Re: Pedro the Pajeros’ 4M41 engine rebuild.
I applied the sealant, note the specific routing the manual stipulates around certain bolt holes:
Sealant applied - note how it has to specifically route around certain bolt holes.
Sealant applied - note how it has to specifically route around certain bolt holes.
I then fitted the timing plate. You will have to find some additional bolts of right size and thread to hold it in place until the sealant cures, as it is actually held down by the cast aluminium timing gear cover plate.
Timing plate fitted
Timing plate fitted
Old piston removed from conrod & new bearings
Conrod & Bearings
Conrod & Bearings
Feeler gauge, & rings
New piston, bearings, gudgeon pin, Riken rings, and circlips.
New piston, bearings, gudgeon pin, Riken rings, and circlips.
I then fitted the rings to each specific cylinder gap them correctly. The upper ring need a 0.3mm gap and lower is 0.4mm, I used the piston to insert the rings in order to make sure the ring is square in the bore.
Checking the ring gaps
Checking the ring gaps
0.3mm gap on 1st ring
0.3mm gap on 1st ring
Once I checked the ring gap - (there was only one I had to file 0.08mm to make it fit) I fitted them to the piston. I then aligned the rings at 45 degrees to the gudgeon pin (factory manual spec) and compressed them with the ring compressor tool. The first and second rings ended up having the gaps 180 degrees apart.
Rings on piston with ring squeezer
Rings on piston with ring squeezer
Nicholas Gibson

2005 Gen 3 Pajero 3.2 DiD Auto LWB
Mods:
ARB front bumper, OME, Lynx Bash Plate, Lynx Rock-sliders, Lynx rear steel bumper, Front Runner 40lt Long range tank, Madman EMS2 with EGT, dual battery system, 700FF spots

Corsa 1.4 Club (swambo)


Cape Town

"In my house I'm the boss, my wife is just the decision maker." - Woody Allen
Re: Pedro the Pajeros’ 4M41 engine rebuild.
I then proceeded to fit the pistons. The conrod and piston (piston has a dot) has a mark indicating the side facing the front of the engine. I made sure they all did. Note the rubber tubing I placed over the tread of the conrod studs in order not to mar the cylinder liner or crank shaft journals when installing.
1st piston installed
1st piston installed
After all the piston were in and caps torqued up, I then did a mock-up of the timing gears, idler gear, oil pump, and upper balance shaft to make sure the timing worked out. Note the temporary bolts still holding the timing plate on.
Mock-up fit
Mock-up fit
3 x new 'O' rings to oil pump
3 x new 'O' rings to oil pump
All gears lining up nicely
All gears lining up nicely
Left - Balance shaft Center - Oil Pump - right - main crank gear
Left - Balance shaft Center - Oil Pump - right - main crank gear
Left - main crank, top - timing chain idler sprocket, bottom middle - idler sprocket, bottom right - lower balance shaft.
Left - main crank, top - timing chain idler sprocket, bottom middle - idler sprocket, bottom right - lower balance shaft.
Nicholas Gibson

2005 Gen 3 Pajero 3.2 DiD Auto LWB
Mods:
ARB front bumper, OME, Lynx Bash Plate, Lynx Rock-sliders, Lynx rear steel bumper, Front Runner 40lt Long range tank, Madman EMS2 with EGT, dual battery system, 700FF spots

Corsa 1.4 Club (swambo)


Cape Town

"In my house I'm the boss, my wife is just the decision maker." - Woody Allen
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Once all the gears, idler gears, bushes were lubricated I installed them and double checked the torque values. I then installed the two timing chain guides - still in very good condition. The timing chain followed with the single black link on the timing mark on the lower sprocket - I unfortunately forgot to take a picture of this. I then pulled the chain up as tightly as possible and cable tied them to the two guides at the top for when I fit the cam shafts I do no lose my timing.

I then fit the timing gear cover, again with the correct amount of sealant applied. I also fitted a new front crank seal, again MUCH easier doing it with the timing cover and engine out of the car.
timing gear cover
timing gear cover
Once the cover was fitted I had to fit the front main pulley. The spec says 323Nm on the bolt... Unfortunately my (borrowed) torque wrench only goes to 200Nm, so I did a quick sum for mow much weight I need to put on a 300mm power bar to get the same torque.
323 Nm = 32.93kg at 1000mm
Therefore = it is 109.76kg at the 300mm center of Gedore power bar handle.
(The power bar is 3.333 times shorter than 1000mm, thus you need 3.333 times the mass to do the same work on the shoter power bar)
I weigh 108kg.
Problem solved, i locked the rear crank output with some bolts and a crow bar and simply put all my weight on the power bar a couple of times.
Main crank pulley on 0 Degrees
Main crank pulley on 0 Degrees
All for now. I will post some more pictures tomorrow.
Nicholas Gibson

