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useless 340blocks... rant... #484276 09/30/09 04:33 PM 09/30/09 04:33 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	just spoke to machineshop where i left a nice 340 block with almost no wear in the originalbores to just have it bored .030over and just straighen out the decks, after boriug it out they found some rustpitting in several bores, low in the bores but still... od thing is that the machineshop said the waterjackets looked fine when they took out the freezeplugs before boring it out and this block has just been living a harmfree life in a warm garage for most of its life not even in a car. i gues it may be a lesson for others about having there blockes checked out to be sure the bores are nice and thick for real and not just hope they are not realy sure what to do now, there is not a lot of 340blocks around and it feels pretty useless to buy another one and hope its better

Re: useless 340blocks... rant... [Re: 1Fast340] #484277 09/30/09 04:56 PM 09/30/09 04:56 PM
Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH WILD BILL Senior Member of the Junior Dragster Club
WILD BILL Senior Member of the Junior Dragster Club Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH	If it can't be cleaned up safley by boring you could always have it sleeved.

Re: useless 340blocks... rant... [Re: 1Fast340] #484278 09/30/09 04:58 PM 09/30/09 04:58 PM
Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif. P PUNK top fuel
PUNK top fuel P Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif.	Time for a new R3 Replacement 340 block. 10.53 @ 125mph. 1.37 60 foot. Caltracs and Monoleafs, AFCO shocks. Heads by INDIO MOTOR MACHINE; IMM. CP Pistons, PC Carbs.

Re: useless 340blocks... rant... [Re: WILD BILL] #484279 09/30/09 05:00 PM 09/30/09 05:00 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	Quote: If it can't be cleaned up safley by boring you could always have it sleeved. the sad thing is that since the bores where so nice and clean before boring i have a feeling that these pits come from the waterjackets and that all the bores may be way to thin and that the block may be to week to be safe to use even with sleeves, but i will have a word with them tomorow again and se for myself how bad it looks and what can be done

Re: useless 340blocks... rant... [Re: PUNK] #484280 09/30/09 05:07 PM 09/30/09 05:07 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	Quote: Time for a new R3 Replacement 340 block. im afraid your right, but those dont seem to like sollidroller lifters from what i have read in the catalog and thats kind of a dealbreaker for me my plan was to just have a new block and lower compression to be able to use most of my old parts from the last broken 340 while adding a blower, this hobby sure gets expensive quickly and feels like i may endup replacing and buying alot more parts than was planed

Re: useless 340blocks... rant... [Re: 1Fast340] #484281 09/30/09 05:08 PM 09/30/09 05:08 PM
Joined: Jun 2009 Posts: 705 Michigan H Hemiroid super stock
Hemiroid super stock H Joined: Jun 2009 Posts: 705 Michigan	Are you sure it isn't porosity? If it's below the swept area of the rings and it isn't into a jacket it will be fine. It may have been that way from the factory. We ran (and are still running) a mega block in a S/C car that was porous below the rings for many years.

Re: useless 340blocks... rant... [Re: Hemiroid] #484282 09/30/09 05:24 PM 09/30/09 05:24 PM
Joined: Jan 2003 Posts: 3,103 Phila Pa S scatpacktom master
scatpacktom master S Joined: Jan 2003 Posts: 3,103 Phila Pa	At our first race this year I had water in number four.Didn't really think anything of it,just thought the headgasket blew.Anyway got it apart and it was a rust hole right in the middle of the bore.That really torqued me as I had just freshened it 3 races ago. I ended up with 2 sleeves. Another cylinder had what I thought was a "funny mark" so instead of messing with it I had them knock it out. So in my case both cylinders had one tiny little rust pit. Machine shop said they never hit any water and they wailed it out to 4.2-something for the sleeves.I figured it was air bubbles. Gotta figure these things have been rusting fo 40 years now.It sucks I know

Re: useless 340blocks... rant... [Re: scatpacktom] #484283 09/30/09 06:54 PM 09/30/09 06:54 PM
Joined: Jan 2007 Posts: 3,695 nc E emarine01 master
emarine01 master E Joined: Jan 2007 Posts: 3,695 nc	Rust never sleeps

Re: useless 340blocks... rant... [Re: 1Fast340] #484284 09/30/09 11:49 PM 09/30/09 11:49 PM
Joined: Aug 2003 Posts: 43,163 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,163 Bend,OR USA	If the block has no holes in the cylinders(have it pressure check at or above 25 lbs of pressure) and the pitting is below the ring travel run it The pits may be casting flaws, sand in the metal that turned to rust, not unusual, especially in 351W Fords over here Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: useless 340blocks... rant... [Re: 1Fast340] #484285 10/01/09 01:14 AM 10/01/09 01:14 AM
Joined: Jan 2003 Posts: 6,139 Melbourne , Australia LA360 master
LA360 master Joined: Jan 2003 Posts: 6,139 Melbourne , Australia	I remember when I was building a 360 years ago, I went through 4 blocks before I found something decent. The one I used was one the machine shop supplied me. I ended up selling that one off too and buying a R3. With almost 40 years of wear and tear; and in many cases, water jackets that never saw an anti corrosive, it's just not worth risking. If someone ever came out with a reasonably priced factory replacement block, they'd sell like hot cakes. AL.... Alan Jones

Re: useless 340blocks... rant... [Re: 1Fast340] #484286 10/01/09 09:02 AM 10/01/09 09:02 AM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: Quote: If it can't be cleaned up safley by boring you could always have it sleeved. the sad thing is that since the bores where so nice and clean before boring i have a feeling that these pits come from the waterjackets and that all the bores may be way to thin and that the block may be to week to be safe to use even with sleeves, but i will have a word with them tomorrow again and see for myself how bad it looks and what can be done Why would you think that ? The sleeve is made of a better material and is uniform in thickness , it's better that the original material the block is cast from. Even if they hit water you can seal the inside of the block and not have any issues .

Re: useless 340blocks... rant... [Re: 1Fast340] #484287 10/01/09 11:58 AM 10/01/09 11:58 AM
Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif. P PUNK top fuel
PUNK top fuel P Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif.	Quote: im afraid your right, but those dont seem to like sollidroller lifters from what i have read in the catalog and thats kind of a dealbreaker for me my plan was to just have a new block and lower compression to be able to use most of my old parts from the last broken 340 while adding a blower, this hobby sure gets expensive quickly and feels like i may endup replacing and buying alot more parts than was planed Solid rollers is a non-issue. The solid rollers that Comp Cams just started making attaches the link bar to the front side of the lifter body and the link bar is bent in a way that give ALOT of clearance. Brian at IMM hleped out on these lifters quite abit and has many pictures. I just finished building a 59 degree lifter R3 block and used his lifters. No problem at all. He did recommend using a custom cam with a smaller base circle to add extra insurance so the lifter does not uncover the oil galley. From the sounds of it, you would want a custom cam anyways. It doesnt cost any extra to have that done to the cam. 5517441-P9230023.JPG (62 downloads) Last edited by sloan; 10/01/09 02:01 PM. 10.53 @ 125mph. 1.37 60 foot. Caltracs and Monoleafs, AFCO shocks. Heads by INDIO MOTOR MACHINE; IMM. CP Pistons, PC Carbs.

Re: useless 340blocks... rant... [Re: PUNK] #484288 10/01/09 12:03 PM 10/01/09 12:03 PM
Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif. P PUNK top fuel
PUNK top fuel P Joined: Dec 2004 Posts: 1,717 Rancho Cucamonga, Calif.	sorry about the photo. i dont know why it didnt finish loading. This is the R3 block with Indy heads T&D rockers and Manton pushrods mach'd up with the Roller lifters from IMM/OU812 moparts member. This photo if it ever successfully loads is just mach'd up and not final assembled. 10.53 @ 125mph. 1.37 60 foot. Caltracs and Monoleafs, AFCO shocks. Heads by INDIO MOTOR MACHINE; IMM. CP Pistons, PC Carbs.

Re: useless 340blocks... rant... [Re: PUNK] #484289 10/01/09 12:29 PM 10/01/09 12:29 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 top fuel
viperblue72 top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	I had some rust pits in one cylinder on my 360. It didn't hurt anything. My machinist said they shouldn't hurt anything and they never did. This was in an 550 horse 408 stroker. I say if they aren't that deep, run it.

Re: useless 340blocks... rant... [Re: viperblue72] #484290 10/01/09 08:03 PM 10/01/09 08:03 PM
Joined: Jan 2003 Posts: 6,139 Melbourne , Australia LA360 master
LA360 master Joined: Jan 2003 Posts: 6,139 Melbourne , Australia	Did they Sonic test that area? A machinist friend honed a block one time and the bores wouldn't stay round. Upon closer inspection he noticed a couple of holes in the area he was having trouble with. He put the sonic tester onto it and it was paper thin, so much so that with a tap with a screwdriver, it went through the cylinder wall. It could be a hole in the casting and nothing a sleeve won't fix, I had a Hemi six that had the same problem. Ran fine for years. AL... Alan Jones

Re: useless 340blocks... rant... [Re: LA360] #484291 10/12/09 05:24 PM 10/12/09 05:24 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	ok have checked the block out with the guys at the machineshop and we have decided to give it a try anyway it seams to just be somekind of casting flaw and looks much better after honing and except for that its just fine and that is under the area swept by the rings so i will go forward with this timebomb project and it will hopefully be good enough and that will probably not be the weakest point of this motor anyway and thanks for the pics of the lifters in the R3 Block that is some very good information to know about and not just for me, i bet im not the only one who have somehow missed this information about those lifters that i bet would make a good diference in a stock block also

Re: useless 340blocks... rant... [Re: 1Fast340] #484292 10/12/09 11:45 PM 10/12/09 11:45 PM
Joined: Feb 2005 Posts: 982 western pennsylvania b1dartsport super stock
b1dartsport super stock Joined: Feb 2005 Posts: 982 western pennsylvania	I'm running the crane super pros in my resto block. I just had to do about 2 hrs of grinding to make sure the rivets on the tie bars cleared,no problems so far.

Re: useless 340blocks... rant... [Re: 1Fast340] #484293 10/13/09 03:46 PM 10/13/09 03:46 PM
Joined: Jan 2003 Posts: 25,786 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,786 Rio Linda, CA	Don't think of them as pits, think of them as oil reservoirs. The INTERNET, the MISinformation superhighway

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