User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-05-2021, 06:31 PM #16
diverscale's Avatar
diverscale diverscale is offline
Member
 
Join Date: Jul 2012
Location: canada
Posts: 907
diverscale will become famous soon enough
diverscale diverscale is offline
Member
diverscale's Avatar
 
Join Date: Jul 2012
Location: canada
Posts: 907
diverscale will become famous soon enough
You've got so much to go through before rebuilding the engine. This is the final of many steps of finding why you ''lack power''.

Could be simple as a bad maf or o2 sensor.
__________________
1998 4runner SR5
diverscale is offline   Reply With QuoteReply With Quote
Old 07-05-2021, 08:41 PM #17
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 diverscale View Post
You've got so much to go through before rebuilding the engine. This is the final of many steps of finding why you ''lack power''.

Could be simple as a bad maf or o2 sensor.
But did you see the pics I posted? Its so hard to know who to listen to. You're saying that but I've had people on here say the complete opposite (look at the responses since my compression test pictures). And 2 people I've spoke to in person today suggested a rebuild. Why would an o2 sensor cause compression 65PSI below Toyotas minimum on multiple plugs?
__________________
Trip_84 is offline   Reply With QuoteReply With Quote
Old 07-05-2021, 09:36 PM #18
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
Quote:
Originally Posted by Trip_84 View Post
But did you see the pics I posted? Its so hard to know who to listen to. You're saying that but I've had people on here say the complete opposite (look at the responses since my compression test pictures). And 2 people I've spoke to in person today suggested a rebuild. Why would an o2 sensor cause compression 65PSI below Toyotas minimum on multiple plugs?
Not everyone reads the whole thread.

I also second a valve adjustment. I would not pay a shop to do it though as many of them will charge enormous labor costs because it's a complete pain to do. I've done it 3 times and it takes a lot of patience. You may also have one or more cracked valves, which in that case no amount of adjustment and shim swapping will get the lost compression back. Unfortunately the only way to find a cracked valve is to pull the cylinder heads off as even a leakdown pressure test won't tell you whether the valve is out of adjustment or if it is cracked..

Your bottom end most likely is rock solid but the valve in the heads need some R&R to get that power back online. I drove for 4 years with one cylinder at around 90 PSI, but 3 cylinders is a bit much.

P.S. my engine blew up, that's when I knew it was time to replace it lol!
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 249K 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 07-06-2021, 08:44 AM #19
TravThePro's Avatar
TravThePro TravThePro is offline
Member
 
Join Date: Jul 2017
Location: SLC Utah
Posts: 183
Real Name: Travis
TravThePro is on a distinguished road
TravThePro TravThePro is offline
Member
TravThePro's Avatar
 
Join Date: Jul 2017
Location: SLC Utah
Posts: 183
Real Name: Travis
TravThePro is on a distinguished road
If your heart is really set on doing a rebuild, listening to the people who talk of valve lash is going to be the most helpful advice.

I would recommend buying an angled feeler gauge to check what clearance you're running before you go and make that decision. It would be something like this ZUZUAN 1 Pack Feeler Gauge with 32-Blade and 1 Pack Offset Feeler Gauge with 16-Blade, Gauge Dual Marked Metric and Imperial Gap Measuring Tool: Amazon.com: Industrial & Scientific

Another good thing would be to buy a cheap borescope that will connect to your smartphone to check what all of the cylinder walls/pistons look like.

Keep in mind that doing these above jobs to test an engine with good compression from a junkyard is going to be significantly more economical than rebuilding your 5VZ. It is also very easy to mess up things like the rod cap bolts (these HAVE to be replaced if you loosen or take them off else the engine will explode).

Best of luck
__________________
1996 T4R
TravThePro is offline   Reply With QuoteReply With Quote
Old 07-06-2021, 08:56 AM #20
Bad Luck Bad Luck is offline
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,410
Real Name: Patrick
Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute
Bad Luck Bad Luck is offline
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,410
Real Name: Patrick
Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute
I would recommend a leak down test on your cylinders with low compression. Adjusting valve lash isn't going to help if the problem is worn piston rings.
__________________
2000 SR5 V6 Manual 4WD https://www.toyota-4runner.org/3rd-g...biography.html
2000 Limited V6 Auto E-Locker Sold 3/2022
Bad Luck is offline   Reply With QuoteReply With Quote
Old 07-06-2021, 12:57 PM #21
JohnMc JohnMc is offline
Senior Member
 
Join Date: Jul 2011
Location: St. Louis
Posts: 1,072
JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all
JohnMc JohnMc is offline
Senior Member
 
