How to set v6 @ TDC with timming belt off? - YotaTech Forums

Go Back  YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Reload this Page >

How to set v6 @ TDC with timming belt off?

Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

How to set v6 @ TDC with timming belt off?

Reply

Old 12-29-2005, 05:35 PM
  #1  
Registered User
Thread Starter
 
FireMan's Avatar
 
Join Date: Jul 2003
Location: San Diego
Posts: 103
How to set v6 @ TDC with timming belt off?

Just for the hell of it, how would one go at getting the cams and crank lined up at TDC with out a timming belt being on previously?

Just wondering.
FireMan is offline  
Reply With Quote
Old 12-29-2005, 06:08 PM
  #2  
tc
Contributing Member
 
tc's Avatar
 
Join Date: Nov 2005
Location: Longmont, CO
Posts: 8,875
I think you would pull the #1 plug and watch for the cylinder to come to TDC, then align the marks on the cam pulleys with the marks on the head.

Would it matter if you lined it up after the compression or the exhaust stroke?
tc is offline  
Reply With Quote
Old 12-29-2005, 06:26 PM
  #3  
Contributing Member
 
marko3xl3's Avatar
 
Join Date: Jun 2005
Location: San Jose, CA
Posts: 1,725
Originally Posted by tc
Would it matter if you lined it up after the compression or the exhaust stroke?
From my noob knowledge of mechanics, I am going to say that it doesn't matter, because you should be putting your cams at 0 and the cylinder at TDC. Someone correct me
marko3xl3 is offline  
Reply With Quote
Old 12-29-2005, 06:50 PM
  #4  
Contributing Member
 
NCSU-4runner's Avatar
 
Join Date: Apr 2003
Location: Raleigh NC
Posts: 1,579
the cam pulleys should only go on in one position and be marked for TDC, or at least they have been on the motors ive worked on, for the crank just put a socket extension in and turn it till it reaches the highest level
NCSU-4runner is offline  
Reply With Quote
Old 12-29-2005, 06:52 PM
  #5  
Registered User
 
ChickenLover's Avatar
 
Join Date: Apr 2004
Location: NV
Posts: 2,583
Originally Posted by tc
Would it matter if you lined it up after the compression or the exhaust stroke?
Hmmm, if there is no timing belt, the distributor isn't rotating, so it probably wouldn't matter. Just make sure you set the dist so the rotor is pointing to #1 on compression stroke afterward.

So to answer the first question, I would:

-Rotate the crank until the mark on the pulley lines up with 0 degrees on it's counter part.

-Take a peek at the rotor, make sure it's pointing at #1 - or (if your distributor is removed) remove #1 spark plug, stick your finger in the hole, rotate crank to 0 degrees, if you feel a blast of air go past your finger you are on TDC of the compression stroke(good), if you feel no blast you are on the exhuast stroke (rotate once more). make sure crank is at 0 before moving on.

-Line up each cam.

- replace distributor with rotor pointing at #1 spark wire. (if needed)

Last edited by ChickenLover; 12-29-2005 at 06:54 PM.
ChickenLover is offline  
Reply With Quote
Old 12-29-2005, 07:57 PM
  #6  
Registered User
 
Manson's Avatar
 
Join Date: Aug 2005
Location: Kalispell, Montana
Posts: 19
Both cam sprockets have timing marks on them that corrispond to a mark on the plate behind the sprockets. The marks point up. If the lower timing belt cover is on then line up the notch on the crank pulley to 0 on the cover. If the lower cover is off there is a mark on the lower timing belt pulley that lines up with a mark in the oil pump housing. If all these marks are lined up you can't screw anything up with the timing.
Manson is offline  
Reply With Quote
Old 12-29-2005, 08:11 PM
  #7  
Registered User
iTrader: (1)
 
Join Date: Nov 2005
Location: Peoria, AZ
Posts: 17
I will back up Manson's statement. I had my second timing belt come apart while traveling 75 on the freeway. After I got it home and cleaned up, lined up the arrows and put the new timing belt on. All has been good ever since.
AZrocktoy is offline  
Reply With Quote
Old 01-02-2006, 05:23 PM
  #8  
Registered User
Thread Starter
 
FireMan's Avatar
 
Join Date: Jul 2003
Location: San Diego
Posts: 103
Interesting. I forgot about the marks on the cam pulleys and the 3rd cover. Wouldn't you have to be a bit carefull on rotating the crankshaft since the 3.0 is an interference engine?
FireMan is offline  
Reply With Quote
Old 01-02-2006, 05:26 PM
  #9  
Contributing Member
 
colsoncj's Avatar
 
Join Date: Jun 2004
Location: Monett, MO (Springfield)
Posts: 2,644
im almost positive the 3.0 isnt an interference engine.... so nope, no worries
colsoncj is offline  
Reply With Quote
Old 05-10-2010, 07:32 PM
  #10  
Registered User
 
9four4runner's Avatar
 
Join Date: May 2009
Location: eureka ca humboldt
Posts: 118
no i dont think so,
i just rebuilt my 3vze and lined up the bottem pully, both cams are lined up and i put everything back together and now it wont start ?
how can i tell if im either 180* out or on the exhaust stroke?
9four4runner is offline  
Reply With Quote
Old 05-10-2010, 08:32 PM
  #11  
RMA
Contributing Member
 
RMA's Avatar
 
Join Date: Dec 2008
Location: San Jose ,Ca
Posts: 2,505
Originally Posted by 9four4runner View Post
no i dont think so,
i just rebuilt my 3vze and lined up the bottem pully, both cams are lined up and i put everything back together and now it wont start ?
how can i tell if im either 180* out or on the exhaust stroke?

this one looks pretty good ..


