User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-06-2021, 11:42 PM #1
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
Slow coolant leak

Is there an acceptable amount of coolant loss a vehicle will have over time? I have never really monitored coolant loss until the last few years when I had a lower intake manifold leak. I got that leak repaired about 3k miles ago ( I think) but I notice I have lost about 1/2 cup of coolant over 2600 miles. Car runs fine temps are fine and no visible external leaks or smoke during start up. I will continue to monitor to get a baseline before I decide if I want to do anything.

I've owned my 4runner since 2003 and currently has 280k

I have a v6 with 5speed and radiator is somewhat new.

Seeking out any advice

Thanks

MikeM
TucsonMike is offline   Reply With QuoteReply With Quote
Old 10-07-2021, 12:20 AM #2
Devbot's Avatar
Devbot Devbot is offline
Senior Member
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,348
Real Name: Devan
Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light
Devbot Devbot is offline
Senior Member
Devbot's Avatar
 
Join Date: Apr 2020
Location: Monroe, WA
Posts: 1,348
Real Name: Devan
Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light Devbot is a glorious beacon of light
It wouldn't hurt to do the gaskets as I suspect they're probably the culprit personally. When I did my intake manifold gaskets ALSO around 280k (as part of solving a different issue) I noticed the material around both coolant passages on both gaskets was heavily eaten away, as in if I had left it for another year I probably would've been leaking into one of my intake valves - they were all holding on by a hair. Given both the age and mileage our vehicles are approaching I wouldn't put it past things if you have the same issue. And considering you can buy the gaskets online fairly cheap and it's not exactly a complex job (just tedious, especially by yourself) I would give it a whirl and see if it changes anything. I went with felpro instead of Denso as they were much cheaper and have absolutely nothing bad to say
Worst case scenario it was a few bills and an afternoon down the drain but at least you can rule it out at that point
__________________
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 10-07-2021, 12:52 AM #3
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
Thanks for reply but I have already replaced the lower intake manifold gaskets. I should add the bypass and valley were dry. Water pump was dry and sparks plugs looked fine.

Thanks

MikeM
TucsonMike is offline   Reply With QuoteReply With Quote
Old 10-07-2021, 11:20 AM #4
Bad Luck Bad Luck is online now
Senior Member
 
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 2,340
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: 2,340
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 TucsonMike View Post
Thanks for reply but I have already replaced the lower intake manifold gaskets. I should add the bypass and valley were dry. Water pump was dry and sparks plugs looked fine.

Thanks

MikeM
How are you determining that the coolant loss?
__________________
2000 Limited V6 Auto E-Locker
Bad Luck is online now   Reply With QuoteReply With Quote
Old 10-07-2021, 11:34 AM #5
spartacus's Avatar
spartacus spartacus is offline
Senior Member
 
Join Date: Mar 2010
Location: denver
Posts: 2,296
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 offline
Senior Member
spartacus's Avatar
 
Join Date: Mar 2010
Location: denver
Posts: 2,296
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
Wouldnt hurt to test the cap for the correct psi. I believe its rated 15.6 psi. You can rent one from loan a tool program at the big block auto stores.
spartacus is offline   Reply With QuoteReply With Quote
Old 10-07-2021, 12:28 PM #6
3bears 3bears is offline
Senior Member
 
Join Date: May 2015
Location: north east Fairbanks Alaska
Posts: 2,714
Real Name: 3 Bears
3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light
3bears 3bears is offline
Senior Member
 
Join Date: May 2015
Location: north east Fairbanks Alaska
Posts: 2,714
Real Name: 3 Bears
3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light 3bears is a glorious beacon of light
you say you did the lower intake gaskets 3000 miles ago and since have lost 1/2 cup of coolant.....was it all of a sudden ? did you just now noitice and have not really paid attention to it since the intake manifold gaskets ? Maybe it just needed to burp an air pocket.
I had a 2001 for a brief time, it would loose coolant...part of its issue is previous owner had installed wrong radiator cap
__________________
2000 SR-5 Highlander. 4:30's, factory locker green bought 6/21
2001 SR-5... bought 11/20..sold 6/21....
2000 SR-5 V6 Auto . lifted, e locker, other cool stuff, totaled 10/20
3bears is offline   Reply With QuoteReply With Quote
Old 10-07-2021, 01:27 PM #7
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
I have been checking coolant level in the morning and right after I had gaskets replaced I was checking it daily. I'd say the first couple thousand miles I didn't see a drop in coolant and didn't check it for awhile and lately notice it was about 3/8 below the full line when engine is cold. I'll continue to monitor it and see if it drops any further over time.

I might pressure test it as well

Thanks

MikeM
TucsonMike is offline   Reply With QuoteReply With Quote
Old 10-07-2021, 03:44 PM #8
phattyduck phattyduck is online now
Senior Member
 
Join Date: Mar 2016
Location: Pasadena, CA
Posts: 4,247
phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of
phattyduck phattyduck is online now
Senior Member
 
Join Date: Mar 2016
Location: Pasadena, CA
Posts: 4,247
phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of phattyduck has much to be proud of
Quote:
Originally Posted by 3bears View Post
I had a 2001 for a brief time, it would loose coolant...part of its issue is previous owner had installed wrong radiator cap
Been there, done that on multiple Toyotas. A new OEM cap fixed it.

Not saying that is the issue in this case, but also worth checking.

-Charlie
__________________
'99 4Runner SR5 Auto - 4WD swapped
'89 Camry Alltrac LE 3S-GTE 5spd
'17 Chevy Volt Premier
'16 Honda Odyssey Elite
Previous: '88 Camry Alltrac LE 3S-GE BEAMS, 90 Camry 3S-GTE, 90 Camry DX, '03 WRX wagon, '08 Outback XT
phattyduck is online now   Reply With QuoteReply With Quote
Old 10-07-2021, 03:57 PM #9
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
TucsonMike TucsonMike is offline
Member
 
Join Date: Feb 2021
Location: Tucson
Posts: 34
TucsonMike is on a distinguished road
I did by a spare cap and can try it to see. My current cap I replaced over 100k miles ago so I supposed it could be due. Doesn't hurt to try since I already have one

Thanks

MikeM
TucsonMike is offline   Reply With QuoteReply With Quote
Old 10-08-2021, 01:56 PM #10
JustTroItIn's Avatar
JustTroItIn JustTroItIn is offline
Junior Member
 
Join Date: Jan 2021
Location: Detroit
Posts: 18
JustTroItIn is on a distinguished road
JustTroItIn JustTroItIn is offline
Junior Member
JustTroItIn's Avatar
 
Join Date: Jan 2021
Location: Detroit
Posts: 18
JustTroItIn is on a distinguished road
You can get some UV dye and glasses. If the leak is external this should help you locate it.
__________________
2000 Limited w/ rear locker
2000 SR5 4WD Auto w/ J Shift
JustTroItIn is offline   Reply With QuoteReply With Quote
Reply

Tags
coolant , fine , leak , loss , miles

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
2007 v8 - slow coolant leak behind water pump advice Jcmeadows82 4th Gen T4Rs 6 04-28-2019 12:47 AM
Very slow coolant leak 4Runner4TW 3rd gen T4Rs 9 02-02-2016 08:27 AM
Coolant leak solution, pepper, eggs or liquid aluminum stop leak? BUGSEY General Discussions 1 01-30-2014 01:32 PM
Coolant Leak- Drivers side coolant manifold? Shibby! 3rd gen T4Rs 19 12-28-2012 09:37 PM
Coolant leak, whining noise, vacuum leak, alternator, starter, battery issues Max O 3rd gen T4Rs 4 12-03-2009 10:31 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 03:57 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