2024 Tacoma Shaking Hood

Touché OP. Hope to read more success stories!

 

Did a little experiment to confirm air flow where these gaskets are being placed. I have NOT placed the gaskets; this is the usual pre-modification state. As you can see with my exceptionally complicated experiment (leftover cassette tape material I used for a telltale on a sailboat, and some paint tape), you don't have to be moving fast for air to be sucked in under the hood by the windshield. First few mph they're flickering around a bit but afterwards they're sucked under the hood consistently. There's definitely air movement in. How much cfm? No idea. But it's easy to conclude these gaskets are reducing airflow into the engine bay. Does reducing that cool airflow into the engine bay meaningfully contribute to increased engine bay temperatures, and if it does, is that even meaningful for the engine components? I lean towards yes on both, but looking forward to the, um, dialogue.

https://youtu.be/yvPK_mhteWY

Oh, and 100th post!

 

I have had the rubber gasket on there for a few days. I am driving around in 95 plus degree temps. No change in any measurable temps according to truck sensors. I am good with no more hood shake. Not concerned about air flow and temps. All good from my point of view. Case closed. Thanks again OP!

 

There is air movement, but where is it going? Forward of where the OP placed the seal there is already a seal. It's not rubber, it's flexible plastic. Place a sheet of paper over that seal so it sticks out towards the windshield. Shut the hood then pull it. It's not a tight seal like you get on your fridge but you're not getting significant airflow past it. The air movement you observed is going into the fresh air intake for cabin air not the engine compartment (unless you consider the sealed cowl intake part of the engine compartment).

 

interior ventilation was set to off for the test.

 

Off or on recirculate?

Look under the hood of any other car. The forward end of the fresh air intake is always sealed otherwise when the vehicle isn't moving hot engine air would get into the fresh air intake.

 

off that's it no recirc. no air movement from the vents into the cabin. even if it were on recirc, it wouldn't be creating negative pressure at the outside intake at the windshield base. by definition the draw is from inside the cabin on recirc.

Where do you suppose that air is going when it passes under the hood if it's not into the cabin? hvac is a closed system, no flow into the cabin means no flow in the system.

 

It really doesn’t matter that much not that big of a heat differenc, the point is to stop the hood shaking because Toyota dropped the ball on something so simple. I think that if the air flow was that big of an issue the would of made the vent / scoop operable and added vents but they didn’t just in case I am only adding the middle section with is sufficient to stop the vibration, I will be removing the two side pieces.

 

It doesn't "seal". As the air pressure escapes the back, its causing the high/low pressures under the hood.

Whether it was designed by Toyota to vent out the back of the hood or not, that appears to be what is causing the shake.

 

On my truck, speed and airflow has nothing to do with the hood bounce. If the road isn't smooth, the hood bounces from lack of support on the center of the rear of the hood. On a smooth road, regardless of the speed, the hood doesn't move. The extra mass of the Sport/Pro hoods (scoop) makes the lack of rear support more evident.

 

Mine has a slight shake on highway regardless of bumps

 

Put a piece of this rubber trim in the center of your hood and the shake will almost be eliminated altogether. Well worth the cost…$9.

 

I just checked my wife's 2025 Accord. The engine/hood is sealed (at the rear), no gap between the vent and engine compartment.

 

Do you have a link to the actual part your using. the link in the op dosent go to the part. not near the truck to measure and id like to have it when i get back in town tomorrow to finally get this done.

 

Anyone drive through an automatic car wash with ovehead blowers?... That's when you see the real hood deflection and flutter...

 

$10 Automotive Door Weather Stripping 10Ft Car Door Rubber Edge Trim Seal Strip Gasket with Top Bulb Easy to Install for Car Bus Camper Boat RV Truck Doors and Home Applications

https://www.amazon.com/dp/B0BVVRCVB9

Link to item on Amazon.

 

Looking at the 2 pics, the OP put the weatherstripping in one location, and Snakepilot put his in another…..

which one boys?

 

neither. Don't want to sacrifice cooling when for instance towing uphill. What problem does hood shaking cause apart from shaking itself? Is that actually a problem with the truck or a problem with the driver?

 

Look up AWE exhaust in a Tacoma on YouTube

 

Surprised you didn’t check YouTube and do any research.