Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E30 (1983 - 1991)
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-24-2009, 12:40 AM   #1
davericher20
black and blue
 
davericher20's Avatar
 
Join Date: Dec 2006
Location: 2 storey 3 bedroom 1 car garage
Posts: 3,585
new problem with t-belt

so got the new timing belt on with the help of jays325is but there was too much slack on the right side....from the power steering side to the crankshaft.....if that makes sense.

there's alot of tension from the bottom of the crankshaft to the tensioner, but too much slack on the other side........need the slack to be on the other side where the tensioner is.

When we started (before the removal) the lines didn't match up perfectly even after like 5 revolutions we did it, but said f-it because they weren't gonna match up. it looks like we need 1 more tooth somewhere and it will give us what we need.........

need alot of help. I want this done and over with.

anyone?
__________________


Quote:
Originally Posted by JINT View Post
Some people have serious track experience from the cruise, so what is fast to you, isn't fast to them.
davericher20 is offline   Reply With Quote
Old 06-24-2009, 01:47 AM   #2
juzer
7000 RPM
 
juzer's Avatar
 
Join Date: Mar 2009
Location: toronto
Posts: 192
take it out and do it again, untill it match . what kind of belt you got, conti?
__________________
juzer is offline   Reply With Quote
Old 06-24-2009, 01:51 AM   #3
juzer
7000 RPM
 
juzer's Avatar
 
Join Date: Mar 2009
Location: toronto
Posts: 192
This may help if you dont allready have it:

http://www.pelicanparts.com/bmw/tech...iming-Belt.htm
__________________
juzer is offline   Reply With Quote
Old 06-24-2009, 07:15 AM   #4
Ceeker
Parts hoarding partner...
 
Ceeker's Avatar
 
Join Date: Nov 2007
Location: Toronto
Posts: 3,209
Timing marks should line up no matter what. it recommends that you rotate the crankshaft 2 complete revolutions to make sure you have true top dead center on cyl 1. Then rotate the cam shaft to match the timing mark on the crank. I had the same problem with the timing belt. You may have put the timing belt around the wrong side this is why it was taught at one end and loose on the other. Hard to explain but the diagrams provided by the previous gentleman should show clearly how the belt loops. Also make sure you have the tensioner adjusted correctly. You should be able to turn the belt approx 90 degrees to either side once everything is set. Don't over tighten or your likely to prematurely wear it out and you'll get a whining noise from it telling you it's too tight. if I find anything on it I'll add the link.

http://www.angelfire.com/blues2/bimm...imingbelt.html

Check here to see if this helps.
__________________

I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!

Last edited by Ceeker; 06-24-2009 at 07:24 AM.
Ceeker is offline   Reply With Quote
Old 06-24-2009, 08:31 AM   #5
supernaught
6th Gear Member
 
supernaught's Avatar
 
Join Date: Aug 2006
Location: Peterborough
Posts: 1,318
Send a message via MSN to supernaught
the links are pretty thorough, but to answer the slack question more directly, you will need to put your 22mm wrench or socket on the crank and carefully rotate it CCW until the slack appears on the tensioner side. But you should only be doing this in order to re-line up the timing marks(move the belt a couple teeth on the cam pulley).
__________________

88 325IX TOURING DiamantSchwarz|89 325IX AlpinWeiss|88 325IX DiamantSchwarz
supernaught is offline   Reply With Quote
Old 06-24-2009, 06:50 PM   #6
e30jones
3rd Gear Member
 
Join Date: Mar 2004
Location: Lindsay, ON
Posts: 312
Did you count the number of teeth on your old belt and new belt to make sure they are identical? IIRC, there are two different ones, some have one more tooth than the others.
e30jones is offline   Reply With Quote
Old 06-24-2009, 08:07 PM   #7
BmW1819
6th Gear Member
 
Join Date: Feb 2007
Location: Pickering
Posts: 2,706
send me a pm
BmW1819 is offline   Reply With Quote
Old 06-24-2009, 08:57 PM   #8
Ceeker
Parts hoarding partner...
 
Ceeker's Avatar
 
Join Date: Nov 2007
Location: Toronto
Posts: 3,209
If you got the correct belt which there is only one for the M20 then it should fit.
it's next to impossible to fit a shorter belt on even 1 tooth off. it's a very very tight fit to get it on. Even if you a belt with one extra tooth shouldn't matter this is why we have the belt tensioner. once the belt is on - you should rotate the crankshaft two complete revolutions to make sure the marks line up. Otherwise you may have put the belt on but with a tooth off. that could happen. shorter or longer belt? no difference.
__________________

I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
Ceeker is offline   Reply With Quote
Old 06-24-2009, 09:50 PM   #9
Red_Rocket
2nd Gear Member
 
Red_Rocket's Avatar
 
Join Date: Aug 2007
Location: Shitby
Posts: 153
Start at the crank and route the belt around counter clockwise (the side without the tensioner) and the teeth might be off a hair but as long as it doesnt get any worse u should be good. I think my car got a bit more power because my timing was advanced a hair by doing my timing belt.
Red_Rocket is offline   Reply With Quote
Old 06-25-2009, 01:29 AM   #10
echo
e30 slave
 
Join Date: Apr 2009
Location: Bay of Islands, New Zealand
Posts: 74
Do more or less what all of the above people say.

