Silent/Balance Shaft

Blaiser17 · #1 05-22-2006, 07:29 PM

Ok. Originally I was told when I bought this 92 eclipse gsx turbo, it possibly had a broken balance shaft but the person wasnt sure. It was not running when I bought it. After examining it I found that the timing belt had slipped causing, one of the valve heads to break when it hit one of the pistons coming up, and it jammed in between the piston and the cylinder head causing the car to not turn over. This also obliterated the spark plug, and ruined that piston. Now that I got the jammed valved out, the engine turns over by hand, there is no longer a lock. The only thing is now I question the balance shaft or silent shaft. To take it out would be expensive because the specialty tools to do that are expensive. Is there a way to tell from the outside if the balance shaft/silent shaft might be broken? If so I would greatly appreciate a response. Thanks guys.

blk_srt · #2 05-22-2006, 11:07 PM

Just get a bs removal kit. They are like $40 from sbr or you could get the front cover from a 4g61 and use that

gthompson97 · #3 05-23-2006, 12:28 AM

Are you going to replace anything else besides the valve that busted? The guides on the bent ones are probably fucked and if the piston is dented you'll have to replace that too. And then you'll have to re-ring the block and all the good stuff. Might as well just do a full re-build.

Blaiser17 · #4 05-23-2006, 04:21 PM

I was gonna buy a new cylinder head instead of dealing with each individual valve, and just the one piston was dented so I'll buy a new one, but other than that I was gonna leave it be besides the whole balance shaft thing. What pr ricer said sounds good though. I'll just buy an eliminator kit and eliminate a present or future problem.

Thor06 · #5 05-23-2006, 05:46 PM

Wait, so the valve head was wedged between the piston and cylinder wall? Sounds like the block is fucked to me. If it gouged into the cylinder deep enough to make it not turn over, I bet the gouge is too deep to be bored out. I hope you didnt pay much for the car.

blk_srt · #6 05-23-2006, 05:57 PM

thats what sleeves are for if the gouges are to deep, but he said it wa stuck between the piston and head

gthompson97 · #7 05-24-2006, 12:25 AM

I've never replaced just ONE piston, I always do all 4 of them at once so you know everything is worn out the same amount.

I'm also still not sure exactly what happened, what is getting stuck and where? The valve would have to be bent as FUCK to be wedged between the cylinder and the piston. Or is it bent so that the valves won't close all the way, therefore the piston hits the vavles and can't do a complete stroke?

And it'll be alot cheaper to just replace the valves and guides rather than buying a whold damn new head.

blk_srt · #8 05-24-2006, 01:06 AM

he said that the valve head broke off and got lodged between the piston and the head which probably fucked the head in the process. I should know my buddy just did the exact same thing in his camaro(except a rocker arm broke)

gthompson97 · #9 05-24-2006, 01:35 AM

Ahhh I get it now, I was reading it wrong before. In that case, I also agree that the head is probably fucked if it wedged the valve head between the piston and a chunk of aluminum

Thor06 · #10 05-24-2006, 02:52 AM

Sleeving would cost more than just a new block wouldnt it?

-Josh- · #11 05-24-2006, 09:44 AM

I would just rebuild the engine, rebuilding is the funnest thing to do i dont know why you would pass on the opportunity.

blk_srt · #12 05-24-2006, 09:49 AM

depends on what kind of deal you can get for a block. Not only that but if you sleeve it you get added strength as well

defiancy · #13 05-24-2006, 01:57 PM

This is the same condition that my car was in when I bought mine. Timing belt slipped causing two valves to fall off into the cylinders and punched through the pistons.

You shouldn't have to replace the block.

You should replace all for because you are going to have to tear down the whole motor and get it re-bored and honed. Get a new head and the balance shaft removal kit.

Blaiser17 · #14 05-24-2006, 02:14 PM

Well see, the block is fine, the valce head which broke off was just rolling around on its side on top of the piston causing the engine to only turn about 40 degrees by hand. I really lucked out cause it seems that the block is in perfect condition, and even the cylinder wall for that piston is in perfect shape, not even a knick. The other three pistons are also in perfect shape. I will end up buying a whole new set though just so I know when they were put on, and leave the good three as backups. I have the option of getting the head redone by getting 4 new valves for that particular piston, although just the one seems to be in bad shape (the one which broke). Or I also jave the option of buying a new head and just use that. I'm having a hard time finding someone in the area which will rebuild it for me, so it looks like I might have to rent a C-clamp and take out the spring and valve myself. I will also have to re-bore the valve seat because it has been a little scratched. How does that sound? Thanks all of you for your help, I'll keep you updated.

Blaiser17 · #15 05-24-2006, 03:10 PM

I bought it for $400 by the way.

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