Hi,

4.7L 2UZ-FE

Engine rattles during hard acceleration. Sound like pistons or lifters. like what a timing chain rattle if the v8 had a chain.

This has been since the motor was factory new.

I use premium (93) mobile or shell gas

Lately I have noticed, rattling under slow acceleration up small hills while the a/c is on, and alot of rattleing when the engine is hot, a/c is on and hard accelerate.

56k on the motor

plugs changed at 30k

Also...

After sitting overnight, when I startup in the a.m. and put it into any gear while holding the brake i get a knocking.

The knocking is definately engine, sounds like lower engine, a lower frequency knock, not like tap or a rattle.

The severity changes depending on the teperature, worse during colder days.

I always let the the motor run for a few min, at least until the needle passes the "c" on the temp gauge before moving.

It lasts for a block or two, or about 2 stop signs, hearing it at each stop sign.


any ideas
thx
Tonedog513

 

try some thinner oil.

 

i was thinking thicker oil?

i don't know alot about oil though lol