Question about 1987 Buick LeSabre

1 Answer

Timing chain installation

87 buick lasabre 3.8L need to find tdc.....#1 cyl at top....dot on bottom gear is at the bottom....

Posted by on

  • 3 more comments 
  • jmichgunn May 21, 2009

    doesn't it have to be top dead center on #1 cyl for dots to line up?

  • jmichgunn May 21, 2009

    doesn't it have to be top dead center on #1 cyl for dots to line up?

  • jmichgunn May 21, 2009

    I have turned the crank several times, checking position of piston...cannot seem to get piston TDC & dot on top...as long as piston is TDC, on #1, can't dot on bottom gear...be on bottom, and top gear dot (bottom position) be lined up vertically? This is tuff!

  • jmichgunn May 21, 2009

    I think you might have solved this! Is that a confirmation that the #1 piston is 1st one on right, facing front of motor? If so, I was told it was 1st one on left....and this could be the whole trouble....If this is it....I will be happy to leave you AWSOME feedback!

  • jmichgunn May 21, 2009

    I appreciate your help.

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 81 Answers

You need to rotate your crankshaft 360 and bring the dot to the top so it corresponds with the dot on the camshaft, once youve got the two dots together you should be good to go.
hope this helps
good luck and please leave your feedback it you would please.
thanks

Posted on May 21, 2009

  • 3 more comments 
  • Keith Petersen May 21, 2009

    yes it does, but the crankshaft has to turn 720 degrees for a complete cycle, so with the #1 piston at TDC could be the beginning of the intake cycle or the begining of the exhaust cycle.

    so if you #1 piston is ATDC and the dot is at the bottom then you are on the beginning of the exhaust cycle, rotate the crankshaft 360 degrees will put the piston to the top and the dot to the top.

    I hope this helps,

  • Keith Petersen May 21, 2009

    i just looked up the timing setting for the camshaft in my chiltons manual, and it doesnt say anything about having the piston atdc, you just need to get the dots adjacent to each other,

    cranshaft dot to the top, camshaft dot to the bottom so they are facing each other, that is the correct timing for the camshaft.

    good luck,

  • Keith Petersen May 21, 2009

    you know before you put this all back together let me double check on this, but i think thats right, but hang on and ill get right back to you.

  • Keith Petersen May 21, 2009

    ok, i thought that the #1 piston would be ATDC with the timing marks aligned, the #1 piston is on drivers side closest to the radiator, so i assume this is the one your calling the #1 piston.

    anyway the manuel says to match the dots up, the dots should be looking at each other, if the number one piston is not atdc dont worry about it, just get the cam in timing w/ the crankshaft and youll be fine.

    let me know how it runs when you get done.

    i hope this solves your problem,

    would appreciate your feedback

    thanks

  • Keith Petersen May 21, 2009

    yes the #1 piston is on the drivers side closest to the radiator

    have fun my freind.

    thanks for letting me serve you.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to remove the timeing chian


22R 4 cyl.Get # 1 piston to TDC(stick the harmonic balancer back on temporary)setting the mark to O on the timing tab,pull the balancer back off and slip the chain on the crank gear after finding the single dot on the chain.Set the mark on the cam gear at very top and put the chain mark on that mark on the cam gear.Stick the cam gear back on the cam and bolt it back on.Your set now.

Apr 11, 2014 | Toyota Hilux Cars & Trucks

1 Answer

Timing guides collapsed dropped timing chains.


if you have the v6 with the 4.0 OHV set the #1 piston to top dead center and then when looking at the gears where your timing chain goes look for a dot on your engion near the small gear and align the dot with the dot on the small gear. you will have to put the chain around both the top and bottom gears at the same time you might need to turn the piston a little past top dead center when doing this to get the little gear to sit in place with the slot on the back side of the gear. ( i just rebuilt my engion )

Jul 08, 2011 | 1997 Ford Explorer AWD

2 Answers

Timing alignment for 2200


put it on tdc
and go from there
tdc top dead center

May 09, 2010 | 2001 Chevrolet Cavalier

1 Answer

Timing chain is on engine,is #1 cyl. at tdc?


it could be a hafe round of timeing the timeing marks are cam gear dot down crank gear dot up

Mar 02, 2010 | 1965 Chevrolet Corvette

1 Answer

HOW TO INSTALL TIMING GEARS AND CHAIN ON AN 82 BUICK REGAL


dot to dot on the gears #1 must be top dead center

Dec 16, 2009 | 1983 Buick Regal

1 Answer

I am working on a 1990 dodge ramcharger,5.9l engine w/air cond. Need to know where the #1 cyl fires.There's no under the hood stickers, or vavle cover decals.Had to replace timimg chain and gears and don't...


DONT MESS WITH THE DISTRIBUTOR, JUST REPLACE GEARS AND TIMING CHAIN ALINE BOTH CRANK AND CAM GEARS DOT TO DOT CRANK GEAR DOT UP AND CAM GEAR DOT DOWN.

