MAIN
Cylinder Head
Previous Page | Next Page
Can anyone help please? I have a 1098cc MG engine in my 1961 Mk I Frogeye Sprite and have just removed the head for fault analysis for a rattling noise. The Haynes manual (page 37) states there are tappet covers but they are not identified in the exploded view of the engine. Can anyone help to identify where the covers are? and Is it possible to remove the tappets without removing the cam? Many thanks for your help Lee lparke12@... 33529... MORE
Hi Chaps, I've got a 12G 295 stage II head with Rimflo valves on a 1098 bottom end. I need help on head gaskets, the bores have been ground out to 1150 and the head gaskets give up easily. QUESTION: Should I use copper bi-metal or composite? or is there something better? When to tourque the head down, and what settings? Any help appreciated. TIA "gerald_r_simpson" 33523... MORE
Jens.... What, pray tell, are you waiting for? Install the oil pressure limiting valve NOW and you will answer your own question! :) The answer is probably yes. And MAYBE it will also solve that puff of smoke you get out the exhaust after driving from cold a mile or so down the road? But have you changed to a fresh rubber diaphragm within the valve? And don't tell me the valve is new so you don't have to!!! :) Are you (per Guy's post) using the filtered plastic oil filler cap as well? Higher than required oil pressure... MORE
OK, Doug... You indeed have the higher compression 8.9-1 motor. Thought so. And you've done a bit of good work on it already, obviously. Here again, assuming the motor has done 77k "untouched" up to this point in time, then yes....personally I would pull the pan and REPLACE all the bearings (and oil pump) as part of preventive ("downline") maintenance as seeing as the motor is already out of the car. I mean, what better opportunity? :) Your assessment of the oil pump location, etc. is correct, Doug. Easy job at this point and sure, I'd renew the front... MORE
David, I think someone else posted the speeds for the 4.22. As for acceleration, just take the % difference of 4.22 and 3.90 and figure that close to the same percent of an increase in acceleration will happen with the other diff. Perhaps like adding 20 more horse power, but at the sacrifice of the same percentage of top end speed. (Nothing for free in this world.) Assuming you like to participate in the "StopLight Grand Prix", go for the 4.22!!!!!!!! There is a diff ratio for autocross that comes from a Morris Minor pick up truck (if my... MORE
"How much oil...PCV valve" Well, it's been a long time since I've used one in my "ventilated" motors but as I recall from my '67 MGB, they look pretty much soaked in oil under the rubber diaphragm. Perhaps somebody else can confirm this for me or let us know differently. I gotta go back 30 years for this one! Anyway, if the idle comes up a goodly amount when you remove the oil filler cap, all is well PCV-valvewise, Jens. Cap'n. Bob '60 :{) PilotRob@... 33342... MORE
Fellas! I just have to tell you this, its probably old news to most of you but anyway. As you know i have been having problems lately (yet again), the symtoms were many and hard to make out. Well today the ba***rd fouled again and wouldnt run properly just like it was running on only 3 cyl. We are now 110% certain that its the petrol causing it. What happens is when the engine has reached normal temprature and i stop (with engine running) or drive very slowly the temp rise very fast (15-20F) and the engine starts fouling.... MORE
Jens... Dyno There ya' go!!! About time!!!! A dyno session(s) is part of a "tuned" engine rebuild. It's the last part, to be specific. The ignition advance curve (rate) is exactly opposite of what works in a mildly cammed stock engine, considering the cylinder filling characteristics (torque curve) of the "hairier" performance cam profile is "back to front" when compared to the stock cam. PCV valve Again, are you running the factory stock intake manifold mounted PCV valve fed from the can on the timing chain cover? If you are, and it is "new", it MAY be "NOS" or... MORE
Guys - I know this was discussed a while back, but what is the stock body height of a Midget? Was looking for the distance from the ground to the bottom of the rockers? or even better would be the distance from the bottom of the framerails to the bottom of the stock oil pan, that is if it sticks below the frame at all? I will probable lower the car slightly from stock but needed someplace to start from, don't want to scrub the pan off. My car is stripped to the tub and I'm trying to figuring... MORE
The oil going into the combustion chambers will also reduce the apparent octane of the petrol which won't help matters. David "David Jacobs" 33280... MORE
Stop mucking around and go to a dyno, before you do a head gasket or worse. beckers "beckers" 33268... MORE
Jens... Timing..... I am an adult. So talk specifics to me. How "overadvanced" was the total timing from 30 degrees? Give me numbers. PCV valve.... Assuming you are running a stock intake manifold mounted PCV valve with a rubber diaphragm (and it's compatible "filtered" plastic oil filler cap), excessive oil burning would be the product of the rubber diaphragm which has become "porous". They can "look good" even when they're worn out. Replace same and you're done with this. :):) Cap'n. Bob '60 :{) PilotRob@... 33278... MORE
Jens....STOP!!! Your chasing yourself in circles here. The variation in cooling temps with the mixture variations, along with appearance of the plugs and most of all, detonation/ pre-ignition (with octane changes thrown in for good measure) suggest the engine is operating on the borderline of self- destruction, in short time. Saving pennies on octane is extremely penny-wise, pound foolish. With a tuned unit utilizing high rpm's a good part of the time, "economzing" on octane can shortly become extremely expensive. Your "tuned" engine is an investment. Feed it a proper and appropriate "nutritional" diet. :):) May I suggest..... ...firstly,... MORE
