wat is "TEPET" sound?? can explain to me?

[avaultz]

as title above....

lot ppl discuss bout tepet sound... But is it actually? where the sound came from?:confused_smile:

-Ppl said always happen in 4g93t??
-they said change to mivec head sound will gone??
-change engine oil??
-do overhaul?

i wanna know more bcoz im planning to buy 4g93t for my car...:regular_smile:
sry for asking silly question.. but im a newbie in engine modifications..

btw lots of ppl said gsr ecu (5663) always burn???:secret:
they said (7377) n (3308) wont burn down so easily.... it that true...
y got so many type of ecu for gsr???

rumors said also gsr gearbox very hard to enter 1st gear... it that true too?

n wat is the meaning of "bleeding"?? can any1 explain it to me???

plz giv me some info bout 4g93t...
thx

 

[acbc]

It's 'tappets' and it is very common on all Mitsubishi engines and it is by design. Why? Because, Mitsubishi uses hydraulic tappets. The annoying sound will occur if the engine oil is low or dirty. Advice to flush with cheap engine oil every 20,000kms (those RM 30-40 ones) and put quality oil later (such as Motul 4100 Power).

 

[kher]

Trademark of mitsubishi engine i call it.

 

[avaultz]

oh thx for the info guys....

btw how bout those rumors on ecu's n gearbox? any advise?

 

[calvin9683]

everyone's driving habits differs....
same goes to engine....

if u edi hav the plan to transplant gsr....
y not just go ahead.....
the mech will definately ensure the car is ok b4 handing it over to u.....
then from there u'll b on ur own.....
mayb u wont b experiencing these probs at all???
or mayb other probs will surface???

use it n learn along the way.....
heehee

just my 2 sen la....
anyway can ignore my post if u think it doesnt make sense....

 

[avaultz]

ur post does make sense....

but when i realize how bad the engine by that time my money will consume more...lol

that y i trying to gain some knowledge bout this engine b4 i regret till forever as i planning to use this car to 5-6 years time..lol

 

[g88]

I would said it more common to Mitsubishi 4G9x engine especially DOHC.

 

[g88]

Noisy Tappets
Cars affected:
All hydraulic tappet cars (Lancer 1800 RS )/GSR, Evo 1-7)

Symptom:
A noticeable ‘ticking’ noise from the top of the engine. Usually appears when starting the engine from cold but can persist.

Problem and cure:
The noise is caused by air being trapped in the Lash Adjuster (Hydraulic Tappet). Normally the high-pressure chamber in the Lash Adjuster should contain oil but due to various reasons (listed below) the oil drains away leaving only air present. This causes the adjuster to become compressed. The compressed adjuster does not take up the clearance between the roller rocker and the cam lobe correctly when the valve is opening meaning a ‘ticking’ can be heard. It may take a short period for the air to be expelled after starting the engine so some ‘ticking’ noise is acceptable however, if the noise lasts for a long period or doesn’t go away at all then there maybe a problem.
Air can be trapped in the adjuster due to several reasons that are listed below:
- Incorrect grade of oil used (too thin or thick).
- Old oil (debris in the oil may block an adjuster).
- If the car is stood for a long period or if it is stood on an incline (the oil will drain -from the adjusters).
- Over filling the engine with oil (if the oil level reaches the crank it may churn air into the oil that will migrate to the lash adjusters).
If the tappet noise does not disappear soon after start up (5-10 seconds) then try some mild racing of the engine. Gradually increase the engine speed to 3000rpm (over 30 seconds) and then gradually decrease it back to idle (again over 30 seconds). Repeat this roughly 10 times. If the tappet noise disappears then the air has been expelled from the Lash Adjusters and they are working normally again. It is worth checking your oil level and condition as that maybe the cause of the air entering the Lash Adjusters in the first place. Change your oil if in doubt. Make sure you use the correct grade of oil as going too thick or thin can make matters worse. Mitsubishi quote 10W30 as the correct grade of oil to use. If an oil change makes no difference then the adjusters are either blocked, worn (spring inside becomes weakened) or damaged and will require cleaning or possible replacement. Garages will normally replace them as it is more cost effective than cleaning and usually they will replace the whole set of 16. A competent home mechanic can clean or replace the Lash Adjusters. If in doubt consult your servicing agent.

 

[avaultz]

ah....

thx bro g88...
very good info... bout how bout the ecu's??

 

[g88]

ah....

thx bro g88...
very good info... bout how bout the ecu's??

What car u driving actually ? Tappet sound got nothing to do with ECU wor...

 

[satria 770]

like gsr is common right
but what about mivec
mine also make sound
must i adjust it
but what is the correct clearance for both
exaust n intake
just asking bro
tq...

 

[potssum]

this is how your tepet will look like:
http://i23.photobucket.com/albums/b371/potssum/auto lash/auto_latch.jpg

and this is the location of your tepet :
http://i23.photobucket.com/albums/b371/potssum/auto lash/autolatchlocation.jpg

few months ago i fitted my car with a pair of R3 stage2 cam... in order to compensate the gap(regrind cam ).. they will insert a metal shim under your tepet... but with single shim inserted the tepet sound still arise(for my car) finally last weekend i decided to insert another shim on each tepet and walla... no more tepet sound for me... :)

 

[avaultz]

bro potssum.. how much the cost for the single shim u talking bout?

 

[avaultz]

What car u driving actually ? Tappet sound got nothing to do with ECU wor...

yes i know got nth to do with ecu...

im just asking do u hav any tips/ advise bout the gsr ecu only..lol

cheers

 

[potssum]

for me i just pay RM50(shim+labor) the first set is included in the package when i install my cam.

 

[AIRWALK]

My engine is 4g15, and it has the 'tek tek tek' sound after adjusting the valve. I wanna ask all the sifus here that what is the problem actually?
But based on my notice, the sound is form the fuel injector...is it possible?
Thanks^^

 

[AIRWALK]

bring the post up...

 

[dkvcopy]

Yes Airwalk... it could oso be the fuel injector. Cars like kenari & MYvi...velly easy to hear it. Sometimes it's not the tappet or even the fuel injectors it can be other problems like tek tek tek sounds coming from under the engine near the oil pump area. Coz m getting this tek tek tek noise now.

 

[tofu_manic]

mine not tek tek tek but tok tok tok le

anyways airwalk, if you only hear the sound right after your mech played around with your valves, then my 2 sen guess is dat it is your valves needing readjustment again...

 

[zzainudin]

tepet sound for mitsubishi 4G9X series i think normal...
mine's every morning can hear it after warming up it's ok..no sound..

:)