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Old 12-30-2018, 02:47 PM #841
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Quote:
Originally Posted by tom4416 View Post
Has anyone ever measured the head and the block for warping? Sure sounds like the head needs to be milled to get everything back to flat. A warped head will just continue to blow gaskets for all time.
My mechanic did. The block was straight. The heads were off by like .00001 mm so they got a light re-touching and had the valve seats and valves cleaned.

So purdy!!

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Old 12-31-2018, 12:39 PM #842
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Quote:
Originally Posted by tom4416 View Post
Has anyone ever measured the head and the block for warping? Sure sounds like the head needs to be milled to get everything back to flat. A warped head will just continue to blow gaskets for all time.
I took mine to a shop and the cleaned them tried them up and put in bee valve seals I bought on rock.
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Old 01-07-2019, 09:52 AM #843
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Quote:
Originally Posted by metramm View Post
8024,

Can you tell us if you know what the coolant system history has been (if you know). Yours would be one of the few 2006’s with a failed gasket.

I’m trying to determine if there is a corelation on coolant system flushes and head gasket failure.

Also, can you provide the date your 4runner was built? That can be found on the drivers side door panel. It would greatly help out this thread.

Thanks much!
The radiator was replaced 2 years before the head gaskets were replaced (fender bender), but other than than I'm unaware of any other coolant system repairs.

It looks like it was made in February of 2006.
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Old 01-11-2019, 12:38 AM #844
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I did replace the cooling system, flushed it out and refilled with factory pink antifreeze each time. Can’t be the cooling system, I ruled that out after the second motor.
Update on motor#3. Cometic hg is holding strong, running perfect 6k on rebuild.

These cometic gaskets are expensive but worth it.
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Old 01-30-2019, 12:09 PM #845
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Man - just got an '05 with 200k on it. Hope I get lucky and don't have to deal with this.
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Old 02-06-2019, 10:38 AM #846
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Hate to say it, but add me to the list ... 2006 Sport 4x4 V6 with 220K miles. Don't have all the specifics yet, but cylinders 4 and 6 were misfiring, coolant was low (although the engine was not overheating) and the shop has made the preliminary determination that the head gasket is blown. Replacing both head gaskets and catalytic converters is going to run me ~$3800.
Forgot to update this with prod date ... 9/05
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Old 02-06-2019, 05:41 PM #847
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Head gasket 06 4Runner replace
just had mine go out at 150K. Private mechanic wants $4k to replace including resurfacing heads at machine shop. Does anyone know if this is less expensive than a dealer would do it?
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Old 02-06-2019, 05:47 PM #848
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Quote:
Originally Posted by albietru2 View Post
just had mine go out at 150K. Private mechanic wants $4k to replace including resurfacing heads at machine shop. Does anyone know if this is less expensive than a dealer would do it?

Would you mind providing details regarding your truck?

Year
Build date (can be found in the door jam of the driver's door)
Past coolant system maintenance history if any?
Cylinder number affected

Is the mechanic going to do both heads or one? For a private mechanic it seems very high. 4k from what I've read is Toyota dealer pricing.
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Old 02-06-2019, 06:41 PM #849
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Originally Posted by albietru2 View Post
just had mine go out at 150K. Private mechanic wants $4k to replace including resurfacing heads at machine shop. Does anyone know if this is less expensive than a dealer would do it?
Mine was about $4k but that also included a new water pump and radiator in addition to the head gaskets and machining. The machine ship also cleaned up all the valves and installed new valve seals (I think). So $4k doesn't sound too out of line, but with the radiator and water pump, mine would have been around $3.5k.
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Old 02-08-2019, 09:16 AM #850
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Quote:
Originally Posted by albietru2 View Post
just had mine go out at 150K. Private mechanic wants $4k to replace including resurfacing heads at machine shop. Does anyone know if this is less expensive than a dealer would do it?
Mine was $3983.72 by a private shop ... that total cost included both cylinder head gaskets (mine was blown between cylinders 4 and 6), machining and both catalytic converters. So $4K for head gaskets only seems high to me. But that was in 2015 ...
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Old 02-08-2019, 02:17 PM #851
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2006 (11/5 Man. date) SR5 4x4
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I was showing all the symptoms in this thread so I decided it was time to get it fixed at 175,000. I originally bought the 2006 having known about the HG issues with the older 4th Gens. Thought I was in the clear until a few months ago when I noticed I was losing a lot of coolant and was starting to have the "waterfall noise" and a rough idle at times when cold.

Luckily for me my buddy is a local Toyota master mechanic and he agreed to do the job for $1,300. smoking deal for sure. My heads were true.

I now have about 5K miles on the new HGs and all is running strong. Hope I can get to 300K now with this maintenance.
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Old 02-09-2019, 01:15 PM #852
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Anyone know anyone in the Knoxville TN area that does the repair that is good?

Thanks,
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Old 02-12-2019, 07:18 PM #853
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Exclamation Might be in the same boat ....
I've got my 2004 4wd SR5 V6 with 158,000 miles in the shop right now after noticing it was losing coolant quickly. Haven't heard the diagnosis yet. The only other symptom was a rushing waterfall type sound when I started it cold, but that only happened once.

(Oh, and I've got a P0430 code for the cat. Great. )

I bought this thing 9 months ago. I've had to replace a caliper that was sticking as well.

I heard Toyota was reliable but so far I'm not really thrilled. I love the way it drives, though.
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Old 02-12-2019, 09:54 PM #854
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The 4th gen 4Runners are reliable except for the head gasket and calipers.

I've been the only owner of my '05 4Runner, I'm at 246,000 miles.

At 160,000 I had the head gasket issue.

I've always had the brake caliper issue. The last time it happened, I forgot to tell them to stick 5th Gen brake calipers on.

I've had part the power steering rack fail and had it replaced with clamps and a rubber hose. The CV boots have been replaced.

Other than that, no problems. I was left stranded one time, 2018. The alternator finally had to be replaced after 13 years. Very reliable and durable beyond the HG issue and calipers. If Toyota did the right thing, they would have done a recall.
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Old 02-12-2019, 10:54 PM #855
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Recently bought a 05 4 runner cylinder 6 coil plug has been replaced as well as water pump not sure how long ago It has 275k on her no symptoms of a blown hg. Would like to be sure before it damages engine what would be the best way to diagnose?
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