2.4 Rattle / Knock noise under load - does yours sound like this?

[Texas Bob]

Thanks, I'll check it out! Has anyone already tried this Amazon/Nonsense-name mat to see if it reduces the noise much and if it appears to be high quality? It has zero reviews as of now. Also, it claims to provide both sound and heat insulation, which makes sense, but is there any risk of excess heat underhood caused by the mat? I suppose not since Toyota installs their own mat on certain models.

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[EastonTaco]

Thanks, I'll check it out! Has anyone already tried this Amazon/Nonsense-name mat to see if it reduces the noise much and if it appears to be high quality? It has zero reviews as of now. Also, it claims to provide both sound and heat insulation, which makes sense, but is there any risk of excess heat underhood caused by the mat? I suppose not since Toyota installs their own mat on certain models.

Yes, installed it two weeks ago. I would say the quality rivals OEM for a fraction of the cost. Cut down on clatter/injector noise as well as hood vibration. Easy to install, no tools needed. I am very happy with the purchase. Doubt there is any heat concern since there is an OEM equivalent on higher end models. In fact I think it will provide heat protection to the hood paint. Highly recommended.

 

[Slappy]

well your link now shows sold out
hopefully they restock

 

[jdmz]

Thanks for this post! I had my Tacoma for 9k miles now and always had this noise. It goes away/less noticable when there is more load and boost in third gear or so. No one had a video that showed this "knocking" noise but this sounds exactly like my engine.

 

[TacoKiwi]

With Direct Injected engines the injectors get real noisy. With my 2016 Chev V8 in a Jeep with a DI motor they are real noisy. Now that I am springing for a 25 Taco I expect the same. Bit like going back to the early diesels - one had to out up with the diesel pre-ignition sound. Does sound go away when you lift the throttle?

 

[MT-Taco]

My last oil change I switched to 5W-30, engine is a lot quieter now. Yes I’m aware Toyota recommends only 0W-20

 

[izzy]

11:1 comp turbo engine is gonna make some noises. High compression turbo with vertical DI is pretty close to being a turbo diesel. The only gas engines closer to diesels are Mazdas Skyactiv, which are extremely efficient.

No reason to not run 91, it'll be quieter, less chance of knock, and you'll probably even get more power.

The increased knock protection is the big reason though.

Wish these trucks had 1GD-FTV but you guys would complain too much

 

[Slappy]

91 octane here ,
Knock ? what knock r u hearing ?
just runs % better
ymmv

 

[BAQ717]

I ran 93 since the first few fill ups and have noticed a big difference. To me it’s a no brainer to use premium with a high compression turbo engine.

 

[izzy]

I wonder if that's the same thing for our tacomas.

Probably since the same engine in Highlanders/Prado sold in UAE is recommended 5w30.. but the Tacoma T24A-FTS variant is different than the other models so maybe something about is designed for the 0w20 the US market is recommended.

I'm for sure running the 0w20 as long as the warranty though, which for me is 125k.

 

[koreanman15]

I finally found someone with the same noise that I was getting. I hear the rattling noise when accelerating and not under a load.

 

[Reconsnake]

I finally found someone with the same noise that I was getting. I hear the rattling noise when accelerating and not under a load.

Try a tank of premium unleaded, 91 or higher. The rattle I heard in mine is now gone, as mentioned earlier.

 

[GaryP]

No need to pay hundreds

https://www.amazon.com/dp/B0DT43Z37...are=cm_sw_r_cso_cp_ud_dp_91M6JD7TEACC06E67W3F

I definitely like the price of Amazon's soundproof mat compared to the one Toyota sells. Just curious, do you feel this made a noticeable difference in reducing engine noise inside the cabin? Also did the Amazon product come with clips/grommets for attaching mat to underside of hood, and did the holes in mat align with corresponding holes in underside of hood, or did you have to drill any new holes ? Sure looks much nicer than the adhesive applied square sound panels.

 

[lauren01]

i went with the plain foil backed foam pads from amazon
https://www.amazon.com/dp/B09MCSZ6G7?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1

and the Victory engine cover with Dynamat on underside.
They both help "somewhat"/

Great idea to add deadening material under an engine cover. Hoping clearance will be ok but perhaps spacers could be added to the cover installation brackets if needed.

I had looked into engine covers recently since having rat diners chew up my ignition coils cost me a tidy bundle…but the covers I found didn’t offer any such protection. My truck isn’t noisy since it comes with a sounding pad under the hood and has the thicker Trailhunter snobby glass. The only noise I could hear was my crying because of the rat damage.

 

[TacoKiwi]

If you put a mike under every modern car hood you would get same or similar sounds. Easiest fix is Dynamat under the hood and it can be applied everywhere so better than those sound mats from the factory. USA has to get used to 4cyl sounds. Unlikely this kiwi would complain as I grew up with 4 bangers.

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