Valve sound
03-21-2007, 09:49 PM
Post: #1
Valve sound
Hi there

I have bought my hachi two weeks ago. The previous owner told me that he had rebuilt the engine.

I don't dought about it because the engine works preety well.

But this week every morning when i start my engine i hear a noise like valve knocking till the engine gets to its normal temperature. Then the sound stops (maybe there is a sound but not so loud as in the begining)

Is this normal?

Perhaps my engine oil is wrong. I use 15/40 mineral. I have change it 1000 km ago.

The rebuilt took place 40000 km ago. Should i have to adjust my valves?

Tell me your opinion
Undecided

Toyota Corolla KE30 + Toyota Corolla AE86
Find all posts by this user
03-22-2007, 07:09 AM
Post: #2
Valve sound
I've heard of minor 'valveknock' even on engines that have intrusionless geometry immediately after a rebuild, but i'd say 40 000 km is well enough not to consider it a fresh build.... Don't know, waiting for the gurus to say, i guess..
Find all posts by this user
03-22-2007, 10:17 AM
Post: #3
Valve sound
Could you check whether the noise gets louder after you rev the engine and suddenly close the throttle?

Temperature dependent knock noises always make me think of a conrod bearing failure Undecided

A wheel to steer the front of the car
A pedal to steer the rear
Find all posts by this user
03-22-2007, 10:31 AM
Post: #4
Valve sound
No

If the engine comes to its normal temperature the sound dissapears (maybe it is not so loud)

If i rev the engine and suddenly cut the throttle nothing happens. Everything works normal.

Toyota Corolla KE30 + Toyota Corolla AE86
Find all posts by this user
03-22-2007, 10:47 AM
Post: #5
Valve sound
Use quality oil filter (genuine Toyota is cheap and good). Change the oil too with some like 10-40 semi-synth. IMHO change the oil and filter immediately.
Visit this user's website Find all posts by this user
03-22-2007, 10:55 AM
Post: #6
Valve sound
I do use the genuine oil filter but i'll try different oil

Toyota Corolla KE30 + Toyota Corolla AE86
Find all posts by this user
03-22-2007, 12:37 PM
Post: #7
Valve sound
Try switching from mineral to semi-synth, could make all the difference you need...
Find all posts by this user
03-22-2007, 01:03 PM
Post: #8
Valve sound
Τhis noise, was there from the the first day you took it???
Or it has appeared after a while???

[Image: AEU86 AE86 - Valve sound]
Find all posts by this user
03-22-2007, 01:46 PM
Post: #9
Valve sound
I sense con rod bearing caps .......
If it is , u should change them before the crank gets damaged .....
Visit this user's website Find all posts by this user
03-22-2007, 01:51 PM
Post: #10
Valve sound
@ Akis 308

I haven't notice it from the first day, but maybe i didn' t pay so much attention these first days.

@ gon

I'll check it out man. Thanks a lot

Toyota Corolla KE30 + Toyota Corolla AE86
Find all posts by this user


Possibly Related Threads...
Thread Author Replies Views Last Post
  4AGE Valve Buckets Scored Steller Engineering 2 451 10-06-2023 05:34 PM
Last Post: Steller Engineering
  20 Valve Blacktop smoking after engine flush - why? RolanTHUNDER 2 818 11-30-2022 12:09 PM
Last Post: RolanTHUNDER
  HKS valve springs totta Crolla 3 1,577 05-25-2022 10:24 PM
Last Post: oldeskewltoy
  Valve clearance leon205gti 7 7,916 11-25-2016 03:24 AM
Last Post: oldeskewltoy
  16v oversize valve seats harkes 9 11,317 09-20-2016 05:04 PM
Last Post: oldeskewltoy

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us | AEU86 | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication