Question about 1993 Nissan Sentra 4 Door

1 Answer

Cam timing with no colored links on chain!!

I just got through replacing the head gasket on a qg18de motor on a 03 sentra, i rotated the crank to tdc ( red line on the harmonic balancer) but im havin trouble with the cam gear ttiming. my chain only has one blue link which is for the crank im guessing due to the fact that no colored link is visable and it is at tdc now. ive already torqued the head bolts and only have to time the cams up. where do i start as far as timing the cams up? cam settings???

Posted by on

  • George DeMore
    George DeMore May 11, 2010

    I don't see qg18de motor for that year of Sentra,There is a GA16DE with a double overhead cam,is your motor a double overhead cam with an upper and lower chain?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert that hasĀ over 500 points.


    Visited the website for 3 consecutive days.

  • Expert
  • 175 Answers

Buy a new chain to make things easier

Posted on Jun 02, 2009


1 Suggested Answer

  • 2 Answers

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

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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

I'm replacing the head gasket on a 95 Nissan altmia 2.4, do I need to put the engine at TDC before removing the cams and chain?

its a good idea to set the engine at TDC before disassembly. note the location of timing marks on crank and cams to familiarize your self when you go to re-install.

Aug 06, 2015 | Nissan Cars & Trucks

1 Answer

I've had the left rear head rebuilt on a 03 Nissan maxima 3.5 liter, but did not set the number one piston at top dead center prior to the installation of the new head gasket and rebuilt the...

Yes, you could of damaged a valve by rotating then engine or the cam. Now this only applies if it's a non clearance engine.. now what you might have done is rotated the cam out of timing while doing whatever it is you were trying to do. SO you might have to dis-assemble the timing chain/gears to try and reset everything

Nov 02, 2014 | Cars & Trucks

1 Answer

Instruction changing timing belt 1979 Alfa Romeo Spider Veloz?

With Cam Caps loosened, FIRST loosen timing chain tensioner, press it in to loosen tension, Crank using ratchet to TDC (Top Dead Center on crank pully, (to keep from damage to pistons), align Exhaust Cam Timing Mark to mark on #1 Exhaust cam cover, then take up slack between Exhaust & Intake Cams (on top between the cams), Then align the Intake Cam to mark on #1 Cam Cap, "Now" loosen the 17mm bolt to tighten timing chain, rotate engine using rachet two times, reset TDC at the crank, and look at "Cam Timing Marks on both the Exhaust, and Intake Cams. If you did all this correctly the "Timing Marks" should be lined up so TDC,Exhaust, and Intake marks are all the same.

Oct 10, 2014 | 1979 Alfa Romeo

1 Answer

I need a picture of the timing marks for Jeep 4.0

Timing the Cam to the Crank

There are several ways to time the cam to the crank. Be sure to check the manual before you install the timing chain or belt.

  • Some timing sprockets are properly timed when the marks face each other.
  • On others, there must be a certain number of chain links between the marks.
  • Sometimes chains have colored links that must be aligned with the marks on the sprockets.
  • Some overhead cams have a mark on the cam gear that lines up with a mark on the cylinder head when the timing mark on the damper is at the TDC mark.
Align the timing marks for the camshaft and crankshaft sprockets before removing the timing belt or chain.

If the old parts are available, carefully compare the new gears or sprockets with the old ones. Check the keyway and timing marks just in case there might have been an error made in manufacturing. Sprockets are sometimes stamped backward. Its much better to find the problem during assembly, rather than waiting until problems show up after reassembly and reinstallation.

Maintaining Valve Timing

During a valve job, it is essential to keep the timing chain or belt in place to maintain correct valve timing. Position the number one cylinder at TDC. Some overhead cam engines use a single long chain for a cam drive. The chain can be wedged against its guides with a tapered block of wood.
the chain tensioner on some ohc engines must be wedged to keep the chain in position during cylinder head removal. courtesy of nissan motors.

Some engines have a lower and upper chain. These engines do not require special attention to wedging the chain. Be sure to look for hidden head bolts and check the repair manual before removing the OHC head.

Dec 07, 2012 | 1989 Jeep Cherokee

1 Answer

No compreesion on 2000 gmc 4.3l

You need to check the mechanical timing of the cam and the crank. it appears that they are not correct. The valves are open when the pistons are compressing.

Dec 01, 2012 | 2000 GMC Jimmy

1 Answer

How do i set the valve timing if i cant see the timing marks on a VW 1.8 20valve golf cylinder head timing chain , i can only find the one on the belt side i have put the cam on TDC for the ex-valve but...

The 2 cams are linked with a chain at the rear of the cylinder head.

The cams need to be set so the slots on the chain sprockets line up with the cam tower caps with 16 links between cam caps.

You cannot see the front crank pulley tdc mark so you need to lock the engine at tdc with a screwdriver jammed into the timing hole on the bell housing after setting engine at tdc or use a DTI
to check to tdc in the #1 spark plug hole.

If the cams have not been disturbed you only need to set the belt cam sprocket to the mark and crank to tdc.....all this means pulling the core support into the service position so the belt tensioner can be locked down and/or doing a complete belt job along with a coolant pump if over 70,000 miles..

Aug 20, 2011 | Volkswagen Golf Cars & Trucks

1 Answer

How can i remove and install a blown head gasket the right way, from a nissan sentra 1.8 (QG18DE)? please help.

You should get a service (shop) manual which describes this procedure. (You may be able to borrow one from your local public library, but I think they are worth buying).
If this is an overhead cam (cam-in-head) engine, you will need to turn the engine until the timing marks on the cam and crank line up, so that you can put it back together correctly.
You will also need the head bolt tightening (torque) sequence, the bolts have to be tightened in a certain order to the correct torque value.
You might want to replace the water pump at the same time, as you will be taking off everything (and more) that you would have to take off to replace it, and unless you have done that recently, it is about due anyway.
This is MAJOR engine work, unless you have done a fair bit of repairs before, you might not want to attempt this yourself.

Sep 05, 2010 | Nissan Sentra Cars & Trucks

1 Answer

Have a 2006 cobalt 2.2 liter DOHC eco tech w bad head gasket and warped head. just got the head machined and replaced the head gasket along with many other parts. but im trying to install the timing chain...

when you got the chain on and the cam's timed and unloaded and locked the tensioner and installed the tensioner then the shoe guides did you unlock the tensioner before you turned it over
when you turn the engine over it will have a little bit of slack because it's only spring tension
double check the engine is timed correct don't worry about the colored links they only line up every 35 revolutions
if the crank and the cams are in time
you should be good
hope this helps

Nov 08, 2009 | 2006 Chevrolet Cobalt

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

Not finding what you are looking for?
1993 Nissan Sentra 4 Door Logo

378 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts


Level 3 Expert

76630 Answers

Phil Lovisek
Phil Lovisek

Level 3 Expert

726 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

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

Answer questions

Manuals & User Guides