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During the last service period, I noticed that both VCV hoses have cracks at the ends and one of hoses became effectively a rock. Upper ventilation hoses remain flexible but had cracks at each end and were very loose when connected. I ordered all parts from a local Lexus dealer as I get 15% discount (didn't have that until recently). It took a week to get all the parts!
There is a picture what I got. In addition, I ordered a throttle body gasket and a PCV valve tubing. I replaced all involved clamps.
Interestingly, upper ventilation hoses come with all necessary hardware including clamps.
VCV hoses do not include clamps and need to be ordered separately. The hose next the firewall uses different clamps on each side.
I forgot to take a picture of other VCV hose that uses same clamps on both side.
The maintenance is relatively simple and requires removal of upper cover, intake, air filters and its housing. I had to remove the VCV bolt and a harness bolt next to the left ventilation hose to the engine cover. It made it easier for me to remove and install the VCV and the left ventilation hoses.
Last edited by Anfanger; Apr 24, 2021 at 06:21 PM.
I did this like a year ago. While i was removing the intake manifold for cleaning , all these hoses degrade over time and heat. When you try to remove it , it snaps into pieces .
I did this like a year ago. While i was removing the intake manifold for cleaning , all these hoses degrade over time and heat. When you try to remove it , it snaps into pieces .
I have replaced intake manifold gaskets, resealed the valley plate and a ton of other stuff too. But, the hoses were not replaced until now.
I am going to replace small cooling system hoses soon. All large hoses were replaced already.
During the last service period, I noticed that both VCV hoses have cracks at the ends and one of hoses became effectively a rock. Upper ventilation hoses remain flexible but had cracks at each end and were very loose when connected. I ordered all parts from a local Lexus dealer as I get 15% discount (didn't have that until recently). It took a week to get all the parts!
There is a picture what I got. In addition, I ordered a throttle body gasket and a PCV valve tubing. I replaced all involved clamps.
Interestingly, upper ventilation hoses come with all necessary hardware including clamps.
VCV hoses do not include clamps and need to be ordered separately. The hose next the firewall uses different clamps on each side.
I forgot to take a picture of other VCV hose that uses same clamps on both side.
The maintenance is relatively simple and requires removal of upper cover, intake, air filters and its housing. I had to remove the VCV bolt and a harness bolt next to the left ventilation hose to the engine cover. It made it easier for me to remove and install the VCV and the left ventilation hoses.
That was a sweet deal that you got that whole hose kit for 58 Bucks including shipping. Wait, What ??? LOL...
I replaced my upper ventilation hoses in January as well while doing valve cover gaskets and fuel pump gasket kits. Mine were very brittle and cracked coming off.
I replaced small hoses in the cooling system today as a part of maintenance cycle. Also, I replaced the PCV hose and clamps which took forever because I did not remove the intake manifold.
I drained coolant using the radiator drainage valve then I removed following parts:
- Engine harness mounting nuts on the right
- Right filter box
- Metal cooling pipes mounting bolts
- Overflow tank
- Thermostat housing (it made work much easier and faster)
Two hoses connecting metal cooling pipes to the thermostat housing had to be cut to fit. If you try to install as is, hoses will kink and reduce or even block coolant flow. Purging instructions are written on the overflow tank.
VCV, ventilation and cooling systems maintenance
