While i have no doubt it is good to replace coolant, the root cause seems an overheating event to me. Overheating resulting in a warped block and coolant able to get deeper into the gasket.
The Car Care Nut talks UR V8 blown head gaskets (3 Viewers)
- Thread starter dudemancool1904
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Doubtful you would be able to continue driving 10k to 100k miles symptom free if this was due to a overheat especially one bad enough that it warped the block or head.
Stupid question but why can’t you just mill the block if it’s slightly beyond spec? You can mill a head
It is clear that there are many shades of grey to an overheating event.
It actually does not make sense that some pH 6 or 5 coolant eats up a gasket on an engine which is not warped.
Letting this all sink in, IMO the CCN has gone of on a wrong angle making us all change coolant more often. Change it but not overdo it. More important IMO, stop driving immediately when the engine temp goes well above normal and fix the issue before proceeding.
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this is a great deal also. Not sure if LCs require a friction modifier, but could be used with confidence as a top off or with limited slip additive. Do you know if LCs need a limited slip?
I use this for the gear drive on my excavator, and in my 1986 M1008 truck
Bad/old coolant does seem to eat gaskets in case of water pump leak where it leaks around gasket instead of weeping hole.
That is absolutely silly. You are just asking for a big ass can of worms to blow up right in your face. If any auto manufacturer ever called out head gaskets as an interval change or maintenance item, it would be ridiculous. Funny enough, it would neither be under warranty either. If Toyota did that specifically, it would be the end of their company, unless someone made a setup where it was easy to change, as easy as a spark plug.
How about, lets change the torque convertor before it blows, or better yet lets change the pinion gear in the rear end before it grenades.
IMO, once you get into head gaskets, you might aswell pull the motor, and reseal the rear main, and oil pan, and everything else. Makes the whole job better and easier on a stand.
all of these problems could be made to go away if Toyota would have learned a bit from US light truck makers like Gm, and made the block cast iron, and the head aluminum.
i has to do with the cylinder sleeves, or so they say. I think the block could be planed by hand a bit while the block was in the car, with a straight block and sand paper, a couple swipes would likely be 1\2thou or less.
Planing is how they make beds for lathes, there is no better way to make a "flat surface" IMO.
That is a rotating seal vs a static torqued down head gasket, quite different.
That is absurd do a 22 hour job as preventative maintenance come on, you could pressure test the coolant system as I said before.
With that logic you might as well replace the transmission and transfer case as preventative maintenance, throw the rear end and ahc in there for good measure also.
In my opinion v8s last longer because they have to work less to do the same thing as a 4 cylinder or 6 cylinder there also usually more tq oriented which helps things get moving.
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So legitimate question if the coolant is so acidic why do other toyota/lexus vehicle not pop headgaskets all the time if his theory is true.
Chill bro. I agreed with bloc and said it was probably excessive and only worth even considering if coolant history was suspect or confirmed inadequate. I think you are missing some context. start here
I’m not taking about leak from weeping hole, water pump also can leak from the same metal gasket which is similar to HG. For reference, see CCN video on water pump replacement. It start leaking very similar to HG.
espcially when the gasket is stainless steel, and the block is aluminum
Exactly. Letting it all sink in I believe the root cause of all this upheaval is more likely overheating due to pre 2018 radiators or water pumps going out.
Also the much discussed valley leak can be result of that and not necessarily an inherent weakness or manufacturing issues as stated by the CCN.
Nothing to chill, it is just typing lingo. We are just all having a conversation. Silly is a descriptive word I use for the viewpoint, not you personally of course. Look at it this way. If the previous owner did not change the gear oil until 150k, and you bought it at 151k, would you suspect an issue with the gears? No, not likely, unless there was a tangible reason, like a whine or vibration. You would change the fluid and call it good, until it wasnt. That is my point.
A HG failure, is a failure, and sometimes goes unnoticed for a long time. Especially if there is no overheating. Not until you notice your oil level going up, or coolant came back from an oil analysis. Then, the question would be current oil pressure, and oil change intervals until it died, at leaat it would be for me. then new engine.
In this case, with CCN and his customers 200k engine, I think he has really done his customer a diservice and led him down a rabbit hole that is not warrantied, and expensive. An replacement engine is not 20k like he said.
One CCN example, will need to look at this further
Galvanic corrosion - When stainless steel and aluminum are in direct contact, the stainless steel acts as the more noble metal and resists corrosion, while the aluminum corrodes faster.
Maybe I miss understand the point you made. Seems from this the head gasket made of stainless steel would maintain its integrity.
The fact that headgaskets don't blow all the time on toyota/lexus proves what he said is false.
A used motor is $5k-$7k not 20k I stand by my statement of him spreading misinformation and being a clown
A used motor is $5k-$7k not 20k I stand by my statement of him spreading misinformation and being a clown
