89 gmc 1 ton 454bbc clutch bleeding trouble?

Question

i have spent the last week of my time everynight trying to bleed this clutch and im getting pretty angry. i spent from 1 to 7 pm doing it one day and i still cant get it bleed. i have tried a vacum pump. iv tried letting it just gravity feed overnight. i have tried everything. i found out my rod in my slave cylinder wasnt on my fork and i put it back on adn the clutch worked!. BUT then i wanted to make sure it was bleed good and had my buddy hold down the clutch adn i opened the bleeder vavle and tightened it and then it stopped working. i tried everything again. still nothing. all my mechanic buddys told me they hate bleeding clutches and tell me it is a b@#$h and they no wat im going thru. but im tierd of waiting and spending time on this thing. i have got to get it out of my barn so i can get my other vehicles done. please someone help me im am sick of this.

Answer 1

If this was me and I had trouble. I would disconnect the pipe that comes out of the master main cylinder. Then fill reservoir, hold finger over the hole the pipe goes into.witha rag underneath get someone to push the clutch down , make sure finger is over hole when you take foot off clutch pedal otherwise air gets in, push pedal down again slowly allowing fluid to squeeze out of the hole past your finger, your finger is acting like a one way valve. Hold finger on hole and release foot of pedal, do this until the fluid comes out without any air bubbles in it. If you cannot get this fluid to come out, well maybe the master cylinder is faulty. So when it is up to this part . When you push pedal down it immediately should feel resistance as you are holding finger over hole, but you must have light touch as your finger cannot hold back powerful push of foot. We call this now the master cylinder as bleed. Now fit pipe back in quickly. Now I would have had the pipe off the slave cylinder also. ( but only ONLY if I had really difficult trouble. And hold finger over the pipe at the slave cylinder end. So again your finger is acting as a valve, as whe you release the clutch pedal your finger will be over the hole and not at all allow any air back into the system. When you have fluid come out from under finger when pedal is pushed down slowly , up and down, watching when no more air comes out. Then connect pipe to the slave cylinder. When pipe is tight. Then push the clutch down and open the bleed their should be enough pressure to. Have some air and fluid to come out. Then close bleed. Push food down, open bleed watch if air and fluid comes out until it runs clear fluid and no air. If so you should have a clutch that works. This would take me about 2 or 3 minutes to understand and correct this problem. As I would know to short cut some of this proceedure. But hopefully when you have little knowledge I can only telly once on this question for you to getting correct. If this does not work well you just do not understand, but good luck.

Answer 2

Im guessing you have the external slave cylinder type with bearing throwout. What i have found on some of these is that the o-ring seal from the hose to the slave cylinder gets bad from the heat thats around it. to me it sounds like your sucking air back in to the system. A method that you might try is actually remove the slave cylinder off the side of the transmission and manually depress it all the way in by hand. it will be a little difficult to push all the way in but guess which way air travels in a line... up.

if u cant get it to pump up at all start looking at chaffed lines or bad o ring seals at the slave and master cylinder. if you put a new master cylinder on it they must be bench bleed first or you have a nightmare of a time bleeding all the air out of the system. due to the fact that your trying to push air down the system and when you let off it sucks it back up to the top....

Answer 3

Im guessing you have got the outside slave cylinder kind with bearing throwout. What i have found on a few of these is that the o-ring seal from the hose to the slave cylinder gets dangerous from the warmth thats round it. To me it sounds like your sucking air back in to the system. A procedure that you just could are attempting is really take away the slave cylinder off the part of the transmission and manually depress it all the means in by way of hand. It'll be a bit of complicated to push all the way in but guess which means air travels in a line... Up. If u cant get it to pump up in any respect begin watching at chaffed traces or dangerous o ring seals at the slave and grasp cylinder. If you put a brand new grasp cylinder on it they must be bench bleed first or you may have a nightmare of a time bleeding all the air out of the process. On account that that your seeking to push air down the procedure and whilst you let off it sucks it back as much as the top....

Answer 4

well if it just not coming out at all, do this.

Don't just open it, take the bleeding bolt completely out, to where it is just the tube, if it doesn't come out then you have a plug, but if u do then put it back on while it's bleeding out. ( you will go through a lot of brake fluid but it's wats gotta happen), slowly put back on the bleeeding bolt, and slowly tightin it till it stops bleeding, then slowly open it again, to get the hang of it...

most important part, is knowing ur vechile and how it works in everyway, nothing is the same!! just get to know, ur vechile and get dirty, it's just gonna happen anyways.

Answer 5

Here's what you do- should have done first; Go to the library and look in Chilton's Auto Repair manual for your car. Read how it says to bleed your clutch. Go back to thebarn with all the knowledge you gained and make short work ofthe job. Smile a big smile.