Engine noise compared to gx470
12-16-19, 02:23 PM
#16
Super Moderator
Air injection pump on the 4.7L in 470 is located under the intake manifold. On the 4.6L in 460 it is in the front area by the power steering reservoir. That being said timing belt motors typically are quieter. Last vehicle I had with a timing belt was my wife's old '96 Mazda Protege she bought new.
12-16-19, 08:13 PM
#17
Air injection pump on the 4.7L in 470 is located under the intake manifold. On the 4.6L in 460 it is in the front area by the power steering reservoir. That being said timing belt motors typically are quieter. Last vehicle I had with a timing belt was my wife's old '96 Mazda Protege she bought new.
12-16-19, 08:37 PM
#18
Super Moderator
Air pump on mine seems to run 20-30 seconds or so. Perhaps algorithm on 470 was different. IIRC... even air pump operation on '14+ is different than 10-13. I thought there was a shutdown operation on '14+. I'll have to look at what the difference is.
More aggressive fan clutch when cold?
or just comes down to chain versus belt?
More aggressive fan clutch when cold?
or just comes down to chain versus belt?
12-17-19, 05:53 AM
#19
Driver School Candidate
Join Date: Dec 2019
Location: GA
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Recently bought a '13 460 with 67,000 miles on it and also have an '07 470 with 120,000 miles on it. Recently changed t belt and water pump on my 470; air injection pump has been disabled.
Love everything about my 460 and it is far more refined than my 470 but the engine/transmission combination in my 470 is just a peach. Hard to tell which is smoother, both are very quiet in the cabin after initial startup. Outside the car, 460 is louder on startup.
Love everything about my 460 and it is far more refined than my 470 but the engine/transmission combination in my 470 is just a peach. Hard to tell which is smoother, both are very quiet in the cabin after initial startup. Outside the car, 460 is louder on startup.
12-17-19, 07:22 AM
#20
Lead Lap
I feel like I've noticed a difference in sound between Toyota's timing belt engines vs their newer chain timed engines. Sound, as in noises from the engine compartment. They do seem to be louder during cold starts and while standing in front of the vehicle during idle.
This is a general statement when thinking back on experiences of multiple generations of Sequoias, 4Runners, Tacomas, LS sedans, RX's, and GX's of all generations throughout my family.
This is a general statement when thinking back on experiences of multiple generations of Sequoias, 4Runners, Tacomas, LS sedans, RX's, and GX's of all generations throughout my family.
Thread
Thread Starter
Forum
Replies
Last Post
buffykesha
LX - 1st and 2nd Gen (1996-2007)
0
04-04-18 10:25 PM
SecPole14
GX - 2nd Gen (2010-2023)
2
02-14-14 04:25 AM