Help! Timing Belt Issues

Heads, valves, pistons, rods, crankshaft, etc...

Moderators: Helpinators, Moderators

Post Reply
94SS_Canada
Third Gear
Posts: 851
Joined: Mon May 12, 2008 4:19 am

Help! Timing Belt Issues

Post by 94SS_Canada »

Ive got all the marks on my timing belt when i removed them, Somehow my brother and I managed spinning Both camshafts right individually with no timing belt on when we were changing sprockets, HOW DO I KNOW TO GET THEM BACK THE Way they were!
FastRust
Imprezive
Fourth Gear
Posts: 1428
Joined: Wed Jun 22, 2005 4:07 am
Location: Northern CA

Post by Imprezive »

Don't the sprockets only bolt up to the camshafts one way?
1992 T-Leg = 195whp 197wtq SOLD :(
1988 4Runner RIP
2006 Suzuki DRZ400sm
2007 Miata
1994 Miata
2003 WRX Wagon
2016 Mazda 3
RJ93SS
Third Gear
Posts: 853
Joined: Mon Jan 14, 2008 7:55 am
Location: Vancouver, Canada

Post by RJ93SS »

the sprockets are keyed and marked left and right, when i did mine i had the left spun 3 times and it worked fine when i started it. make sure you started at top dead centre. make sure your have that little bit of slack where your plunger comes out and your 3 lines are proper allighned. whatever you do, make sure you dont overtighten anything because it's alluminum, make sure your pulley's spin freely, change your gaskets and seals proplerly w/ oem seals, and water and oil pump, and tighten crankshaft bolt to 100 120 ft lbs even though your book says different.

goodluck!
93SS 04 wrx brakes/slotted w/ hawks--TD05 -- 06 I/C -- 20mm n/a fsb -- Stage 2 -- 550's -- Perrin DIV DP -- 2-3/4 Tit Exhaust -- K&N -- C/C -- A/C Delete -- Grounded -- GT Leather Interior -- WRX/STI Strut Setup -- 17" 225's -- 2 Kids Seats ;)
94SS_Canada
Third Gear
Posts: 851
Joined: Mon May 12, 2008 4:19 am

Post by 94SS_Canada »

Okay!

I think im sick of working on my car and am getting a non subaru tech mobile mechanic.

Is this a bad idea?

Should i spin the both camshafts so they are both shut, im lost and am past my ability, mechanic it is. I dont want to risk it. Ive got to swallow my pride and let someone else do just this so it is done right, this is the life of my engine in question and all though all this info is extremly info im still a little bit iffy, so mechanic it is.
FastRust
Imprezive
Fourth Gear
Posts: 1428
Joined: Wed Jun 22, 2005 4:07 am
Location: Northern CA

Post by Imprezive »

Wait! no! Re-installing a timing belt is very simply, it looks complicated but it isn't.

If you haven't already had that "mobile mechanic" come do it (and maybe screw it up) here is what you need to do:

1. Spin the engine to TDC, there is a little mark on the crank sprocket that lines up with a mark on your oil pump, when those are lined up its at TDC on the #1 cylinder.

2. If you haven't already, take your tensioner off, and the 2 lower idler pulleys. (at least i think its only two)

3. Put your cam sprockets back on, the one marked "left" goes on the driver side, the other goes on its respective side. You don't need to torque them down yet just snug them up, but don't forget to do it later!!!!!!!!

4. There should be 3 marks on your timing belt, line these up with the marks on both cam sprockets and the crank sprocket. The marks will only line up one was because the 2 marks for the cam sprockets are not equal distances from the central crank sprocket marking. There might even be an arrow on the belt pointing in the direction which the engine rotates (clockwise) to help you figure it out.

5. If you have some vice-grips VERY VERY GENTLY use them to hold the belt onto the cam sprockets (this makes things easier).

6. By now you should have the belt on and all thats left to do is re-install a couple pulleys and the belt tensioner. You are going to want to put on the pulley closest to the water pump first. (I think there might be 2 next to the waterpump, sorry I can't remember!) Then install pulley that is to the bottom left of the block, its a smooth pulley.

7. If you haven't already, compress your belt tensioner in a vice and find a very small allen wrench (or something equally as small and strong) to slip in the small hole to hold the tensioner back when you install it.

9. Install the tensioner then pull out the pin and your almost there!!! Rotate the engine with a wrench or ratchet to make sure everything is ok and nothing is out of time. It'll take a few revolutions to get the marks to line back up with the marks on the sprockets.

If I have forgot anything someone please correct me ;)
1992 T-Leg = 195whp 197wtq SOLD :(
1988 4Runner RIP
2006 Suzuki DRZ400sm
2007 Miata
1994 Miata
2003 WRX Wagon
2016 Mazda 3
93Leg-c
Fourth Gear
Posts: 1886
Joined: Mon Oct 27, 2003 7:17 am
Location: Oahu, Hawaii, USA

Post by 93Leg-c »

By the dates of the above posts, you probably have your timing issues figured out by now but I'll post this anyway.

I know this was discussed in one or more other threads in the past. I'm too tired to search (sorry) but what Imprezive posted sounds correct. Be sure you know what timing marks to look for. If all the marks on the sprockets and timing belt line up, you're good to go.

And, I personally would NOT ask a non-Suby mechanic to work on my engine if he's never done it before. I've seen three good other-than-Suby mechanics attempt to install a timing belt on Subarus for the first time and I could see it in their eyes and their hesitancy in working on our engines that they weren't really sure if they were doing what was right. One master ASE-certified mech even told me repeatedly that he's never worked on Subarus before and he wasn't sure if he was doing it correctly. The mechanic might get it right . . . or he might not.
'94 TW
kimokalihi
Fifth Gear
Posts: 8360
Joined: Mon Nov 06, 2006 3:41 am
Location: Tenino, WA

Post by kimokalihi »

Even if you install it wrong won't it be fine? It's a non interference motor so you won't destroy the valves.

I wouldn't take my word for it but that's what I was told.
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
94SS_Canada
Third Gear
Posts: 851
Joined: Mon May 12, 2008 4:19 am

Post by 94SS_Canada »

The Hybrid moter i have now is an "interference type"
FastRust
Post Reply