Very nice 455 timing cover for sale. It looks like it may have been installed due to bolt head impressions. but it doesn't look like it's been used. Super clean and virtually no wear. $75.00 + ship. Thanks, Mike
2nd in line please. Looks like a piece of gasket material or a bit of a chunk missing out of the gasket shoulder there...?
Oh, gee is that how it works? I never would have guessed after rebuilding three of them myself. I suppose it doesn't matter how much existing pocket wear is on the cover - hey, you can always fix it with a magic gasket or two right?:TU:
If the end play is too great it will have low pressure. The wear on the end plate and the pocket along with side gear clearence make the oil pressure. Too much wear in the pocket is bad end or side scoring is bad. If the pocket is scored at the gear end plate a thrust plate can fix that. On the other end it requires machining and adjusting the end play as shown. If there is side scoring in my experience they are junk. I have heard of an anealing process but have never tried. I found a NOS one for 275 for my car. Thanks BB Sam
Mike, I'm sorry for getting of coarse with your thread I should know better after all these years. As per board rules I will wait and see if it gets to me, Chris
Ok, here are the pics as requested. I definitely do not want to send someone a part that they are not happy with. I can take measurements if one so wishes. Mike
Mike, I got the covers to day and they are great like I suspected. Thank you! Let me know it you come up with some more! Chris
Erik, you have alot to learn. To you it sounded like "condescending idiocy. And, you know, inaccurate". When really all I mentioned was that the gasket controls the end play. The book you are getting your info from is a 40 odd year old "Service Manual" that uses a gasket with a different material then used today, and it also crushed different then todays gaskets. The way that book shows to do it is at bast a guessing game now days. I will qoute this from the manual. Using the feeler gauge method "Clearance should be between .0023 and .0058. If clearance is LESS than .0018 CHECK timing chain cover gear pocket for evidence of wear. 1st thing I see when I read this is that the window for end play is .0023 to .0058 correct me if I am wrong here but is it not telling you that as low as .0018 and as high as .0058. That is a huge .004 window. #2) I am not sure but back when this book was produced they only had 1 thickness of gaskets in the parts room and also the pump gear sets were manufactured to GM's spec and the pockets were machined spec also to accommadate these gears as things were on the assembly line. #3) Fast forward abunch of years here. You say you have done 3 covers, what gaskets did you use? What gear sets did you use? And how did measure the end play? Forget the manual just for a few minutes here and think these things over. Mike T and I talked about this a few years back, these gears and gaskets have been manufactured by MANY different company's over the years. Too who's spec's? Not GM's. Now the window might have just got bigger. Did you know there are several different thickness's of stock replacement oil pump gaskets. Did you know that gear heights can vary from manufacture to manufacture, that is part of the reason TA makes oil pump gasket kits. I have measured up too .002 differents in height between the drive gear and the driven gear from the same box. On a regular basis I have to resurface the area that the pump gasket sits on the cover because its not true anymore. The cast iron trust plate, its the only way to build these covers. It gives a more solid wear area, it also so acts like a gridle to help keep the pump stable. I have also seen the cast iron trust plate have a .006 dish to it. Erik, I hope you don't take any of this as a attack. That is not my intent at all. We haven't talked about oil mods yet:grin: Chris
