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5.7 tbi replaced cam, lifters, timing chane now won't start

I have a 1994 Chevrolet Suburban. It had a flat lobe on the cam so I replaced the cam, lifters, timing chain. Now, I cannot get it to start. I know that the cam and crank timing gears are aligned correctly (both marked teeth aligned, and the timing line on the harmonic balencer on the 0). Adjusted the valves according to the book, but the truck will not start. Any lhelp would be very much appreciated. I also zeroed the computer.

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  • Cars & Trucks Master
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Check the crank position sensor and cam position and wires are connected
reset the ECM using a scan tool that has the protocols for GM

Posted on Jul 09, 2017


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Posted on Jan 02, 2017


SOURCE: 2001 chrysler concord 2.7 liter timing set

I have a similar problem. I just replaced the water pump and now the POS wont start. Like it is not getting fuel>

Posted on Sep 27, 2008

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Yes be sure the number one piston is at TDC firing stroke or compresson stroke and line up the timing mark pointer is pointed at exactly zero. One more thing when aligning the camshaft sprocket or sprockets be sure that when you are rotating the sprocket for the cam it is rotating in the correct direction and also be sure you observe the intake valve for number one shutting as you bring the marks up to alignment points, the intake valve and the exhaust valve should be shut when the marks line up if not you could have the cam sprocket off 180 degrees, get it right the first time or you may damage a valve trying to start.

Posted on Dec 29, 2009

  • 34 Answers

SOURCE: have a 94 cavalier 2.2 liter,timing chain

Install the cam sprocket, timing chain, and timing chain cover. Make sure the dot on the crankshaft gear is pointing towards the center of the Camshaft gear bolt. Make sure the hole in the Camshaft gear is pointing towards the center of the crankshaft. Be sure to remove the nail holding the chain tensoner back, before installing the timing cover The round hole in the cam gear is the alignment mark

Posted on Mar 13, 2010

Testimonial: "worked, car is running great now, timing jumped 3 teeth"

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SOURCE: timing belt -how to do and retime

Click on the following direct Link. It has the Timing Belt/Pulley Marks - Diagrams for the 1.8L that you will need.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at!

Posted on Mar 27, 2010

Testimonial: "Direct hit. Exactly what was needed"

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SOURCE: I am replacing the timing chain on my 02 saturn. I

okay i posted you a picture of the postion. be carefull not to turn the crank or the cams or you will damaged the valves. let me know if you need more hlep.

Posted on Jul 23, 2010

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1 Answer

Can I replace lifters without replacing the cam?

You could do that, but you may have a worn cam lobe and your problem would not be solved.

Sep 30, 2016 | Cars & Trucks

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Is there a lifter adjustment on 3.2 Isuzu motor

this engine uses hydraulic lifters or lash adjusters as honda calls them. if there is noise, you must either perform the tsb from honda 97-076, or replace the lifters. you can check them by removing the valve covers and slightly rock the lifters back and forth to see if there is abnormal movement. there should be slight pressure against the cam lobes at all times.

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How do i turn the lifter in the right place if i did not take it apart?

It technically does not matter because even though there is an oil hole to one side of the lifter, the oil gallery in the lifter valley pumps oil around the ridge in the lifter. Standard hydraulic lifters can spin anyways.

Roller lifters should be installed same lobe and roller direction. If not sure install with oil hole facing rear. (oil pressure from this direction)

Technically if reused, all lifters should be installed back on the same lobe...if possible. You'd probably be ok with couple unknowns if engine in overall good condition. It's just with a very worn engine and valve train combined with very low oil pressure, switching lifters around could create a condition that could "wipe" a lobe on the cam and a valve could cease to lift.

It's also a good idea to soak clean lifters briefly in oil (until air bubbles gone) to assist in initial valve train pump up.

Hope this helps.

May 30, 2014 | Chevrolet Suburban Cars & Trucks

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1994 Chevy Suburban K1500 5.7L v8 157 thousand miles.. replacing timing chain on the vehicle and after replacement truck ran steady at 1k RPMs. During idle in park the following day the truck died, re

First you need to retrace your steps...before you changed the timing chain and gears did It run ok ? what was initial problem, next put a fuel pressure gauge on your fuel line and cycle your key on to run pos, dont have to try start, just run and see if you have fuel press during the 3 sec or so pump cycles, should be around i think 35-45 roughly for tbi. so if you have good fuel pressure , then you say you have good spark, then your problem is either ingition or valve timing, did your dist.come loose, did you properly install chain & gears and align timing marks. did you have somethine else a part on it too like intake, dist, ? get back with me I'll try to help you.

Apr 09, 2012 | 1994 Chevrolet Suburban

1 Answer

Have a Hyundai Tuson. Worn out cam shaft gear after 107000klms. Rockers worn, cross heads worn. Cam shaft marked a lobe. Can these cams be ground or will you have lifter problems.

if all these parts have wear marks then all the components will have to be replaced with can have the cam reground but its probably cheaper and quicker to replace with new by the time you find a place to weld regrind the lobes and get the part back and hope it won`t give you a problem,so you don`t have to tear down again.

May 21, 2011 | 2009 Hyundai Tucson

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Cdc 5.7vortex fuel injection 96 tahoe when u start it service eng light comes on after about ten seconds itstarts flashing its got a pretty good miss to it hook the box to the plug under dash it said num 4...

If you know that cylinder number 4 is missing and you have replaced everything that you said you have then there can only be one other factor that needs to get fixed... FUEL INJECTOR!!!!

Feb 06, 2011 | Chevrolet Tahoe Cars & Trucks

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1994 mercury grand marquis, i had a slight tick but now it is even louder someone told me lifters but i need another opinion

yes, lifter, and if you don't fix it it will wear out the cam lobe. Use a hose in your ear--move it around the valve covers to locate the problem valve and pull off the valve cover to find the loose rocker arm. This is the one that will need a new lifter. If you have a pushrod engine (versus overhead cam), the intake manifold will also have to come out to get at the lifter. If you have overhead cam engine, the cam will have to come out instead or at least be lifted up to access the lash adjuster/lifter. Depending on the engine and the particular lifter involved, you may have to remove the timing belt as well--can get pretty involved. If you can identify the valve in question and tell me which engine you have, I'd be happy to send instructions on how to do the job.

Thanks for using FixYa.

Feb 06, 2011 | 1994 Mercury Grand Marquis

1 Answer

Are the valves adjustable?

hi, on your vehicle the valves are not adjustable after about 1990 they started using hydraulic lifters, so if you have top end engine rattle then the chances are these lifters will need replacing or worse case the cam lobes could be worn if this is the case then your going to need to do a top end rebuild.

to replace the hydraulic lifters your going to need to remove the cams so as you can get to the lifters under neath the cup they sit under so its quite a big job.

the older type valves were a lot easier as you could adjust them with screwdriver and measuring guages but they started using the new ones as they made less noise and lasted longer, but the downside to this was that you need to do more work to replace the lifters.

let me know how you get on or if you need further assistance ok

Jun 13, 2010 | 1994 GMC Sonoma

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How do i ajust my lifters on a chevy 350 tbi

they are hydralic and are not adjustable during normal maintenence
if you removed heads then you need to adjust them
if they are clicking then a lifter may be bad or the cam shaft is going flat

Mar 22, 2010 | 1992 Chevrolet K1500

1 Answer

Any solution short of a valve job?

I have had the same problem on several chevrolets in the past. The problem was either a broke rocker on the valve trane or the most common is a flat cam lobe. A flat cam lobe will not let the valve open fully or not at all.

Aug 14, 2008 | 1997 Chevrolet Suburban

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