I might have bitten off more than i can chew...304 rebuild

Mudrat

OH! I feel so validated :wink: :?: 76CJ7 - seriously, make sure the hone is rotating when you put it in and take it out - no straight up and down action - your 'motor' won't like it :t: And do use lots of lube :idea:

CLE_76CJ7

Who knew this could be so much fun! :lo1l: . i'll get it on the stand friday and then let the good times roll!!!

jeepsr4ever

Its hard to get the hard moly top ring to seat on a fine or wrong crosshatch. Hard to say where exactly the crosshatch is at but take it from me it can be a bear to break ring set in. You should use a set of iron rings at this point and with iron you can get away with almost any type of circular surfacing so most any hone will do!

CLE_76CJ7

My pistons already had a new set of rings on the when i took on this little project, how do I differentiate moly rings from iron ones. Is there a performance difference between the two?

82Waggy

Yes, Iron rings hate unleaded fuel.

Mudrat

82Waggy wrote
Yes, Iron rings hate unleaded fuel.

OK, this is one I can't answer - and obviously 76CJ7 doesn't want to run he engine for 4-5K to find out he oopsed. :roll:

So MY question - do Moly rings react magnetically like the iron ones? Or how does one tell what rings 76 has now (knowing he should change them anyway... :idea: )

CLE_76CJ7

My cousin replaced the rings when he started on the motor, but it has been so long, he doesn't remember the details ](*,)

Dusty

Mudrat wrote
I have the Haynes, Chiltons and TSM for mine - but your Chiltons will get you through, with help from the board here (or in Dusty's case bored 8) wazzup Bro? :? )

................[\quote]

Pat you need more projects.... 🙁:

CLE_76CJ7

OK, I began installing the pistons and connecting rods into the block. It all went smooth until I got to the number 6 cylinder. The rod is too wide to fit on the crank journal with the number 5 rod :banghead: . The rod on the number 5 cylinder is what gave out and blew the motor in the first place, so it is new (or new to this motor) Do the rods come in different widths? It is between 1/32 and 1/16 too wide. I am assuming it is the number 5 rod causing the problem, I got frustrated and gave up for today. I'm going out again tomorrow to pull the number 5 back out to measure the width and that of the number 6 rod. Am I going to need to shell out the funds for a new set of rods? :dontknow: I got out to measure the rods and I was correct...the number 5 measures 1 1/64" and the number 6 measures 31/32". What do I need to do?

jeepsr4ever

Sounds like you got a 258 replacement rod instead of a 304/360 rod...same dimensions only the bottom end is wide!

ironman_gq

get a 304 replacement rod from your local parts store. Napa and autozone should work.

« Previous Page