In summary:

1/ There are 2 belts - a 126-tooth, and a 127-tooth. I'm pretty sure you can't buy the 126 anymore.

2/ It's good practive to change the tensioner for a new one when you do the belt. The new tensioner should have 127 stamped into it, and is the correct tensioner for the 127-tooth belt.

3/ Line the marks up with the belt off, but don't turn either the crank or the cam more than necessary to line them up - otherwise you can be a full turn out which would be catastrophic.

4/ As stated, tuck the belt under neath the crank first, and get it sitting on the teeth, then holding it in place pull it up and over the cam gear at the correct tension. it sounds as though at the moment you are at least a tooth out. then with the tensioner pushed back as far as it goes (ie loosened) and it's lock nut tightened to hold it there, thread the belt past the tensioner.
Everything should now be in place.

5/ Now loosen the lock nut on the tensioner and let it spring into place on its own. Rotate the crank by hand through two full revolutions and check the timeing marks. They should be exact. If you are a tooth out your can will run like a sack of shit. More than a tooth or two can cause damage from the valves hitting the pistons so DO NOT LEAVE IT LIKE THIS!

6/ now the belt is correctly fitted and the marks line up, tighten the lock nut on the tensioner. Do not push the tensioner in further - it is self adjusting. You should not manually set the tension. Tighten the pivot bolt on the tensioner.

7/ double check the timing marks are lined up and reassemble the distributor and covers etc.

Done.
__________________
echo is offline   Reply With Quote
Old 06-30-2009, 07:22 PM   #11
davericher20
black and blue
 
davericher20's Avatar
 
Join Date: Dec 2006
Location: 2 storey 3 bedroom 1 car garage
Posts: 3,585
k, went on e30tech and I followed a dudes advice word for word and it worked.
move the crank pulley 1/4" before the mark, set the belt on the cam, move the crank back to the line, and that did it.

except when I went to turn it (I wanted to do a couple cycles just for fun) it gave me a little resistance about 2-3 inches into the turn............I'm paranoid now, all the lines match up and everything but.........paranoia.

should I just crank it? or be worried?
__________________


Quote:
Originally Posted by JINT View Post
Some people have serious track experience from the cruise, so what is fast to you, isn't fast to them.
davericher20 is offline   Reply With Quote
Old 06-30-2009, 07:32 PM   #12
supernaught
6th Gear Member
 
supernaught's Avatar
 
Join Date: Aug 2006
Location: Peterborough
Posts: 1,318
Send a message via MSN to supernaught
it will be tight in some spots as the cam pushes on different combinations of valves. But make sure you turn it by hand. Do not use the starter until you know everything is clear.
Also, if you want to make it easier to turn, pull out the spark plugs, then you won't be fighting compression. Thats probably all it is.
__________________

88 325IX TOURING DiamantSchwarz|89 325IX AlpinWeiss|88 325IX DiamantSchwarz
supernaught is offline   Reply With Quote
Old 06-30-2009, 07:35 PM   #13
davericher20
black and blue
 
davericher20's Avatar
 
Join Date: Dec 2006
Location: 2 storey 3 bedroom 1 car garage
Posts: 3,585
spark plugs are out,

turn it by hand? that seems hard to do, I've been using the socket wrench the whole time........
__________________


Quote:
Originally Posted by JINT View Post
Some people have serious track experience from the cruise, so what is fast to you, isn't fast to them.
davericher20 is offline   Reply With Quote
Old 06-30-2009, 07:40 PM   #14
supernaught
6th Gear Member
 
supernaught's Avatar
 
Join Date: Aug 2006
Location: Peterborough
Posts: 1,318
Send a message via MSN to supernaught
haha, ya, well thats what i mean
rock it back CCW a bit, the CW again and try to feel if its hitting solid or just a bit tough.
__________________

88 325IX TOURING DiamantSchwarz|89 325IX AlpinWeiss|88 325IX DiamantSchwarz
supernaught is offline   Reply With Quote
Old 06-30-2009, 07:49 PM   #15
davericher20
black and blue
 
davericher20's Avatar
 
Join Date: Dec 2006
Location: 2 storey 3 bedroom 1 car garage
Posts: 3,585
If it is off would I have enough strength to bend valves if they were hitting?
__________________


Quote:
Originally Posted by JINT View Post
Some people have serious track experience from the cruise, so what is fast to you, isn't fast to them.
davericher20 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 01:40 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.