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1G 4G63 Timing belt install

spoolnsincal

Probationary Member
2
0
Feb 21, 2010
modesto, California
im completely to putting in timing belts in cars. Putting an engine together is easy, timing scares me and can be costly if you don't know what you are doing like me. I want to learn all I can about these engines, but I need to start with the install of the timing belt and balancing shaft belt. I don't know what tools I'll need or how to line everything up. All information and advice will be much appreciated.
 

iugrad92turbo

Supporting Member
12,729
712
May 22, 2007
Kalamazoo, Michigan
check vfaq, its one of those jobs if you dont get it right, youll spend more than what it costs to pay someone to do it. It can be done did mine the first major job, The best thing is to search for timing belt install but the best 20 bucks can be the chilton book at your local auto store.
 

Speedcult

Probationary Member
32
1
Mar 23, 2009
Mesa, Arizona
Honestly, if you've ever done a timing belt, it's not bad. The worst is the amount of room LOL... or should I say LACK of room. Seriously though, it's not that bad. I've NEVER changed a t-belt on a dsm until my water pump started leaking. I didn't have a guide or access to a computer (in between states) and just a few hand tools. Took me a couple hours in the parking lot of Autozone to swap the pump and belt. I have done timing belts on v6 legends, dohc hondas, etc. and this job on a 1-10 scale of difficulty is about a 4.

The best advice if you tackle it yourself, read everything you can until you understand it. Go slow and ask any questions BEFORE you try to figure it out. We've all been there once and it will take some time... but you can do it.:thumb:
 

Chapmanwired13

Proven Member
37
2
Aug 4, 2018
Mandan, North_Dakota
Is there another way to make sure oil pump is where it needs to be? Can exactly get to that bolt on the back of the motor. Its a one owner car and no room. I only have a few hours left to get this done. I hit a deer in my daily driver and this is the only car I have to drive to work now. Please help
 

pauleyman

DSM Wiseman
7,062
2,022
Nov 19, 2011
oklahoma city, Oklahoma
Is the car put together now and correct? If so you just line up beforehand and then work from there. If not and the seals aren't super new you can tell which way the balance shaft is oriented because the sprocket will fall towards the mark or away from it if that makes sense. Like....if you line up the mark and then move the sprocket a little bit either way it will try and return to the mark on its own or it will fall away from it. If it returns on its own its right.
 

Chapmanwired13

Proven Member
37
2
Aug 4, 2018
Mandan, North_Dakota
I'm not 100% it was correct. I know everything else was. But when I don't the timing belt on it a few months back I just lined up the oil pump with the mark because I couldn't get to that bolt, I cam but it's so tight and I can't get any leverage. So I just timed it with marks and hoped for the best. Well my water pump got lost in shipping and didn't get it until 3 weeks ago. Anyways the car ran fine but waterpump started leaking so I just parked it until I got time. Still never was sure I got the oil pump right tho. Now it's gonna be my daily so I have to make sure it is correct
 

pauleyman

DSM Wiseman
7,062
2,022
Nov 19, 2011
oklahoma city, Oklahoma
Follow my advise above. I haven't loosened one of those bolts in a long long time. If seals are very new this method works poorly.
 

Mech Addict

Supporting Member
679
250
Jun 9, 2019
Jackson, Wyoming
I thought the trickiest part was getting the crank bolt off and on, due to the high torque involved. An impact wrench helps with the “off” part, but you’ll still need to hold the thing still when you retorque the bolt later. RTM ( vendor on this site) sells the right tool (which I have, now!). This, along with those Jay racing tools makes it pretty straightforward. Setting the tensioner pulley took me several tries to get right, but checking with the drill bit will at least tell you when its good or not.
Also, search this site and check the many posts describing how folks needed help when they took a wrong turn. You might find one or two of mine.:aha:
 

DSSA

Supporting Vendor
496
233
Jul 26, 2002
Hatfield, Pennsylvania
The biggest thing I've preached over the years about this job is not just the "methodology", but the tensioning aspect. The hydraulic tensioner is the ultimate piece in this equation. Learn how what it does, how it works, and the rest of the job becomes crystal clear.

Let the tensioner set the belt tension. The pulley sets the ballpark. "Perfect" with said pulley would be when you can crank it over by hand with the pin pulled, and easily re-install the pin.

Too much tension will push the plunger back in. This is BAD.

If the plunger on the tensioner is just *slightly* upwards from the set point, you're losing a TINY amount of travel, but I've yet to see a 4G come in where the tensioner (set correctly at install) has used up all of the ability to tension without the belt snapping first.
 
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