2005 Gen 3 Pajero 3.2 DiD Auto LWB
Mods:
ARB front bumper, OME, Lynx Bash Plate, Lynx Rock-sliders, Lynx rear steel bumper, Front Runner 40lt Long range tank, Madman EMS2 with EGT, dual battery system, 700FF spots

Corsa 1.4 Club (swambo)


Cape Town

"In my house I'm the boss, my wife is just the decision maker." - Woody Allen
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Nick

Thanks for sharing. I wish you all the best! I wish I had the time and knowledge to tackle something like this on my old Snoopy but sadly I had to pay some company to do it and I just know in my bones they did not take the trouble and meticulous attention to detail that you are doing!

Exciting times! Thanks for sharing. I am fully subscribed to this thread.

CATS

Sent from my LG-H815 using Tapatalk
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
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Re: Pedro the Pajeros’ 4M41 engine rebuild.
Please dont forget to take a video with full sound when you fire it up first time after all this! I just get goose bumps thinking about it already :-)

CATS

Sent from my LG-H815 using Tapatalk
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
Image
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Nick,

Fantastic work. I hope your effort will convince more members that with the correct attitude, manuals and tools most people should be able to do some work themselves. Congrats,

Cloyd
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Hi guys. Thanks for all the kind and positive words. I must say this is a steep learning curve, but the workshop manuals are quite specific in all the tolerances and specs which makes my rebuild somewhat easier as there is no 'guesswork' or assumptions that I need to make in how things get put back in the correct sequence and clearance specifications. I also took loads of pics during the strip as well so if I get stuck I can refer to them.

I will post some more pics later when I get a chance again.

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Nicholas Gibson

2005 Gen 3 Pajero 3.2 DiD Auto LWB
Mods:
ARB front bumper, OME, Lynx Bash Plate, Lynx Rock-sliders, Lynx rear steel bumper, Front Runner 40lt Long range tank, Madman EMS2 with EGT, dual battery system, 700FF spots

Corsa 1.4 Club (swambo)


Cape Town

"In my house I'm the boss, my wife is just the decision maker." - Woody Allen
User avatar
Affiliate Member
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Wow! Great wrk. Your attention to detail will reward you. I don't think even Mitsu workers took that much pride and effort with the original build of the engine.

Keep it going. We are loving this thread.
Peertjies
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Great thread and great work! Hard to find people these days that still have such passion for vehicles. Subscribed.
Re: Pedro the Pajeros’ 4M41 engine rebuild.
Ok more feedback:

After fitting the timing chain, gears & case I had to fit the injection pump again. The timing setup & marks of the pump is CRITICAL to say the least so I could not afford to do it incorrectly. The manual states you need to be at 0 degrees TDC on the crank pulley -done when installing the timing gears. You then need to align a tiny notch on one of the teeth (Red Arrow) on the pump gear with a timing mark on the pump case (Yellow Arrow).
Injector pump timing marks.
Injector pump timing marks.
The pump gear also has a thinner spring-loaded 'scissor' gear on the front of the main gear it to take up any back-lash between itself and the cam-chain sprocket idler gear. This part needs to be locked with a M5x16mm bolt to the main gear to prevent the spring from unloading.

See the manual on locking the pump sub-gear(scissor gear):
Injector pump scissor gear
Injector pump scissor gear
I fitted a stainless steel M5x16mm allan head bolt for ease of access though the small access hole provided in the aluminium timing case, there is not enough clearance space for a conventional bolt with a mini-socket set. Once the bolt is removed, the hole is blocked off by a plug similar to a sump plug with a copper washer.

After doubly making sure my crank timing (O degrees) and pump timing was set 100%, I proceeded to fit the pump. Once installed you can see though the open port that the power steering pump is fitted into if you got it right. If you did the pump gear timing mark would lag exactly one tooth behind the case mark due to the helical cut gear turning as you push the pump into position.
Moved one tooth when fitted
Moved one tooth when fitted
Once pump was fitted and timing checked (again) I had to remove to M5x16 bolt from the hole provided in the aluminium timing case.
Bolt visible on pump gear through port
Bolt visible on pump gear through port
Allan key installed removing bolt
Allan key installed removing bolt
Bolt out
Bolt out
Nicholas Gibson

2005 Gen 3 Pajero 3.2 DiD Auto LWB
Mods:
ARB front bumper, OME, Lynx Bash Plate, Lynx Rock-sliders, Lynx rear steel bumper, Front Runner 40lt Long range tank, Madman EMS2 with EGT, dual battery system, 700FF spots

Corsa 1.4 Club (swambo)


Cape Town

"In my house I'm the boss, my wife is just the decision maker." - Woody Allen
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