Originally Posted by ChickenLover View Post
Hmmm, if there is no timing belt, the distributor isn't rotating, so it probably wouldn't matter. Just make sure you set the dist so the rotor is pointing to #1 on compression stroke afterward.

So to answer the first question, I would:

-Rotate the crank until the mark on the pulley lines up with 0 degrees on it's counter part.

-Take a peek at the rotor, make sure it's pointing at #1 - or (if your distributor is removed) remove #1 spark plug, stick your finger in the hole, rotate crank to 0 degrees, if you feel a blast of air go past your finger you are on TDC of the compression stroke(good), if you feel no blast you are on the exhuast stroke (rotate once more). make sure crank is at 0 before moving on.

-Line up each cam.

- replace distributor with rotor pointing at #1 spark wire. (if needed)
RMA is offline  
Reply With Quote
Old 05-11-2010, 11:01 AM
  #12  
Registered User
 
bugs1961's Avatar
 
Join Date: Jul 2006
Location: Anchorage
Posts: 479
If you line up the crank pulley and cam pulleys with their marks, you are by definition at TDC of the compression stroke. There is no possible way (unless something is broken bad) for any other option. With all the pulleys correctly lined up, follow the FSM procedure for installing the distributor and you will be set.

The 3.0 is not an interference engine so no worries on damage when rotating the crank or cam.

Take care
bugs1961 is offline  
Reply With Quote
Old 05-11-2010, 08:26 PM
  #13  
Registered User
 
9four4runner's Avatar
 
Join Date: May 2009
Location: eureka ca humboldt
Posts: 118
ok so i tore it down reset the crank to 0 and the top gears alinged and restabed the dis. but she wont start?
i dont get it shell turn over i get spark and gas but no start
9four4runner is offline  
Reply With Quote
Old 05-11-2010, 09:44 PM
  #14  
Registered User
 
Lex.Luther's Avatar
 
Join Date: May 2010
Location: Huntsville, AL
Posts: 38
Silly, Wild-Ass Guess, but are you sure you are not 180 degrees off on your timing? As you know, the crankshaft turns twice for each time the camshafts turn once. So, when the crankshaft pulley's mark is lined up with the corresponding line on the motor (or oil pump I think it might be,) you only have a 50/50 chance of the No. 1 cylinder being at the top of its compression stroke...which is where it must be.

RMA provides a prior post above by ChickenLover wherein he provides the 'Betty Crocker' on how to ensure this is indeed the situation. If you followed that recipe, the crankshaft is in time with the cams...if not, it could be 180 degrees off. Aplogolies if I am covering old ground.
Lex.Luther is offline  
Reply With Quote
Old 05-12-2010, 06:35 AM
  #15  
Registered User
 
9four4runner's Avatar
 
Join Date: May 2009
Location: eureka ca humboldt
Posts: 118
thanks Lex ill double check it right now ill retear her down again
9four4runner is offline  
Reply With Quote
Old 07-13-2018, 09:27 AM
  #16  
Registered User
 
Join Date: Jun 2018
Posts: 7
Tdc

What was the final result of your engine not starting, was it 180 d out
GaryLDuncan is offline  
Reply With Quote
Old 07-13-2018, 06:47 PM
  #17  
Registered User
 
wallytoo's Avatar
 
Join Date: May 2013
Location: nh
Posts: 699
Originally Posted by GaryLDuncan View Post
What was the final result of your engine not starting, was it 180 d out
you really, really, REALLY need to look at post dates before asking questions directed to a specific user. the most recent post prior to yours occurred 8 years ago, and the thread began THIRTEEN years ago.
wallytoo is offline  
Reply With Quote
Old 07-14-2018, 02:04 AM
  #18  
Registered User
 
Join Date: Jun 2018
Posts: 7
Tdc

Your right ,BUTTTTTTTTTTTTTTTTTTTTTTTT,I did observe that the person who posted the remarks was still around as recent as may 2018. So do you know if he figured out what the problem with his engine was.!
GaryLDuncan is offline  
Reply With Quote
Old 07-14-2018, 02:25 AM
  #19  
Fossilized
Staff
iTrader: (6)
 
dropzone's Avatar
 
Join Date: Oct 2005
Location: PNW
Posts: 18,794
Originally Posted by GaryLDuncan View Post
Your right ,BUTTTTTTTTTTTTTTTTTTTTTTTT,I did observe that the person who posted the remarks was still around as recent as may 2018. So do you know if he figured out what the problem with his engine was.!
send the member a pm...
dropzone is offline  
Reply With Quote
Old 07-14-2018, 02:59 AM
  #20  
Registered User
 
wallytoo's Avatar
 
Join Date: May 2013
Location: nh
Posts: 699
Originally Posted by GaryLDuncan View Post
Your right ,BUTTTTTTTTTTTTTTTTTTTTTTTT,I did observe that the person who posted the remarks was still around as recent as may 2018. So do you know if he figured out what the problem with his engine was.!
i count at least 10 different individuals who posted remarks. yours quotes zero of them. as dropzone stated, send the particular user a PM.
wallytoo is offline  
Reply With Quote
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
justdifferentials
Just Differentials
3
09-29-2015 05:30 PM
voiddweller
86-95 Trucks & 4Runners
16
09-28-2015 11:21 PM
PBRaddict#1
Newbie Tech Section
3
09-22-2015 07:50 AM
sonorn67
84-85 Trucks & 4Runners
3
09-19-2015 05:39 PM
Longbed 90
86-95 Trucks & 4Runners
21
09-15-2015 09:40 AM


Thread Tools
Search this Thread
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: