2G timing issues causing vibration

[tagartz]

so i tried to replace my lifters on my 98 gst to get rid of the ticking sound. got the part from ebay , because dealer was charging me 700 for the set. replace the lifters and engine sounded and vibrated like hell. so i put the old one's back. engine still has vibration and no power. i have a haynes manual and vfaq pdf followed procedures 3 times, marks are all set from cam to crank, check hoses and connectors but engine still runs like crap. did some research and found that BS can cause vibration, so i did the procedure for the BS, ran the car but no success. engine still has vibration and no power, rpm goes up and down, engine sounds like its about to die.. i really need some advice i dont have money to bring her to a shop. any help will be appreciated.. tnk u DSMians.. will do more research.

 

[belize1334]

When you did the lifters, did you at any time remove the cams or cam gears? If so you may need to check that they were all reinstalled in the proper position/orientation.

It is also possible that you didn't correctly "deflate" the lifters before running the engine. This can cause the valves to be pushed too far in when you start it up for the first time which will in turn cause valve damage.

I say, now that you've run it and you're not likely to hurt anything that isn't already hurt, do a compression test. That'll tell you right away if you've got a non-sealing valve or else your timing is off. If the timing is off you'll get low compression across the board. If you've got a bad valve you'll get low compression just on that one cylinder (unless you've got one on each cylinder).

 

[LiquidX]

After installation and assuming you took off the cams to install the lifters properly, did you turn the crank by hand to be sure everything lined up properly and there wasn't any binding?

 

[assault187]

I would check and make sure the balance shaft is set properly in phase. Most people pop the timing belt off to remove cams and install lifters...so it may have been missed when doing timing?. The balance shaft may appear to be in phase (marks line up) but it actually needs to be rotated again and once again lined up. This may be the vibration issue...

 

[tagartz]

used procedures from vfaq to corectly line up balance shaft and keep it steady. still doing research and going over my work. will do a compresion check will get back with updates. thanks for all the help DSMians

 

[tagartz]

went over my work everything aligns right but when my friend did a vaccum test he told me late ignition. what could cause this other than timing?

 

[tagartz]

bent valve on cylinder # 4. bringing to machine shop asap.