Join Date: Jul 2011
Location: St. Louis
Posts: 1,072
JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all
Quote:
Originally Posted by lord rigatoni View Post
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.
You can narrow that compression leak down to rings or valves with a leak-down test. See where the air is going. If it comes out the block breather, it's the rings, major rebuild needed. If it comes out the intake or exhaust, then it's valves, much less involved to fix.
__________________
'99 Highlander 5-spd manual e-locker no-running-board
SS 3" suspension lift/1" body lift/33" tires/'Snowflake' TRD Taco wheels/231mm Tundra brakes/bumpers/armor/sliders/winch/Sherpa Matterhorn rack
Manual front hubs, NWF Eco-crawler transfer case doubler, second gas tank
JohnMc is offline   Reply With QuoteReply With Quote
Old 07-06-2021, 01:31 PM #22
NachesPass4x4 NachesPass4x4 is offline
Member
 
Join Date: Jun 2021
Location: Washington state
Posts: 32
NachesPass4x4 is on a distinguished road
NachesPass4x4 NachesPass4x4 is offline
Member
 
Join Date: Jun 2021
Location: Washington state
Posts: 32
NachesPass4x4 is on a distinguished road
I'm with those that suggest adjusting the valves and doing a leak down test.

I would say the optimal time to have an engine rebuild done is when you have run out of other options.
NachesPass4x4 is offline   Reply With QuoteReply With Quote
Old 07-06-2021, 01:48 PM #23
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
A DIY valve adjustment will cost around $100 for gaskets, $50 for tools and $50 - $100 for shims. Compare that to a full rebuild which can cost $1500 or more. Worn piston rings on a 5VZ-FE or damaged cylinder walls is very uncommon.
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 249K 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 07-06-2021, 07:55 PM #24
sportscarfan's Avatar
sportscarfan sportscarfan is offline
Member
 
Join Date: Oct 2010
Location: High Country, CO
Posts: 609
sportscarfan will become famous soon enough
sportscarfan sportscarfan is offline
Member
sportscarfan's Avatar
 
Join Date: Oct 2010
Location: High Country, CO
Posts: 609
sportscarfan will become famous soon enough
A full rebuild is not worth the investment. Get a replacement from one of the Japanese engine importers if you don't find a relatively easy repair for the low compression on those 3.
__________________
'97 SR5 V6 4x4 | 5-speed | e-locker | 33's
sportscarfan is offline   Reply With QuoteReply With Quote
Old 07-07-2021, 11:20 AM #25
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,304
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: 5,304
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 sportscarfan View Post
A full rebuild is not worth the investment. Get a replacement from one of the Japanese engine importers if you don't find a relatively easy repair for the low compression on those 3.

I have almost 2000 in my rebuild. To me it’s worth it because I know the history.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 07-07-2021, 05:06 PM #26
ReconcileUs's Avatar
ReconcileUs ReconcileUs is offline
Member
 
Join Date: Mar 2019
Location: IL
Posts: 68
ReconcileUs is on a distinguished road
ReconcileUs ReconcileUs is offline
Member
ReconcileUs's Avatar
 
Join Date: Mar 2019
Location: IL
Posts: 68
ReconcileUs is on a distinguished road
Quote:
Originally Posted by 19963.4lsr5 View Post
I have almost 2000 in my rebuild. To me it’s worth it because I know the history.
It's easy to find very low mileage engines in Japan because their country is smaller and they drive less. A 5VZ-FE with under 100k miles, or under 50k miles, what more history do you need?
__________________
99' SR5 | Purchased 171k 2019 | 214k
ReconcileUs is offline   Reply With QuoteReply With Quote
Old 07-07-2021, 05:19 PM #27
Bad Luck Bad Luck is offline
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,410
Real Name: Patrick
Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute
Bad Luck Bad Luck is offline
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,410
Real Name: Patrick
Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute Bad Luck has a reputation beyond repute
Quote:
Originally Posted by ReconcileUs View Post
It's easy to find very low mileage engines in Japan because their country is smaller and they drive less. A 5VZ-FE with under 100k miles, or under 50k miles, what more history do you need?
The reason you find lower mileage JDM engines has more to do with emissions testing. Once the vehicle is ten years old it requires yearly inspection which is very costly so most Japanese people just get rid of them. The problem with knowing you're going to get rid of it at the 10 year mark can lead to some engines that are truly junk from all the sludge buildup due to lack of maintenance. I'm not saying it's the end of the world, but it is something to consider when buying a JDM engine. Also, the JDM 5VZ engines usually come from Hiace vans and require swapping over a lot of components from your original engine to the JDM engine.

By the way Japan is almost as large as the entire East Coast of the US.
__________________
2000 SR5 V6 Manual 4WD https://www.toyota-4runner.org/3rd-g...biography.html
2000 Limited V6 Auto E-Locker Sold 3/2022
Bad Luck is offline   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 03:12 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 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