Question about 2003 Saturn VUE

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Piston hitting valve

I followed the procedure for installing the timing chain, however when I try to hand turn the engine a piston is hitting a valve? What is the procedure for fixing this?

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The procedure is ti fit the timing belt properly. Did you start the process with the engine at TopDeadCenter on the compression stroke of number 1 cylinder? Something is terribly wrong, congratulations on testing the configuration by hand. I've seen what damage has been done by people that just hooked up the battery and wind it over. They had a smashing good time.

Pull all your spark plugs, put your finger over the number 1 spark plug hole and wind the engine over by until you find the compression stroke on number 1 cylinder. Keep turning slowly until you bring you crank timing mark to the timing indicator. You should be at TDC compression number 1 cylinder, you can check with a screw driver or piece of wire that the piston is at the top. Make sure you are winding the engine in its working direction. Now look at your camshaft timing marks and indicators, they should all line up. If the marks are out of line, correct them, do not move the crank.

Once you have everything lined up again and tensioned correctly. Turn over the engine by hand 2 FULL revolutions. Should be all good then.

Posted on Mar 23, 2014

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alicantecoli
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SOURCE: I just installed a new timing chain on 02 saturn l100. followed all instructions. rotated engine so chain rolled five times and coloed links do not line up with marks on sprockets. am i doing somethin

No it will only alighn something like every 300 or so turns ,youre all ok

Posted on Oct 28, 2012

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2 Answers

Need to know where to set the timing chain on a 1.8 engine


old post but , j18 free data. is rare.
where to set, my guess you need the chain timing steps>?

the free page (here is all text)
http://fixkick.com/engine/18L/chainsteps-all1_opt_5.txt

here are the graphics (gee the new chain has instructions lost those?)
at autozoned
http://www.autozone.com/repairguides/Suzuki-Esteem-Swift-1994-02/Engine-Mechanical-Components/Timing-Chain-Sprockets/_/P-0996b43f8037a82a

btw, it is and interference engine, J18 is. and J20 up.
put on new chain
and hand turn engine, do a cylinder leak down test (a tool)
before cranking it up. 1st time. if it fails you have bent valves.
also turn it and feel for something hitting. as you turn. ooops.
do that on all DOHC engines. (rare exceptions ) and win.

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1 Answer

Does the 2007 Prius 1.5 L have an interference engine?


this yours? the real name? Great question, I dont know.
the NON X engine IS !

gasoline (1.5L, VIN B, 5th digit, 1NZFXE engine)

That X means:
making it a simulated Atkinson cycle, engine. not OTTO.

with a very unique cam timing and high compression. 13:1

the engine is cam chain driven.
so if you dont let the chain scream ,what's the worry.?

on many High CR engines, the piston chases the exhaust valves
closed very very close, so close the engine is interference.
i find nothing on the web to say if X , is or not.
also what about VVT.?
what if it failed, in the wrong spot, owner ignore DTCs
and the chain screaming. then what? (nobody knows, it seems)

id love to do the check by hand, but not many motors sitting about to do that.
the non X engines FSM warns that there are interference issues.
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wow.
http://www.mr2.com/files/mr2/techinfo/Random%20FSM%20Data/1nzfxe.pdf

Chain off, spark plugs out.
if the chain snaps
there is no VVT with no chain.
so the hand check method works
valves at max open. (watch the lifters)
now:
spin crank, no chain 360 degrees.
does it hit? felt by hand?, the non X does.
repeat for each side, intake exhaust.

i spin crank not cam to feel it, as cranks is smoother.
some engines btw are SO close they only hit hot and at high RPM.
a good spec, for this is 0.040" valve to piston clearance at all times.
at normal temps and presssures and RPM.




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I HAVE A 1998 EL FALCON. WE REPLACED HEAD AND FITTED NEW TIMING CHAIN AND GUIDES. BY FOLLOWING MANUAL WE HAVE SET VALVE TIMING MARKS. BUT VALVES ARE OPEN WHEN SHOULD BE CLOSED. HAVE EVEN HAD FORD EXPERT ...


the piston has to be on tdc
the valves have to be in the valve rock position
that is the exhaust is just starting to close at the same time as the inlet is just starting to open
the number of links should now be at the timing marks or the timing marks should line up when the crank is turned one full revolution

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1 Answer

Timing chain


bent push rods could have been caused when the chain broke and not from the chain been replaced wrong or the timing out.

if the engine was running when the chain broke the cam would have stopped leaving all the valves in the same positon as the mometum of the fly wheel continued to turn the pistons in the cylendars could hav come up and hitting the valves and bending the push rods. and or damaging the cylendar head.

recommend removing the head and have it checked for damage, as well as replacing the bent push rods, and cylendar gaskit. once the head is checked and the valves are seated well. then replace and follow instructions in the set up for the pistons and cam prior to replacing the chain and setting the timing.

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