Jens... What color are the plugs after you pull them out after a hard run? They should be chocolate brown (insulators) with the shell tinged carbon (dry) black, assuming "correct" timing, mixture and cooling system in reasonably good shape, etc. And what compression ratio are you running, BTW? On what octane #? Cap'n. Bob '60 :{) PilotRob@... 33252... MORE
Brad 'veering off the true and righteous path'? I never set out to create a concours car, but I did set out to put my car back to as original condition as I could. Originality is important to me, not for concours reasons, but because I never had a chance to buy one of these cars new, and now's my chance to have an 'as new car, as the makers intended it to be'. Having slightly polished Carb dashpot tops does not detract from that goal, even though they were not like that in new cars, it doesn't stop... MORE
Guys.... As most of us know, Peter C. does excellent lever shock rebuilds. Ron Soave of the spridget autox list is collecting names of people who would be interested in purchasing "variable", externally adjustable valves for lever shocks, which would enable owners to adjust the firmness of ride (both ways) to their individual needs or tastes. The valves would run approx. US$70 to $80 per valve, considering these would be of a limited production run. Hopefully, the would be producer (Peter C.) could lower costs through more orders for the initial run by making inquiries to all the other... MORE
Nigel, I don't remember what your car is, But FWIW... I had a similar problem with my Bugeye, My car came disassembled and the fuel tank fiting was not included. By trial and leak, I found that (USA terms) a standard tubing thread, copper compression fitting works. V.B. says that the same fits 65-74, and that the same pipe nut also fits 75-79, so I would assume that this should work in your car. I used copper tubbing from gas tank to carbs, (1 1/2" :() ), which is not stock, but is easier to bend and doesn't rust.... MORE
Hi guys I'm just getting ready to put the fuel tank back on and on inspecting the fuel feed pipe that goes into the tank itself, I noticed it was pretty corroded and on inspection (er read bending) it broke! No big deal I suspected it was corroded beyond service I just wanted it confirmed! The pipe nut on the end look to be pretty serviceable as does the nipple/flare on the end of the pipe. Question - how is that nipple/flare attached to the pipe? Is it brazed on? glued? compression fitting? Can I reuse it or do... MORE
Don, You can lower the front buy installing non RB front springs and if that dosen't lower it enough put in spacers between the spring pan and the A-arm. Spacers can be made from some thick (1/4") wall pipe/tubing and longer mounting bolts. Cutting down the front springs would be my last resort. For the rear a spacer block between the axle and spring. The spacer would be a block the width of the spring with a locating stud on it's top to fit the upper spring plate and a hole in the bottom to clear/locate it on the... MORE
What would low profile tires do? 70's or more? Bill French Hilton Head frenchww@... 33093... MORE
Hi everyone This is a question for anyone with a desmoged late model 1500 engined Midget. As I have kept with original on my '79 1500 I am in need of what is called the Air injection tube for this emissions system. It is a aprox. 1/2" metal tube that runs from the air pump check valve around the back of the cylinder head and screws into the exhaust manifold. It has a large fitting at the manifold and where it fits into the check valve. It is NOT the air rail type tube with the 4 branches to... MORE
Ken the casting numbers are from a midget (1972-3 at least) or similar (Austin 1100 ) They were the numbers on all 4 calipers I aqua blasted last week ready for re-plating and rebuilding. The Hoses fit using a forked bracket under the tab , which positions the hose. The hose in turn is attached to the caliper via a banjo bolt and at two copper washers. I remember two of these banjos having a head thickness of about 1/2" and two of 1/4" . Now I can't remember if they came off as a pair or if one... MORE
Non-engagement is the issue here, Mike. We were able to get some compression after we replaced the Master Cylinder, but not really enough to make the clutch work properly. It looks like we're going to try a new slave cylinder next...hopefully this will work. Ahhhh well...it looks like it's going to rain anyway:( (sigh) Lisanne:) "mckenzienewfs" 32935... MORE
Lisanne, Are you saying that the clutch will not disengage due to lack of hydraulic force/pressure or that it is permenatly disengaged. Duncan HHHhhhhh! Non-engagement is the issue here, Mike. We were able to get some compression after we replaced the Master Cylinder, but not really enough to make the clutch work properly. It looks like we're going to try a new slave cylinder next...hopefully this will work. Ahhhh well...it looks like it's going to rain anyway:( (sigh) Lisanne:) "Duncan Sinclair" 32937... MORE
Yeah... But "little pills" do nothing to stoke real interest. So....back to the weird sexual gymnastics and general overactivity in this respect (which is much more interesting:). Also, notice the great "Toy" has not yet responded to the above, possibly indicating we've hit the nail on the head as to "cause" of his alleged ills, which have no doubt been cast upon him by the great Allah, himself. May the fleas from a thousand camels infest his crotch!! :):) Cap'n. Bob '60 :{) PilotRob@... 32917... MORE
