View Full Version : Stupid question time
GQ snail
26th July 2012, 08:11 PM
So in conversations with the cylinder head blokes, owner of mechanics and floor manager at mechanics in regards to my cylinder head, we have spoken about "Tappets" "Buckets" and "Lifters"
My question is : are these all the same thing? Or are they different components.
Cheers.
Outrage
26th July 2012, 08:28 PM
So far have heard them called simply valves (from engine course at uni), one mechanic called them tappets (in his 40's or 50's), another called them lifters (in his 30's). Buckets is new to me. So far to me it seems to be put down to what they were taught.
Brother has a similar issue at his work being in a wreckers, they know a part under one name, customer comes asking for the same thing but calls it something else, no idea what the customer actually wants without some discussion.
Not 100% on this so if someone actually 'knows' for certain would be great.
the ferret
26th July 2012, 08:31 PM
So in conversations with the cylinder head blokes, owner of mechanics and floor manager at mechanics in regards to my cylinder head, we have spoken about "Tappets" "Buckets" and "Lifters"
My question is : are these all the same thing? Or are they different components.
Cheers.
Not such a stupid question mate, you are asking because you don't know, now you will know.
Generally The tappet is the name given to the clearance between the top of the valve in the head "noisy tappets" and the underside of the rocker arm.
Buckets, I can only asume they mean the seals on the valves inside the valve spring, these help to prevent blow by from the cylinder.
Lifters are the things that follow the lumps on the camshaft and in turn, raise and lower the inlet and exhaust valves to coincide with the compression,combustion, exhaust and intake cycles of a 4 stroke engine, be it petrol or diesel.
Hope this helps you to understand what they are rabbiting on about, just say ""MMMMM" and nod from time to time.
Cheers, the ferret.
97_gq_lwb
26th July 2012, 09:08 PM
Actually i had a mitsubishi express van years ago unfortunately.
Anyway i had the head fully recoed fitted it up and had lifters not pumping up i was stumped turned out the morons that recoed the head put the rocker assembly back together the wrong way.
What happened was the oil gallery supply for one side was upside down or the wrong way round and it was an absolute pain to find you may have something similar.
worth looking at anyway.
GQ snail
26th July 2012, 09:29 PM
Cheers ferret, that has cleared it all up.
the ferret
26th July 2012, 09:37 PM
Cheers ferret, that has cleared it all up.
Cheers mate, it's only a basic description, It might not be specific to your engine, but the design of the internal combustion engine hasn't changed much in a hundred years.
The 1927 Ford A had tappets, cam followers (lifters) and valves, even tho they were in the engine block and not in the head.
Cheers, the ferret.
Dingo55
26th July 2012, 10:06 PM
Not such a stupid question mate, you are asking because you don't know, now you will know.
Generally The tappet is the name given to the clearance between the top of the valve in the head "noisy tappets" and the underside of the rocker arm.
Buckets, I can only asume they mean the seals on the valves inside the valve spring, these help to prevent blow by from the cylinder.
Lifters are the things that follow the lumps on the camshaft and in turn, raise and lower the inlet and exhaust valves to coincide with the compression,combustion, exhaust and intake cycles of a 4 stroke engine, be it petrol or diesel.
Hope this helps you to understand what they are rabbiting on about, just say ""MMMMM" and nod from time to time.
Cheers, the ferret.
Ferret, I know you have a black belt, 10th dan in Mechology & that you're a Supreme Grand High Master in the Secret Society of Patrolology but your off the mark on what a bucket is. Buckets are those things in the corner of every mechanical shop. After the mech has finished fixing your donk & torques down the last bolt, any spare engine parts left over go in the bucket!
cheers,
PS Has that pretty french nurse managed to escape ferret castle, or you still got her locked up in the tower?
the ferret
26th July 2012, 10:15 PM
Ferret, I know you have a black belt, 10th dan in Mechology & that you're a Supreme Grand High Master in the Secret Society of Patrolology but your off the mark on what a bucket is. Buckets are those things in the corner of every mechanical shop. After the mech has finished fixing your donk & torques down the last bolt, any spare engine parts left over go in the bucket!
cheers,
PS Has that pretty french nurse managed to escape ferret castle, or you still got her locked up in the tower?
Well, tie my face ta th side of a pig and rooooolll me in the mud.
Ya learn every day, thanks Dingo.
If you send me your email addy, I have a nice pic of an easter bunny, the nurse escaped.
Cheers, the ferret.
nissannewby
26th July 2012, 11:00 PM
A bucket is another type of adjusting setup for your valves instead of having a locknut and adjustable grub screw they have what is call a bucket and shim. The bucket sit over the valve (like an upside down bucket) and the shim sits up inside it when you do a valve adjustment you change the thickness of the shim to get the correct spec. Lifters are what the cam acts on to then push the push rods up and moving the rocker arm. Tappets are generally the bit that acts on top of the valve. They are all different items. Hope this helps
davo94
27th July 2012, 09:02 AM
Buckets are usually used on dohc installs where space is limited. You will find them on most late model 4 cylinders. oh my god its got v-tec bro.
MQ MAD
27th July 2012, 10:13 AM
Lifters , the bit that follows the cam profile to move the push rod to lift the rocker up and down to open and close the valve
Buckets thats the bit over the top of the valve that holds in the springs and valve
Tappets or rockers are the bits that lift up and down via the pushrod as the lifter moves up and down via the cam profile
Do a google surely there would be a pic or two of a conbustion 4 stroke engine
Overhead cam engines well there different again .....
the ferret
27th July 2012, 10:23 AM
Yep, and the older engines also have "collets" to retain the valve spring, the modern engine has changed a fair bit, but the basic idea is unchanged.
I'm hard to trick with the old pushrod engines, but I'm still learning about the modern OHC motors, this forum and others has been a great source of information.
YO, the internet..
Now the rotary engine is another story!!
Cheers, the ferret.
jack
27th July 2012, 12:33 PM
Reading this brings back memories. Was cleaning out my shed a couple of months ago and found a bottle of valve lap grinding past (still wet), the dowel with the rubber suction cup, home made valve spring compressor. Even the old MK1 Cortina service manual, well used and lots of finger grease. Still have the timing lights and other diagnostic equipment, just nothing to use them on. Those days are long gone.
We've come a long way, now I open the Patrol bonnet and go WOW what's that for.
Cheers
the ferret
27th July 2012, 12:37 PM
Ha ha, I open the bonnet, have a quick look and shut it again, if it aint got a dizzy and plugs, I don't go there lol
Cheers, the ferret.
taslucas
27th July 2012, 01:09 PM
Ha ha, I open the bonnet, have a quick look and shut it again, if it aint got a dizzy and plugs, I don't go there lol
Cheers, the ferret.
Haha. You open the bonnet and go "OUCH" when it lands on your finger lol.
I learnt the hard way what little I know by building (then rebuilding) and old Holden 202. A good engine to learn on as you can see how everything works and it's quite simple. Did all the stupid stuff like dizzy 180 out lol
Tap, crackle, pop
97_gq_lwb
27th July 2012, 01:14 PM
I was lucky started on bmw's audi's and porsches etc at a young age they were always 20 years ahead of the game and things haven't advanced that much since.
But diesels are a whole new world and quite simple in comparison gotta luv em.
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