Squeaky engine

[MGTC1946@aol.com]

Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for two or three minutes and then I began to notice squeaky sound similar to someone bouncing up and down on old bedsprings coming from the engine. Shut down engine to investigate. Plenty of oil coming out of the rocker assembly and around the rockers. Good oil pressure, 70 pounds. Further investigation revealed that the noise only reveals itself with the spark plugs in the engine. With the spark plugs out of the engine and turning the engine over with the starter, there is no squeaking noise. With the spark plugs installed in the engine and the engine turned over by way of the starter, the squeaking returns. The noise sounds like it is coming from the upper end of the engine, specifically the rocker assembly. I have disassembled the rocker assembly, and inspected and found no sign of galling or other damage. The new rocker bushes are not a particular tight fit, easily slide on and off the new rocker shaft, no pressure required. Other possiblity, sound could be coming from a too tight valve guide, possiblly, have not pulled head yet to investigate. Or noise could be coming from some other area of the engine. Does not not appear to be a pulley noise or belt oriented noise. Has anyone had similar experience? Or have any suggestions? All parts in engine are new and/or re-machined. Thanks for any help you can give. Charlie [Non-text portions of this message have been removed]

[Paroor]

Dear Charlie, I know putting such questions to you is a sin. Are you sure you have the proper spark plug ? Did you mix up with 1/2" and 3/4" ? Cylinder head 22952 got 1/2" plugs. cylinder head 188422 got 3/4" plugs. Did you conduct a compression test ? Madhu -----Urspr ngliche Nachricht----- Von: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com]Im Auftrag von MGTC1946@aol.com Gesendet: Freitag, 20. Mai 2005 05:19 Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for two or three minutes and then I began to notice squeaky sound similar to someone bouncing up and down on old bedsprings coming from the engine. Shut down engine to investigate. Plenty of oil coming out of the rocker assembly and around the rockers. Good oil pressure, 70 pounds. Further investigation revealed that the noise only reveals itself with the spark plugs in the engine. With the spark plugs out of the engine and turning the engine over with the starter, there is no squeaking noise. With the spark plugs installed in the engine and the engine turned over by way of the starter, the squeaking returns. The noise sounds like it is coming from the upper end of the engine, specifically the rocker assembly. I have disassembled the rocker assembly, and inspected and found no sign of galling or other damage. The new rocker bushes are not a particular tight fit, easily slide on and off the new rocker shaft, no pressure required. Other possiblity, sound could be coming from a too tight valve guide, possiblly, have not pulled head yet to investigate. Or noise could be coming from some other area of the engine. Does not not appear to be a pulley noise or belt oriented noise. Has anyone had similar experience? Or have any suggestions? All parts in engine are new and/or re-machined. Thanks for any help you can give. Charlie

[Jennifer and Hugh Pite]

Hi, how about removing all but one of the spark plugs and see if the squeaking persists? Then try the same thing with all the other cylinders. I would guess it is a leaky head gasket since most of the other parts of the engine don't really care if there is compression or not. Hugh Pite

----- Original Message ----- From: MGTC1946@aol.com> To: mg-tabc@yahoogroups.com> Sent: Thursday, May 19, 2005 8:18 PM Subject: [mg-tabc] Squeaky engine > Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for > two or three minutes and then I began to notice squeaky sound similar to > someone bouncing up and down on old bedsprings coming from the engine. Shut down > engine to investigate. Plenty of oil coming out of the rocker assembly and > around the rockers. Good oil pressure, 70 pounds. Further investigation > revealed that the noise only reveals itself with the spark plugs in the engine. > With the spark plugs out of the engine and turning the engine over with the > starter, there is no squeaking noise. With the spark plugs installed in the > engine and the engine turned over by way of the starter, the squeaking > returns. The noise sounds like it is coming from the upper end of the engine, > specifically the rocker assembly. I have disassembled the rocker assembly, and > inspected and found no sign of galling or other damage. The new rocker bushes > are not a particular tight fit, easily slide on and off the new rocker > shaft, no pressure required. Other possiblity, sound could be coming from a too > tight valve guide, possiblly, have not pulled head yet to investigate. Or > noise could be coming from some other area of the engine. Does not not appear > to be a pulley noise or belt oriented noise. Has anyone had similar > experience? Or have any suggestions? All parts in engine are new and/or re-machined. > Thanks for any help you can give. > > Charlie > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > > > >

[E.Worpe]

Hi Charlie, Could the noise be due to a tight gudgeon pin in a piston? The force on the piston, from compressing air in the cylinder may, increase any friction, thus increasing the sound when the spark plug is installed. As suggested by Hugh, remove one spark plug at a time to locate source. Regards, Eric. -----Original Message----- Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for two or three minutes and then I began to notice squeaky sound similar to someone bouncing up and down on old bedsprings coming from the engine. Shut down engine to investigate. Plenty of oil coming out of the rocker assembly and around the rockers. Good oil pressure, 70 pounds. Further investigation revealed that the noise only reveals itself with the spark plugs in the engine. With the spark plugs out of the engine and turning the engine over with the starter, there is no squeaking noise. With the spark plugs installed in the engine and the engine turned over by way of the starter, the squeaking returns. The noise sounds like it is coming from the upper end of the engine, Charlie [Non-text portions of this message have been removed]

