe.
__________________
'99 Limited 4x4, Millenium Silver ~ Maintenance Thread
Brian. is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 04:26 PM #13
2chains 2chains is offline
Member
 
Join Date: Dec 2012
Location: Alberta
Posts: 509
2chains is on a distinguished road
2chains 2chains is offline
Member
 
Join Date: Dec 2012
Location: Alberta
Posts: 509
2chains is on a distinguished road
Aren't the spark plugs double tipped for 3rd gen?
__________________
Sold 2015 Canadian TE Magnetic Grey-Toytec BOSS, 285 70 17 Duratracs, LED interior upgrade, Blue Sea fuse block, Gobi Stealth, Morimoto LED fogs, FN Pro(x) Wheels, XD Xtreme 4300k HID.
1996 4runner Limited Natural White w/ Silver Cloud trim. 265 75 16 some kind of bilstein lift unknown rear coil...looked underneath fronts BILSTEIN 24-248738 88 5100 rear BILSTEIN 24-249966 5100 SERIES
2chains is offline   Reply With QuoteReply With Quote
Old 07-04-2021, 04:41 PM #14
Devbot's Avatar
Devbot Devbot is offline
Senior Member
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
Devbot Devbot is offline
Senior Member
Devbot's Avatar
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,181
Real Name: Devan
Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice Devbot is just really nice
Quote:
Originally Posted by Trip_84 View Post
I just finished doing the compression test. I followed the Timmy The Toolman's video. He states the book says 174PSI minimum and no more than 15PSI difference.

I attached 2 plugs. The dirtier of the 2 is the 115PSI plug and the cleaner one is the 191PSI.
Well there's ya problem!
Quote:
Originally Posted by Brian. View Post
Used 5vz engines are about $500 around me, about 4~5 times Cheaper than rebuilding and they are VERY robust engines. So rebuilding isn't really Ever a viable option.

But rebuild/replace when there's an Obvious deficiency within the engine... burned hole in piston, broken rings, spun main bearing type issues. Otherwise pull and replace is a Whole lot faster and cheaper. Might invest some time in the replacement engine to make sure it's all "fresh" before putting it in place... maybe.
If I'm not mistaken you can get them fairly fresh in a crate from Japan for like $1500 (just the price of the engine, not shipping and whatnot too). Or if you wanna spend some dollars Yota1 will give you one that's brand spanking new with some nice powdercoating
All things considered our engines are pretty affordable. Could be much, much worse
__________________
Y2K Highlander Millennium Silver 3.4L auto @ 295k and climbing
Tundra TRD Lift in Front / LC Lift in Rear / JBA UCAs / CVJ 9168R Axles / Diff Drop / PCK / Extended Bump Stops; Brake Lines; Sway Bar Links; Rear Diff Breather / True North Fab. Hybrid Bumper / Smittybilt XRC Gen 3 Comp. / Northstar 880CCA AGM / Drivelines NW Rear Shaft / Lil Skip Gas Skid / BudBuilt Front Skid
Devbot is offline   Reply With QuoteReply With Quote
Old 07-05-2021, 05:04 PM #15
Bad Luck Bad Luck is online now
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 2,048
Real Name: Patrick
Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold
Bad Luck Bad Luck is online now
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 2,048
Real Name: Patrick
Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold Bad Luck is a splendid one to behold
Quote:
Originally Posted by 2chains View Post
Aren't the spark plugs double tipped for 3rd gen?
Double ground spark plugs are recommended for the 3.4L. It helps from getting worn out due to the waste spark ignition system.
__________________
2000 Limited V6 Auto E-Locker
Bad Luck is online now   Reply With QuoteReply With Quote
Reply

Tags
barely , feels , good , moving , work

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
2005 T4R v6 engine knock | Engine Rebuild beezee 4th Gen T4Rs 52 08-12-2021 03:46 PM
4th Gen V6 SR5 4WD Engine Rebuild asabs6 4th Gen T4Rs 3 05-26-2017 05:24 AM
T4R 1st gen engine rebuild air_wolf Classic T4Rs 5 10-26-2012 11:55 AM
My 3rz engine rebuild is done (almost) fastolds 3rd gen T4Rs 3 07-01-2012 03:55 PM
engine rebuild TNprogrammer 3rd gen T4Rs 1 04-05-2010 05:30 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:57 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2021 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