who has had coolant leak around valley plate?
12-03-16, 06:22 PM
#77
Add me to the list! I added coolant last week Friday. It was full and stayed full for a few days. While the car was cold and went it got to operating temp. I checked it today, and it's sitting in the low line. This is issue is simply irritating! Whatever sealant they're using ain't worth a crap. Good thing I'm still under the power train warranty and got a cpo to 100k.
12-03-16, 07:32 PM
#78
Pole Position
Lexus should've used a gasket instead of sealant?!
That's what the master tech said when he fixed mine, said that a gasket would've been a logical choice and doesn't understand why they would use sealant in this high performance application based on what temps these cars see when being tracked/driven hard etc..........
Here's hoping they issue a recall at some point for the ISF/LS460
That's what the master tech said when he fixed mine, said that a gasket would've been a logical choice and doesn't understand why they would use sealant in this high performance application based on what temps these cars see when being tracked/driven hard etc..........
Here's hoping they issue a recall at some point for the ISF/LS460
12-03-16, 09:02 PM
#79
Lexus should've used a gasket instead of sealant?!
That's what the master tech said when he fixed mine, said that a gasket would've been a logical choice and doesn't understand why they would use sealant in this high performance application based on what temps these cars see when being tracked/driven hard etc..........
Here's hoping they issue a recall at some point for the ISF/LS460
That's what the master tech said when he fixed mine, said that a gasket would've been a logical choice and doesn't understand why they would use sealant in this high performance application based on what temps these cars see when being tracked/driven hard etc..........
Here's hoping they issue a recall at some point for the ISF/LS460
12-04-16, 09:07 AM
#80
Pole Position
The only thing Lexus did is go to a "new and improved sealant which is supposed to work well against coolant" which has a new part # compared to the original sealant that was used from the factory when the engine was put together. Lexus apparently saw that there was an issue and tried to fix it by a "stronger" sealant. I don't really consider it a fix as the sealant probably will break down over time depending on how the car is driven??
No I never had the chance to snap a photo of the valley cleaned up before he put it back together, but assured me that it was cleaned up before he put everything back together.
No I never had the chance to snap a photo of the valley cleaned up before he put it back together, but assured me that it was cleaned up before he put everything back together.
12-04-16, 06:29 PM
#81
Tech Info Resource
iTrader: (2)
The sealant doesn't "break down" per se. The parts expand and contract at different rates which causes the sealant to get torn and start to leak. They would have been way ahead to put a rubber gasket on it, or at least a very large o-ring type gasket. They are a lot less susceptible to failure when the parts are not expanding and contracting at the same rate.
I just checked the part number for the heat exchanger and did a search for applicable models. This part has not changed from the ISF to the RCF to the GSF, so Lexus seems pretty confident they've fixed the issue with the new sealant.
I just checked the part number for the heat exchanger and did a search for applicable models. This part has not changed from the ISF to the RCF to the GSF, so Lexus seems pretty confident they've fixed the issue with the new sealant.
Last edited by lobuxracer; 12-04-16 at 06:37 PM.
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12-04-16, 07:38 PM
#82
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I hope I don't have this issue... losing coolant slightly with no visible leaks. When it was low I wasn't getting any heat at idle.. topped up and it has heat at idle but just checked and it's low again.
12-04-16, 08:32 PM
#83
Sorry guys but the symptoms everyone has been describing sounds like Valley plate leak. I too lied to myself for over a year before it went full blown pink down the back of my motor.
Since the repair, it's been at the full mark 24/7 regardless of temp.
Since the repair, it's been at the full mark 24/7 regardless of temp.
12-05-16, 01:49 AM
#84
Pole Position
Interesting...... If the part hasn't changed I hope they're (Lexus) right about the new sealant working long term for ISF owners who've had the new sealant/repair done and no issues coming up for RCF/GSF owners....
12-05-16, 04:47 AM
#85
Do you need to be under the car to see the pink or can you see it in the back of the engine bay? Mine has stayed at the same level for a few months now so hopefully I'm safe but it did get low at one point.
12-05-16, 05:32 AM
#86
It's really tough to see it from above. If you stand next to the battery and look in front of the firewall you may be able to see it; you'll have to look past all the hoses. Once it's leaking out you should be able to from underneath. It was running down my transmission and headers. I got photos in floating around cl somewhere.
12-06-16, 04:10 PM
#88
Tech Info Resource
iTrader: (2)
08826-00100 is the Lexus/Toyota/Scion part number. It's pretty pricey at ~$65 a tube from e-tailers on the net. MSRP is $89.64. It is specifically for coolant.
