Question about 1995 Chevrolet Lumina

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3.1 v6 when replacing the timing chain I turned the cam into position but the crank comes to a dead stop. Is this an interferance engine and if so do I have to turn the cam to a certain position to turn the crank?

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Rotate the cam on position and move the crank where it needs to be and rotate the cam back where it should be. This way you're getting the valve out of the way so you can get the piston where it needs to be.

Posted on Jul 03, 2008

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Posted on Jan 02, 2017

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3 Answers

It seems to me that if the belt breaks , even on an interference engine: the valves will slam shut . Maybe it 50/50 chance either way.


belt has to be replaced any way
compression test on the cylinders.. tells you straight away
zero or low compression numbers ..valves bent

in an interference engine OHC or DOHC belt breaks
the cams stop dead and pistons continue to move up and down

non interference there is a gap between pistons and valves

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Oct 31, 2016 | Cars & Trucks

1 Answer

Just anted to confirm that my 2005 buick rendezvous has a non interference engine as i need to replace the timing belt/chain and was concerned with driving it


you need to say what engine it has ( 4,v6,v8)
a qualified mechanic always treats an engine as intereference fit regardless because either engine can have valve damage when the failure occurs
If you have not broken a belt or chain and you set the timing marks up properly before removing the belt or chain and do not turn crank or cam/s after the belt/chain is removed there will be no damage done
that only occurs when the crank is or cam/s are turned without the connection to each other

Jul 01, 2016 | 2005 Buick Rendezvous

2 Answers

Passing smog


I doubt it as you have stated that it shows a calibration fault . This will be from the variable valve timing assembly on the cam shaft/s that is altering the valve timing. The timing chain may be faulty but you should be hearing it to be that bad.

Apr 03, 2014 | Volkswagen Jetta Cars & Trucks

1 Answer

Can some one show me timeing mark on 1997 nissan maxima please


wow a Nissan Camry.
what engine, ??????????
what are you doing, we dont know. so..
cam marks? chain marks?
spark timing?

in 1997, most cars have 6 or more marks.

Nissan V6? is it (guessing i am)
if doing major cam work , you will need far more that just mark data.

if doing serious work, i recommend the below
  1. a real FSM, from NISSAN if Nissan.
  2. alldata.com
warning:1
all nissan engines are All Interference
so doing cam work or finding engine dead,
do a leak down test by hand before cranking engine
or bend the valves.
after replacing chain, do a cyl. leak down test (a tool)
and if it fails, the valves were bent, do not crank engine
or the damage WILL cascade $$$$$$$$$$$$$$

Feb 22, 2014 | 2006 Toyota Camry

1 Answer

Turns over but no spark, after new head askets


are you asking this 3 times removed? really>????
is this the 4 cam v6 or 2?
the 4 cam has 2 gears for 2cams and belt drive. 6ve1
the 2 cam v6 has no gears.
6ve1 engine, they have real names and all run different EFI controls
all do.

ok no spark (tested the wrong way !!!)
fuses good. or not, we test them not guess, on (looks ok)
you need to run compression on any engine with new head (or pulled) or leakdown 10x more safe.
that be first. you can bend valves on the 4 cam engine
(not on 2valve engines,one per bank)
forget the 2 CMP sensors on rear of both heads.?
spark dead on all 6 spark plugs
ckp dead.
CMP 1 or 2 dead
fuse blown.
has 6 ignition coils right, (usa) called C.O.P.'S.

i bet you didnt scan it cranking did you
if the pcm on the 6ve1 engine, sees cams turn wrong
it cuts spark to keep from bending over the head valves
the cams must be timed correctly and not in a cavalier manor
what's your engine vin code 8th digit
that tells the helper what engine is there, as you seem not to know.
there are 3 different V6 used here.

i see you really didnt check spark, just assumed it.
why? extend one cop, use fresh grounded test spark plug
omg got spark omg on all 6 in fact
omg compression is dead. x6 bent valves.

i never ever ever, crank any DOHC engine (messed with like this)
until the leak down test passes, by hand with shop air.
this act,saves further damage

VIN = Y or W
eight digit of vin is engine code. !!!
are 4 camsl

its flooding
so, compression is gone
sparks gone
or it over injecting for some reasons
if compression is ok, 150psi +
and parks good
secret wide open throttle will clear floods, (cut fuel mode )
but all this is risky on any 4 cam interference engine.

when i put the belt back (assuming cams not removed)
I check cam timing 2 time or 3 times, or risk bending valves.
6ve1
then do the leak down test now, just like you are there.
hand turned crank. (at each of the 6 TDC points(skills)
opps its got 0psi on many cylinder
that means valves are bent.

here is the SM quote step 4 belt install
WARNING If any binding is felt when adjusting the timing belt tension by turning the crankshaft, STOP turning the engine, because the pistons may be hitting the valves.
one can just throw an engine like that back together.
they also told you to set cam timing first, before pulling heads
or damage can happen,
but that depends on the event
belt snapped, jump cogs or just leaking head gasket.

Mar 02, 2017 | 2000 Isuzu Rodeo

1 Answer

1996 dodge ram 1500 v6 interference motor


the book says do not turn crank with cam chain disconnected-- so --yes ---it is an interference motor and if you turn either with out the cam you will bend valves.

Jan 02, 2014 | Cars & Trucks

1 Answer

I am rebuilding the 2.3 in an 2005 mazda tribute. How do I synchronize the crank with the cams ? There is no keyway on the balancer


If you have the cylinder head off it is easier to do but with the head on, put the balancer on and make a reference mark on it to the crank snout, then use a long bolt the exact size of the sparkplug threads, threading it into the #1 cylinder. Turn the engine slowly by hand 'till the bolt stops the piston.(be careful that the bolt does not interfere with valves) Make a reference mark on the outside of the pulley and a reference mark matching that position on the block. Turn the crank backwards till the bolt again stops rotation. Make another mark on the pulley in the same place the block mark is at. The halfway point between the two pulley marks is exact top dead center. You can then make another mark at the halfway point, remove the bolt and turn the new mark so it aligns with the block reference. At that time, the piston is at tdc and any mark you put on the pulley can be referenced with a corresponding mark you place on the block for permanent reference will always be tdc, probiding the first reference you made on the pulley and crankshaft are kept in alignment.
Once the crank has been indexed, you can set up cams, following timing chain replacement instructions in your manual. Once this has been completed, turn the engine four complete revolutions by hand and re-check your index points. There should be no valve interference or other binding, and all index points must align properly. What I've described is making a "poor mans" degree wheel. You can buy an actual degree wheel in most speed shops, and also information on using it, as well as performance setups that take advantage of changing the performance curve of your engine by changing crank/cam relationships. You may find some of that interesting and informative!!!

Aug 02, 2009 | 2005 Mazda Tribute

3 Answers

Installed new timing chain but car wont start


What the last person said with the additional comment that being even one tooth off can cause it to run bad or not start. I prefer making marks on the gears and chain or belt- whichever you have and transferring the marks by teeth counting to the new belt or chain- fool proof. Did you rotate either the camshaft or crankshaft with the timing chain removed? If your engine is not a zero interference engine than you may have damaged the internal parts. Even on some zero interference engines, you can damage the camshaft by rotating it backwards. Your timing is just plain off or you may have damaged the engine. Sorry, don't know if your is a zero interference or not- I think most are not. I know my Miata is and my Eclipse was not. If it is not a zero interference engine and your marks are way off on your timing- just go ahead and save up at least the money for a new head and send it to mechanic. If it is a zero, and your marks look on- see if the interpretation of the mark could possibly be 1 tooth over on either the cam or crank. Make you go blind staring at it that intently and u can make mistakes.

May 12, 2009 | Infiniti G35 Cars & Trucks

1 Answer

3.1 tming chain


There are alignment marks on the timing set,and before you remove the old timing set,you must get cylinder number 1 in the firing order to Top Dead Center....then you can remove the old,and reinstall the new,timing set,but pay careful attention to the marks on each gear,in relationship to each other and where they line up.The new timing gear and chain set should have directions on where they are to line up,if not,you need to buy a Chilton manual for your specific car,as i don't have the specific information for your 3.1 engine.It sounds like your timing is WAY off,and when rotating the crank,a piston is hitting a valve...that means it's WAY out of phase...do not start the engine until resolved.The camshaft actuates the valves in relation to the crank and pistons' position,and when the valves open or close is VERY important for the engine to run properly,this is what i'm talking about (phased in) correctly.

Jul 27, 2008 | 1995 Chevrolet Lumina

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