Crash Course on 4D56 Timing Belt Replacement (with Pics)

[miked]

This write-up is for informational purposes only....

First is to remove the radiator (& hoses) to give you enough space. Disconnect also the lines connecting the transmission cooler (for automatics). Remove all V-belts (A/C, PS, Alt), A/C tensioner.


Remove the Crankshaft pulley damper using 2 techniques. If you are man enough (not like me), do this one:
wrap a chain wrench on the pulley then use a breaker handle with socket (19mm on these engines). you may need an assistant for this to hold the one wrench


or if you are alone, do this trick: ground the breaker handle to the vehicle frame then one very short burst of the starting motor. voila! crankshaft bolt loosened!:


Remove the crank bolt and the damper pulley. aside from giving power to engine auxiliary systems (A/C, ALT, PS), the crank pulley also serve as a vibration damper. it absorbs and smoothens the power pulses from the engine. Replacement crank pulleys usually costs about P3k (with the key)
rear view of crank pulley

front view of crank pulley

[miked]

Here is the crank bolt which is a high tensile bolt (grade 10 and some are grade 7 marks on the head). bolt is M14 x 1.5 iirc.


Upon removal of the bolt, pulley and lower timing cover, thread back the crank bolt...


and align the timing marks on the camshaft


fuel injection pum


crankshaft and lower (right) balancer


and upper (left) balancer shafts

[miked]

Word of Caution: Always rotate the timing assembly via the power source which is the crankshaft bolt (not on the injection pump or camshaft) or else you'll screw up the timing....some engines also rotate counterclockwise but for this application it rotates clockwise facing the engine.

before removing the cam belt, take the bolt out. the timing may move back so hold it via the fuel injection pump.


To remove the cam belt, remove it following the instructions from the manual sourced from the internet:
that is, loosen the NUT first on the upper tensioner bearing then the bolt on the slot side. Then pry the tensioner using a screwdriver towards the water pump and hold it there by tightening the slot side bolt then nut



Upon removal of the cam belt, follow again the manual by loosening first the lower tensioner bearing's nut and bolt.


Upon removal of the belts, remove the 2 crankshaft sprockets (1 for the cam, 1 for the balancer). the key will also come off. don't forget the key. take note also the direction of installation of the flange. failure to install the flange correctly will snap the belt.

[miked]

You may have noticed, the timing assembly was bathing in oil. the problem was a front crank oil seal ready to jump out of its seat. once the belts are soaked in oil, replace them asap.


the outer diameter of the crankshaft is about 43.95mm...that would be the internal diameter of the oil seal. hope the oil seal will take care of the 0.05 difference. btw, the oil seal size for this one is 44 x 60 x 7 mm.



To remove the seal, pry it out with a screwdriver (with a cloth to prevent marring the shaft or the housing).


Clean first the front assembly

[miked]

I cut and used a spent refrigerant drier filter to push the new oil seal in the housing.


For the reassembly, i have to be cruel. Reassembly is the reverse of diassembly.

Just don't forget to torque every bolt to specs especially the crank bolt (130 ftlbs).

Check the timing by rotating the timing assembly twice or thrice (via the crank bolt) before firing up the engine.

Hope this helps especially to the newbie on this type of DIY.

[OTEP]

Sticky! For Reference Purposes

[davidmiller123]

Hello friends,
i am new on this site.
please tell me how can i help you.

[mitzusu4DJ1]

mga bro how much ang price per piece ng parts para my idea lang ako malapit na akong mag palit ng timing belt

Timing Belt
balancer belt
Oil seal crankshaft
Oil seal Camshaft

thanks....

[miked]

mga bro how much ang price per piece ng parts para my idea lang ako malapit na akong mag palit ng timing belt

Timing Belt
balancer belt
Oil seal crankshaft
Oil seal Camshaft

thanks....

iirc, eto mga prices:

Timing Belt - P1.2k
balancer belt - P0.8k
Oil seal crankshaft - P120 or 400 (better quality)
Oil seal Camshaft - same same

[radz15]

Sir miked yung adventure ko 60k km na tinakbo 2 years 7 months palang. Sabi ng mekaniko papalitan ko na daw yung timing belt pagka 70k kasi madalas daw nagagamit. What do you think sir?

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[b_9904]

I just downloaded the engine's manual covering 1991-1993.

I currently own one since 1992 so lagpas 20 years na siya at gagawin ko syang experiment car na for mods na balak kong gawin sa magiging new car ko after warranty period.

Maraming salamat kay TS for this thread!

PS: Magkano ba spray new nozzle for this engine?

[Tj_abs]

Thanks for this very informative thread. Question, lang po, is it the same procedure for replacing the timing belt of second gen strada 4x4 4d56 engine? Tia

[miked]

Thanks for this very informative thread. Question, lang po, is it the same procedure for replacing the timing belt of second gen strada 4x4 4d56 engine? Tia

yes sir. virtually the same.....iba lang siguro ang teeth count ng balancer belt (83 or 99 teeth). atsaka teeth profile (rectangular or round) sa t-belts.

[hitokiri1]

thanks po dito. same din po eto sa mitsu adventure 08 diba?

[bfi1234]

Naputulan po ako ng timing belt, what do I expect sa unit ko (Montero 2010 model), currently, nasa CASA for estimate...thanks po...

[miked]

Naputulan po ako ng timing belt, what do I expect sa unit ko (Montero 2010 model), currently, nasa CASA for estimate...thanks po...

bukod sa timing belt na papalitan e ipanalangin nyo po na valve lang ang may tama or tappet (kung meron man iyan). worst case scenario e dented pistons, bent or broken connecting rod, bent or broken crankshaft (brand new engine na katapat ng mga ito or overhaul).

hmmmm...2010. usually 6 years tinatagal ng rubber so i assume hindi pa napalitan iyan since 2010 (tama ba ako?).

[crazy_boy]

Naputulan po ako ng timing belt, what do I expect sa unit ko (Montero 2010 model), currently, nasa CASA for estimate...thanks po...

ano milage ng car? high revving ba parati?

[miked]

thanks po dito. same din po eto sa mitsu adventure 08 diba?

yes. basta yung diesel yang adventure po ninyo.

again, sa teeth profile at balancer belt teeth count nagkaiba. newer models ng conventional 4d56 ay semi circular na ang teeth profile at 99 teeth ang balance belt, kung tama ang aking alaala.

[Tj_abs]

yes sir. virtually the same.....iba lang siguro ang teeth count ng balancer belt (83 or 99 teeth). atsaka teeth profile (rectangular or round) sa t-belts.

Thank you sir

[BAKERO]

any recommended shop to do this? I'm actually due for timing belt replacement (based on the manual of 60k - 80k) ... baka meron naman sa inyo mga list of parts to buy sa casa??