[Peter Roberts]

Charlie, Chain tensioner? If its not getting lubrication, it could be the culprit. Try the stethoscope trick to locate the sound. _Peter

----- Original Message ----- From: MGTC1946@aol.com> To: mg-tabc@yahoogroups.com> Sent: Thursday, May 19, 2005 11:18 PM Subject: [mg-tabc] Squeaky engine > Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for > two or three minutes and then I began to notice squeaky sound similar to > someone bouncing up and down on old bedsprings coming from the engine. > Shut down > engine to investigate. Plenty of oil coming out of the rocker assembly > and > around the rockers. Good oil pressure, 70 pounds. Further investigation > revealed that the noise only reveals itself with the spark plugs in the > engine. > With the spark plugs out of the engine and turning the engine over with > the > starter, there is no squeaking noise. With the spark plugs installed in > the > engine and the engine turned over by way of the starter, the squeaking > returns. The noise sounds like it is coming from the upper end of the > engine, > specifically the rocker assembly. I have disassembled the rocker > assembly, and > inspected and found no sign of galling or other damage. The new rocker > bushes > are not a particular tight fit, easily slide on and off the new rocker > shaft, no pressure required. Other possiblity, sound could be coming > from a too > tight valve guide, possiblly, have not pulled head yet to investigate. > Or > noise could be coming from some other area of the engine. Does not not > appear > to be a pulley noise or belt oriented noise. Has anyone had similar > experience? Or have any suggestions? All parts in engine are new and/or > re-machined. > Thanks for any help you can give. > > Charlie > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > > >

[Jay Lockrow]

Interesting problem... One quick suggestion. Put a dab of lubricant on the distributor points where it rubs against the cam. I have had this problem and it sounds like it is coming from somewhere else. Paroor wrote:

> Dear Charlie, > I know putting such questions to you is a sin. > > Are you sure you have the proper spark plug ? > Did you mix up with 1/2" and 3/4" ? > Cylinder head 22952 got 1/2" plugs. > cylinder head 188422 got 3/4" plugs. > Did you conduct a compression test ? > > Madhu > > -----Urspr ngliche Nachricht----- > Von: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com]Im Auftrag > von MGTC1946@aol.com > Gesendet: Freitag, 20. Mai 2005 05:19 > > Today I cranked up my freshly rebuilt XPAG engine. Engine ran smoothly for > two or three minutes and then I began to notice squeaky sound similar to > someone bouncing up and down on old bedsprings coming from the engine. > Shut down > engine to investigate. Plenty of oil coming out of the rocker assembly and > around the rockers. Good oil pressure, 70 pounds. Further investigation > revealed that the noise only reveals itself with the spark plugs in the > engine. > With the spark plugs out of the engine and turning the engine over with the > starter, there is no squeaking noise. With the spark plugs installed in > the > engine and the engine turned over by way of the starter, the squeaking > returns. The noise sounds like it is coming from the upper end of the > engine, > specifically the rocker assembly. I have disassembled the rocker assembly, > and > inspected and found no sign of galling or other damage. The new rocker > bushes > are not a particular tight fit, easily slide on and off the new rocker > shaft, no pressure required. Other possiblity, sound could be coming from > a too > tight valve guide, possiblly, have not pulled head yet to investigate. Or > noise could be coming from some other area of the engine. Does not not > appear > to be a pulley noise or belt oriented noise. Has anyone had similar > experience? Or have any suggestions? All parts in engine are new and/or > re-machined. > Thanks for any help you can give. > > Charlie > > > Yahoo! Groups Links > > > >

[joecurto@aol.com]

Charlie warm up the engine than remove the fan belt and run the engine for a few minutes ( don't over heat), I have a TR4 in shop with similar wide belt and it is new and you would think it was a door with rusty hinges. Joe Curto [Non-text portions of this message have been removed]

[MGTC1946@aol.com]

hello group, tore into squeaky engine today, cylinders look good so far. found troubles at rear main .rear portion of main cap housing making serious contact with groved portion of arkemedies screw. scraper also touching on one side. what should these clearances be? how big is a molecule of oil? first considered removing some material from the archemedies screw to get main cap clearance and remove scraper and replace scraper with moss type seal but then worried that i might be just masking otherwise serious symtoms. put dial indicator on rear main journal and the centre main journal . found small run out areas of .003to. 004. indicating a need for futher investigation. will remove crank in the morning and check in a v block. crank bent? block needing line boring? the day was not without its bright spot though. i caught the neighbors dog hiking his leg on my dogwood tree this morning and hit him dead center from 15 feet with #3 lifter. i guarentee that mut will hereafter squat and hopefully in his on yard. thanks for all of your kind suggestions and feedback. i will perservere, maybe, charlie [Non-text portions of this message have been removed]

[Donald Wilkinson]

RE: " i caught the neighbors dog hiking his leg on my dogwood tree this morning and hit him dead center from 15 feet with #3 lifter. i guarentee that mut will hereafter squat and hopefully in his on yard." What a freakin' grinch that Charlie must be! Wonder if he'd whack his wife in the punkin haid with another lifter if she spilled some coffee? Don TC 7993

[Gene]

Don wrote:

> What a freakin' grinch that Charlie must be! Wonder if he'd whack

his wife in the punkin haid with another lifter if she spilled some coffee?