Mitsubishi 4G54 top overhaul

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gunnerzz

1,500 RPM

gunnerzz

1,500 RPM
Jul 3, 2014
1,796
562
713
34
Melaka
the good thing DIY.. everything can be inspected and cleaned properly prior to re-install
Agreed, last Sat drove the Pajero for 'slight' offroading while trying to find a piece of land which we failed.

Then upon reaching home go offroading again at a construction site. 4L is just amazing.
 

gunnerzz

1,500 RPM

gunnerzz

1,500 RPM
Jul 3, 2014
1,796
562
713
34
Melaka
Those days they got by sound. If chain loose/elongated , will have noise
usually can feel performance drop, sluggish low end, noise, and usually around 200-300k timeframe
The noise is significant so i guess better change it. The engine also have a 'silent chain' which i think runs the oil pump.

My bro ask spare part shop and was quoted slightly below RM500 for the timing chain + guide and silent chain.
 

gunnerzz

1,500 RPM

gunnerzz

1,500 RPM
Jul 3, 2014
1,796
562
713
34
Melaka
Update,
My bro changed the timing chain, silent chain and their sprocket. Tensioner also changed. There are groove on the chain guide and tensioner. Will post pic later.
I wonder why we did not detect this during the top overhaul.

Last saturday i went to see the car and notice he was working on it and i thought he was putting everything back together. I was surprised when he said he was removing everything back as the engine cant be started and backfire thru the exhaust despite cranking just fine.

He suspected the installation of the timing chain is done wrong but this does not make sense as all the pulley have marking. Thus, in goes the long screwdriver into cylinder one to find TDC just in case the marking is off. The marking on the crank pulley match the TDC for cylinder one thus we conclude that installation is correct.

Next is the distributor, we removed the cap to see the position and it was off by 180 degree. This makes the sparks being sent to the wrong cylinder and at the wrong time. We make the necessary adjustment and engine starts on second crank.

Why not first crank? because my bro forgot to remove the ratchet which is on the crank pulley bolt and it flies off hitting the water pump pulley producing noise as if the engine exploded when we crank the engine. 1 bolt at the pulley holder broke off.

Engine is super quiet....
How much does it cost?
Timing chain+silent chain+their pulley+tensioner is abt RM 380.
 
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brokenjars

Known Member

brokenjars

Known Member
Jun 7, 2012
160
10
518
Kedah
Update,
My bro changed the timing chain, silent chain and their sprocket. Tensioner also changed. There are groove on the chain guide and tensioner. Will post pic later.
I wonder why we did not detect this during the top overhaul.

Last saturday i went to see the car and notice he was working on it and i thought he was putting everything back together. I was surprised when he said he was removing everything back as the engine cant be started and backfire thru the exhaust despite cranking just fine.

He suspected the installation of the timing chain is done wrong but this does not make sense as all the pulley have marking. Thus, in goes the long screwdriver into cylinder one to find TDC just in case the marking is off. The marking on the crank pulley match the TDC for cylinder one thus we conclude that installation is correct.

Next is the distributor, we removed the cap to see the position and it was off by 180 degree. This makes the sparks being sent to the wrong cylinder and at the wrong time. We make the necessary adjustment and engine starts on second crank.

Why not first crank? because my bro forgot to remove the ratchet which is on the crank pulley bolt and it flies off hitting the water pump pulley producing noise as if the engine exploded when we crank the engine. 1 bolt at the pulley holder broke off.

Engine is super quiet....
How much does it cost?
Timing chain+silent chain+their pulley+tensioner is abt RM 380.
Very cheap. How much for labour?
 

gunnerzz

1,500 RPM

gunnerzz

1,500 RPM
Jul 3, 2014
1,796
562
713
34
Melaka
This is the tensioner...notice the groove?
Thats how much it has worn out. The chain guide also have groove but not as deep as the tensioner.

I dont have the chance to compare the chain but my bro said the length is very much the same but the old chain have more freeplay laterally.
 

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