Nov 04, 2009 | 1990 Dodge Ramcharger

2 Answers

I changed my timing chain and gears and i cant get my timing set for nothing can you tell me why or point me in the right direction


Verify that the distributor rotor is pointing directly at the #1 cylinder spark plug wire tower on the distributor cap, with engine set to TDC on the compression stroke for the #1 cylinder.
If not, and you have not touched the distributor previously, you have not set up the valve timing properly. Recheck your timing gear and chain alignment marks.
Hope any of this helps you. Good Luck!
If you need a diagram of the timing chain and gears, email me a request at partyguard@gmail.com

Oct 22, 2009 | 1988 Chevrolet K1500

2 Answers

Need cam timing specs 22r toyota truck


there will be two highlighted or dotted chain links for the camshaft and one for the crankshaft gear, position cam dot/TDC indicator in the 12-O clock position, the two dotted links should be on ether side of cam dot, turn crank dot to the 6-O clock position and line up highlighted link with dot on crank gear, if timing cover is on, then make sure cylinder 1 is at TDC when the two links are at 12-O clock.

Apr 08, 2009 | 1983 Toyota Pickup

3 Answers

1977 460 easiest way to check if timing chain is broken?


Hello awb420,

Unfortunetaly, you'll need to remove the cover to do this. There is no other way to check it.

1. Remove the radiator fan and cover; alternator and belt; (it should not be necessary to remove the other belt, or harmonic balancer on this engine, however if it looks as such, then remove.
2. Once you have those off, remove the water pump (unless the water pump bolts go into the block itself, you may not need to remove the water pump; however, in the event you have purchased a "timing chain kit" the water pump gasket(s) may be included; if so, go ahead and remove and use the new gaskets.
3. Remove the timing chain cover. Before you take out the timing chain and gears, (even though the timing may be off, mark the chain and gears as they sit (this is for safe measure; in the event the timing was not miraculously affected)
4. Take the old chain and gears off. Pull the number one plug out, and using a screwdriver, insert into the plug socket - using a socket and ratchet on the harmonic balaner bolt - clock wise, rotate the engine until you feel the #1 piston (screwdriver come up all the to TDC. (top dead center) You will know if you went to far, as pressure will releave off the screwdriver.Pull the screwdriver out, and back the engine up ever so slightly (keep screwdriver in just enough so you'll feel the piston return to TDC. This has just set your timing to where is should be. Later, with a timing light, you can fine tune it.
5. Take the new Chain, and gears, and put them together as such:

A. Top gear will have a dot. With the gear in the chain, rotate the gear until the dot is on the bottom, pointing straight . The small gear, will have a dot, or a notch. Locate it, and do the same, except make this dot or notch face straight up toward the dot on the top gear. These two dots should face eachother straight up and down.
B. Carefully, bring the chain and gears level, and insert into place on the block. (make sure area is free and clean completely of any debris, dirt, or any dust that may have settled. Once in place, making sure the dots are straight up and down.
C. Make sure the old gasket is clean from the block and the timing chain cover. When using a straight blade to clean, careful not to gouge the cover or block as this can cause potential leaks.
D. Apply gasket sealer to the gasket and the cover. Place gasket onto cover (or you can do this on the block) - let set for about 10-20 minutes. If the truck acts like it wants to start, but has trouble, loosen the distributor cap (if installed) and rotate it in either direction, until truck starts. Once it starts, try to put the distrubutor as close to it's original posotion as possible, or to a posotion that the truck remains running. With a timing light, point it down at the harmonic balancer and look for two timeing marks. (they should be white - sometimes blue) - when these two lines are aligned, and remain aligned, readjust the distributor again if needed. You're truck should idle smoothly between 800-900 RPM's at idle.

I highly suggest purchasing a service manual for this process as well. This will have more detailed instructions for the process, as well as give you a certified reference to go by. I suggest getting a CHILTONS. They are very discriptive and, if needed, pictures are usually better and more detailed as well; as well as any iillustrations.

I hope this information is useful and helps you get your truck running. I used the process for whichI go my 87 Buick running (top gear on timing chain was completely stripped) I followed the directions (from the service manual) and my car ran again. (note: if your truck has a coil pack, then on the top gear, there may be a magnetic component bolted to it - It is imperative that you put this piece on the new top gear - or the truck will not start - trust me....)

Thank you for choosing fixya.com,

Let me know if I can be of further assistance,

carsandcomps,
Guru, fixya.com
Oregon

Apr 07, 2009 | 1998 Ford Escort

1 Answer

Timing chain replacement


there will be two highlighted or dotted chain links for the camshaft and one for the crankshaft gear, position cam dot/TDC indicator in the 12-O clock position, the two dotted links should be on ether side of cam dot, turn crank dot to the 6-O clock position and line up highlighted link with dot on crank gear, if timing cover is on, then make sure cylinder 1 is at TDC when the two links are at 12-O clock.

Jun 12, 2008 | 1983 Toyota Cressida

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

146 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...