Hi great help , but not very promessing on the causes ...
so i began with the obvious and most optimistic , fixing the leak in one of the idf's , aldo ive replaced the old red diafragm (doest that mean its probably in there for over 20 jears ?) bye the newer black ones. However i've been told that these old red ones weren't that resitand to todays fuell they still looked fine , what didn't chear me up becouse that means it will still have a leak when i place them back
The fuel leaks on the starter and stuff fom underneath the accelerator pump , its dripping fast when stationairy running or on halt , when the car accelarates it doesn't , so any ideas where the leak can be ?
On the other side this wont resolve the knocking sound , i get back on that later
Anyhow it wasnt a bad idea to get the manifold and carbs off , seemed like the gasket was all worn out , in fact there wasnt many left of it Could be the couse of my untracable small waterleak , new one is ordered
there were no gaskets between , the carbs and the manifold either , i did order a whole revision set , so i'll replace these on the fly (i tought)
one of the prev owners used a kind of glue (liquit gasket ?) so everything was hold tight
Getting it of is probably harder than getting it on , wile @it i can clean them (outside that is , if i pull them appart i probably need an ad on pieces soon or worse on a whole new set ...)
To get back on the knocking sound
when a while ago she ran perfecly , after 140 m/h race on the highway something blew? (dindt hear it do , just assume) when i drove her back home , i guessed the oil return gasket in the distributor , becouse the leaking oil on the exhoust gave that much smoke that i tought she would go up in flames ! , that oil dripped from under the delco cap ..
not having a oilpressure meter i cant really tell if the pressure is any good
Replacing that will probably dont resolve the rather ratling (then nocking) sound
So what else went wrong ? the contactpoints i've replaced and tuned fine while i was on evening course (oldtimer basics) where melt away, or at least the plastic thing that go's on the nok of the distributor. Done that before , so i've replaced them again , got a new selenoid (is that correct?) and greased the nok a bit. Not having a dwell , strobelamp or tach ( bye the way i'll post a wanted for those in another post) i only did it using those thin blades. i wonder how bad she is tuned
might be cousing the bad rpm
SO I'v got the 3 main ingridients for bad tuning : fuel , ignition and a misterious rattle
the low rpm i get can be of a bad ignition in combination with the bad fuell suply , but what i cant explain is why i only get to 4000 rpm when the tranny is in neutral , but when drive only goes up to 3000rpm and on that rpm the rattling begins (even when in neutral) @ least it isnt a tranny problem (i should guess)
why cant it be be just one thing that goes wrong on the same time ?
i really hope it resolves itself (o my god even for me that sound extremely optimistic) but it probably wont , so i've started noting some numbers becouse my motor seams to be a self built engine , compiled out as much as possible pieces on different cars
when the ignition is setted corectly (dwell , tach, strobelight)
and the webers back on (hopefully without leaking)
i can start to fix the oil seal from the distributor
when done all those i'll report back here and keep you all notified ,if the misterious sounds still excist , then we go from there
dont just cross your fingers , cross everything you have ....
Like a heavy knock like a bad bearing? or a pinging like detonation? A rattle like a bad valve? Does this happen (the rev's only going to 3000) when the tranny is in neutral as well? Is it worse under load? All RPM's? How is it running ? Do you have a oil pressure guage? If so how's the pressure? Take a long extention or screwdriver and start the motor then put it to your ear like a stethoscope, that way you can hear what's happening very clearly, you might be able to tell what part of the motor is making the sound by checking all around, for example valves, intake or exaust, or down lower in the motor. Check accesories as well alt, air pump, etc.. Sorry but there are many possibilities with a "knocking in the motor but few of them are good news.. and hard to diagnose without being there that's why we have this wonderful site eh??