Hello everyone, got an interesting leak going on. 05 SR5, 4.7L It's on my passenger side towards (I think) the front of the engine. I've ruled out the water pump (replaced with timing belt 20k miles ago), due to the timing cover not having any leaks in it. It isn't the radiator or any of the hoses connecting it to the engine. Are there any hoses/pipes that go along that side or am I looking at a freeze plug?
Coolant Leak on Passenger Side
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702tripgen
New member
Trace it upwards as far as you can, sometimes coolant will kind of flow around stuff and make it hard to tell where it's really coming from. Get to the highest point that is dry and start working down from there.
Condensation from the AC
Isn't there a big coolant container on that side (starboard)?
WP is on that side - but toward the front of the engine.
WPs are notorious for leaking.
If there is water/coolant on your new WP it needs to be checked/fixed.
I have 150,000 miles on my WP and alternator. Both OEM.
Never had a WP last this long.
I have a new one in the garage when the OEM drips.
I'll replace two gallons of new coolant when WP fails!
I have a 2005 SR5 V6. Never had an overheat!
How much coolant are you down? Pint? Quart?
I check my coolant overflow tank every week. (and just now!)
15-year-old 4runner and the "level" doesn't drop even a 1/16 inch in
6 months to a year. 4runner is in Bahamas
where it's hot all year long. You would think some would evaporate, but
Not!
Never had a cooling system in any car this trouble-free.
Hoses rarely fail. Has someone worked on the 4runner recently?
BTW.. What Basturd are you holding in your hand?
Thermostat housing?
Better hope its not a head gasket sucking it into engine.
I'd try a Lucas or BD stop leak before giving it to the dealer.
Read of some going/driving 3 years with BlueDevil stop leak.
Outboard lower units never leak water. They just fail regularly.
Bob T the builder of the Performance 42 died 6 weeks ago at 68.
I ran around in one for 15 years and it never developed a leak or even a
crack. With 3 F225s I could hit 50mph.
Once coming from the Berry Islands (Chub Cay) in a big
sea coming right in our face a 50 foot Hatteras was
in front of me pounding his way to Nassau, and we watched him turn back.
Isn't there a big coolant container on that side (starboard)?
WP is on that side - but toward the front of the engine.
WPs are notorious for leaking.
If there is water/coolant on your new WP it needs to be checked/fixed.
I have 150,000 miles on my WP and alternator. Both OEM.
Never had a WP last this long.
I have a new one in the garage when the OEM drips.
I'll replace two gallons of new coolant when WP fails!
I have a 2005 SR5 V6. Never had an overheat!
How much coolant are you down? Pint? Quart?
I check my coolant overflow tank every week. (and just now!)
15-year-old 4runner and the "level" doesn't drop even a 1/16 inch in
6 months to a year. 4runner is in Bahamas
where it's hot all year long. You would think some would evaporate, but
Not!
Never had a cooling system in any car this trouble-free.
Hoses rarely fail. Has someone worked on the 4runner recently?
BTW.. What Basturd are you holding in your hand?
Thermostat housing?
Better hope its not a head gasket sucking it into engine.
I'd try a Lucas or BD stop leak before giving it to the dealer.
Read of some going/driving 3 years with BlueDevil stop leak.
Outboard lower units never leak water. They just fail regularly.
Bob T the builder of the Performance 42 died 6 weeks ago at 68.
I ran around in one for 15 years and it never developed a leak or even a
crack. With 3 F225s I could hit 50mph.
Once coming from the Berry Islands (Chub Cay) in a big
sea coming right in our face a 50 foot Hatteras was
in front of me pounding his way to Nassau, and we watched him turn back.
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Bassturd
New member
It was super hard for me to see the leak coming from that O-ring. I could smell it for weeks. Couldn’t ever see any puddles under the truck. Finally on a road trip I saw it dripping. It would travel along the intake and down the backside of the head and drip down somewhere around the cats. It was easier to see and look at after I took the air cleaner hose off.
It also leaves a distinct wet puddle that doesn't freeze on the cold (well below freezing) concrete. Unfortunately it isn't the radiator either, as I've checked. It's coming from somewhere close to the engine, bringing it to the stealership tomorrow to get the oil changed and will have them look at it as well. I'd change my own oil as soon as I can find how they can afford to do full synthetic and filter for under 50 for a V8.
Sounds like a bad pump leaking coolant.
A bad head gasket will suck coolant into the engine and blow it out your exhaust.
Try Blue devil stop leak or another top brand. Sometimes they can work for three years.
If it don't work you got a $1500 HG job.
blue devil head gasket sealer - Bing video
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xtremewlr
Member
It's V8, which are not know to have headgasket issues. So very unlikely.
Most likely the waterpump or thermostat housing leaking. You might not need to do the timing belt and just replace the waterpump or fix the leaking thermostat housing.
It’s not a head gasket. No coolant in oil, no overheating. No signs from the exhaust either. Also it’s a V8 so not very likely (I know it happens sometimes)
AuSeeker
Elite Member
WOW, that's not good considering you just had the timing belt done 35,000 miles ago, I would also guess they didn't do the water pump...BUT it's always very good to replace the water pump when doing the timing belt... there's a couple of good reasons to do so, first is you have to do almost all of the same work to replace the water pump as you do to just replace the timing belt, secondly, it appears that the coolant will deteriorate the timing belt if the water pump starts leaking coolant, this happened to one member of this forum, he replaced the timing belt but not the water pump, unbeknownst to him his water pump started leaking but not so much that it made him start looking for a leak, eventually the coolant getting on his new timing belt deteriorated it and it broke which destroyed his engine, piston/s hit valve/s and bent them, I seem to remember that he rebuilt the heads, but I could be wrong and he replaced the engine, it's been a few years ago when this happened and my memory isn't what it used to be.......but the moral of this story is to always replace the water pump when replacing the timing belt...or replace the timing belt when replacing the water pump even if the belt is relatively new since it's been expose to coolant.
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Get it fixed. Have you determined exactly where the coolant is disappearing?:amen:
