How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask sprinkles08 Your Own Question

sprinkles08
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 16871
Experience:  ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
9825021
Type Your Car Question Here...
sprinkles08 is online now
A new question is answered every 9 seconds

Cadillac Eldorado: Cam timing a northstar

Resolved Question:

Cam timing a northstar
Submitted: 1 year ago.
Category: Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

 

To set cam timing you start by rotating the crank until the key is at about the 1:00 position.

 

The crank sprocket is installed with it's mark at 12:00 and the intermediate gear's mark should be at 6:00, the marks on these two gears should line up. Install the gears and chains into the engine. Rotate the engine if necessary to install the sprockets yet keep the marks lined up. It is recommended to lock the crankshaft in place at this point.

 

Loosely install the left timing chain. It goes to the inner sprocket on the intermediate gear, run the chain up to the cams.

 

Route the chain around the left exhaust cam sprocket first with the sprocket removed from the cam. Have the sprocket so it's dowel pin hole is pointing near perpendicular to the valve cover sealing surface. Install the chain on the sprocket and turn it counterclockwise, making sure there is no slack in the chain between the crank and this sprocket. If your dowel pin hole isn't pointing at the 12:00 position in relation to the valve cover sealing surface when the slack is gone then move the chain on the sprocket accordingly.

 

Then route the chain over the left intake cam sprocket, making sure the dowel pin hole is again perpendicular to the valve cover surface and no slack is between each cam sprocket.

 

Then you can slide the sprockets on the front of the cams and start the sprocket bolts.

 

There is a hex on each cam where you can use a wrench to turn the cams one at a time to line up the dowel pins with their holes in the sprockets and slide the sprockets in place.

 

Then you can install the chain tensioner.

 

Go to the right side of the engine and perform basically the same steps, except this time you'll be starting with the intake cam instead of the exhaust cam.

 

Once you have all chains and tensioners in place double check all of your marks. The crank should be at 12:00 and intermediate mark at 6:00 and the marks should be lined up. All cam sprocket dowel pins should be pointing up, 90 degrees from the valve cover sealing surface. When the slack is out of the chains and you're happy with the installation then tighten the cam sprocket bolts.

 

Turn the crank two full revolutions and line up the crank marks again and double check the cam marks.

 

 

 

 

 

Customer: replied 1 year ago.

I cant find an answer to this anywhere,but all I need to know is this: there are 4 cam sprockets 2 say re ri and 2 say li le , the right exhaust cam sprocket has a timing pickup of somekind for the ecm . each gear has a slot for the exhaust or the intake ( ie: RE RI ) I dont think it maters as long as the cam pin is at 90*which slot you put the gear on EXCEPT for the Right Exhaust cam(the one which the magnet pin in it ) or does it matter? does the ecm need the know where the cam is or does it only read the speed of the cam? So to sum it up when you have the crank dot at 12 oclock,the intermediate gear dot at 6 oclock and all cam pins at 90* to the head surface, the RE dot At 90* on the rt exhaust cam RI dot on the right intake cam at 90* and so forth, Sorry if I didnt explain it correctly, thank you in advance.

Expert:  sprinkles08 replied 1 year ago.
You're correct - with the crank dot at 12, intermediate at 6, the cam marks should all be 90 degrees.

The RE sprocket is right exhaust, RI is right intake. LE is left exhaust, LI is left intake. The one that does have to be in the correct position no matter what is the right exhaust where the cam sensor reads. If this one isn't in the correct position then the engine won't start. The engine controller reads cam speed and it's exact position for spark and fuel control.
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 16871
Experience: ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
sprinkles08 and 12 other Car Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician