From m1garandusa at verizon.net Sun Jun 6 20:20:30 2010 From: m1garandusa at verizon.net (James J.) Date: Sun, 06 Jun 2010 22:20:30 -0400 Subject: [Mgb-v8] Should I be fretting over fretting In-Reply-To: References: , <1272480636.14477.24.camel@kgrider-laptop>, ,

Message-ID: <4C0C576E.1080307@verizon.net> All, I just bought an early spec Rover 3.9L block and had it honed out to take the Ford 255 pistons as part of a 4.9L conversion. Without going into details, I was checking it out when it came back and I've noticed that two of the caps do not "snap" into place, like I've been taught they should. They have no perceptible wiggle, but they can be slid fore and aft when fully in position. Again there is no "click" when you put them into position one edge at a time like I've has with other Rover blocks. When you read Des Hammil's book on power tuning the Rover engines, he would suggest that an engine like this be scrapped, less it succumb to the "black death" of fretting. He dedicates probably a half-dozen pages as to why blocks like this shouldn't be used in a rebuild. Can any one confirm if this is as big of an issue as he makes it out to be? He also implies that the only solution is to have that part of the engine machined a bit lower and then align-honed with the caps in place. Is this the only way, or could I slip in a bit of shim-stock along side the cap to reduce fretting? I'm also going to check for cracks tonight. I've already had my Buick 300 crank turned down for the 3.9 mains and internally balanced, which is why I'm trying to stay with w 3.9 instead of a cross-bolted 4.0L V/R James From therays at ellijay.com Fri Jun 18 14:56:46 2010 From: therays at ellijay.com (The Rays) Date: Fri, 18 Jun 2010 16:56:46 -0400 Subject: [Mgb-v8] I have an MGB V8 question Message-ID: I have an MG question I hope someone can answer for me. My car is missing when it is under a load. It only occurs when the engine has gotten warm and I am gradually accelerating. Doesn't seem to do it at full throttle. I have replace the plugs and wires but to no avail. Any thoughts on what my problem might be ? From mgb_zenkus at yahoo.com Fri Jun 18 17:07:22 2010 From: mgb_zenkus at yahoo.com (Bill Zenkus) Date: Fri, 18 Jun 2010 16:07:22 -0700 (PDT) Subject: [Mgb-v8] I have an MGB V8 question Message-ID: <569178.24458.qm@web82502.mail.mud.yahoo.com> What are you running for ignition? Stock dizzy, points and coil, or something else? (also with or without the resistance wire in the stock harness?) Sent from Bill's iPhone! On Jun 18, 2010, at 4:56 PM, "The Rays" wrote: I have an MG question I hope someone can answer for me. My car is missing when it is under a load. It only occurs when the engine has gotten warm and I am gradually accelerating. Doesn't seem to do it at full throttle. I have replace the plugs and wires but to no avail. Any thoughts on what my problem might be ? _______________________________________________ Mgb-v8 at autox.team.net Donate: http://www.team.net/donate.html Suggested annual donation $11.47 Archive: http://www.team.net/archive Forums: http://www.team.net/forums Unsubscribe/Manage: http://autox.team.net/mailman/options/mgb-v8/mgb_zenkus at yahoo.com From m1garandusa at verizon.net Fri Jun 18 17:54:31 2010 From: m1garandusa at verizon.net (James J.) Date: Fri, 18 Jun 2010 19:54:31 -0400 Subject: [Mgb-v8] I have an MGB V8 question In-Reply-To: References: Message-ID: <4C1C0737.1030000@verizon.net> OK, I suck at diagnosing ignition problems (somebody correct me if my logic is way off) but here goes: First, by "missing", do you mean "knocking"/"pinging" or is it hesitating? If it's knocking, consider this: Do you have a vacuum-advance on your distributor? Might want to check for leaks/cracks. If it's hesitating, and you have a carburetor, check your acceleration enrichment mechanism. Heat can cause all kinds of issues with carbs, from mechanical binding/expansion. If it's just one or two cylinders not firing, I don't know what to tell you (if it;s EFI, it's remotely possible that a intermittent injector short/open circuit could cause this) Again, if I'm way off here, somebody correct me so I can learn from this, too. V/R James J. The Rays wrote: > I have an MG question I hope someone can answer for me. My car is missing > when it is under a load. It only occurs when the engine has gotten warm and > I am gradually accelerating. Doesn't seem to do it at full throttle. I > have replace the plugs and wires but to no avail. Any thoughts on what my > problem might be ? > _______________________________________________ From neil at droopy.com Fri Jun 18 22:02:37 2010 From: neil at droopy.com (Neil Moore) Date: Fri, 18 Jun 2010 23:02:37 -0500 Subject: [Mgb-v8] I have an MGB V8 question In-Reply-To: <4C1C0737.1030000@verizon.net> References: <4C1C0737.1030000@verizon.net> Message-ID: <072b01cb0f64$4194ad00$c4be0700$@droopy.com> Another thing to check is your firing order.. I had my plugs changed at a place I swear was like out of Ferris Buellers day off... I take in my red MGB-v8 and they said.. we will take care of her.. we are professionals.. anyways.. they crossed 6 and 8 .. and I had issues -----Original Message----- From: mgb-v8-bounces at autox.team.net [mailto:mgb-v8-bounces at autox.team.net] On Behalf Of James J. Sent: Friday, June 18, 2010 6:55 PM To: The Rays Cc: MG-V8 List; Buick-Rover V8 List Subject: Re: [Mgb-v8] I have an MGB V8 question OK, I suck at diagnosing ignition problems (somebody correct me if my logic is way off) but here goes: First, by "missing", do you mean "knocking"/"pinging" or is it hesitating? If it's knocking, consider this: Do you have a vacuum-advance on your distributor? Might want to check for leaks/cracks. If it's hesitating, and you have a carburetor, check your acceleration enrichment mechanism. Heat can cause all kinds of issues with carbs, from mechanical binding/expansion. If it's just one or two cylinders not firing, I don't know what to tell you (if it;s EFI, it's remotely possible that a intermittent injector short/open circuit could cause this) Again, if I'm way off here, somebody correct me so I can learn from this, too. V/R James J. The Rays wrote: > I have an MG question I hope someone can answer for me. My car is > missing when it is under a load. It only occurs when the engine has > gotten warm and I am gradually accelerating. Doesn't seem to do it at > full throttle. I have replace the plugs and wires but to no avail. > Any thoughts on what my problem might be ? > _______________________________________________ _______________________________________________ Mgb-v8 at autox.team.net Donate: http://www.team.net/donate.html Suggested annual donation $11.47 Archive: http://www.team.net/archive Forums: http://www.team.net/forums Unsubscribe/Manage: http://autox.team.net/mailman/options/mgb-v8/neil at droopy.com From paul.hunt1 at blueyonder.co.uk Sat Jun 19 02:27:11 2010 From: paul.hunt1 at blueyonder.co.uk (Paul Hunt) Date: Sat, 19 Jun 2010 09:27:11 +0100 Subject: [Mgb-v8] I have an MGB V8 question References: Message-ID: <57DD6E9FB3F24714B63E079CF2C798CB@paul> I would also question whether it is missing or simply hesitating or flat-spotting. The latter can be caused by an incorrect profile needle (if SUs or other CD carb) giving weak mixture at part throttle acceleration, needing full throttle to get past it. As confirmation you can richen the mixture and if that cures it fit a 'richer' needle i.e. one that tapers more rapidly. If misfiring which should cause popping and banging in the exhaust the other important question is, is the tach fluttering when the symptom occurs or is it steady? If fluttering then it is an ignition LT problem i.e. ignition feed, coil, points, distributor ground wire, and connections between them. If steady then it points to HT or fuel, but could be condenser. But without knowing what engine, fuel or ignition systems you have it is very difficult to advise further. PaulH. ----- Original Message ----- >I have an MG question I hope someone can answer for me. My car is missing > when it is under a load. It only occurs when the engine has gotten warm > and > I am gradually accelerating. Doesn't seem to do it at full throttle. From michaelwjose at hotmail.com Mon Jun 21 19:22:00 2010 From: michaelwjose at hotmail.com (Michael W. Jose) Date: Mon, 21 Jun 2010 18:22:00 -0700 Subject: [Mgb-v8] V8 Conversion Advice Message-ID: Hello O Wise MG Sages, I am a super lurker as I have not had much time or money to play with my very neglected 79 B. I have recently been sorting her out, renewing hoses and rubber bits; turning the engine over by hand, etc. to ease her back onto the road, now that I have my own house and garage to work in. I have an opportunity to purchase a 99 Land Rover Discovery with a 4.0 V8 for a song and I'm considering the swap. I would have to take possession of the entire vehicle (major collision but was 'still running' when parked a couple years ago). For those who have BTDT, which bits should I grab and which should I leave? I would like to use as much of the injection and ignition systems as I can, though I understand maybe a bit of modification might be necessary. If you have any insight, or just want to encourage or discourage me, please reply. Much thanks in advance. Your humble fellow MG enthusiast, Mike Jose 79 MGB Chandler AZ PS- Thanks to Mark for your patience... I thought I did it right last time, but it was a keyboard-to-chair interface error, it seems. Thanks for all you do! The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. Get busy. _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID2832 6::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4