Author Topic: Engine lubrication advice please...  (Read 395 times)

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Offline casperdog

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Engine lubrication advice please...
« on: November 06, 2018, 01:37:30 pm »
Hi..Need some advice please... on the best way to make sure i've got oil to critical parts of the engine while i'm turning it over manually.
Just bought a Cb750k5 for restoration. Cleaned carbs (what a job that was..!), oil and filter, look inside bores with scope, new plugs, new battery and ready for its first attempt at starting it.
No spark..or a VERY weak one...
So don't want to damage my engine while i'm trying to sort a spark.
The sump is now dry due to oil change.
I'm going to feed some to the cam through tappet covers...
Is it worth feeding some oil through the port next to points cover....where does this go? mains....big ends?
Any other places i can feed oil into the engine?
The motor does turn over freely but hasn't been run for a LONG time.
Any advice gratefully received...
Cheers
Phil


Offline flybox1

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Re: Engine lubrication advice please...
« Reply #1 on: November 06, 2018, 01:57:19 pm »
Thru the tappet covers is fine.
Turn it with the kick starter. 
Once it starts, the oil pressure light should go out in seconds.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline casperdog

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Re: Engine lubrication advice please...
« Reply #2 on: November 06, 2018, 02:09:35 pm »
Thru the tappet covers is fine.
Turn it with the kick starter. 
Once it starts, the oil pressure light should go out in seconds.

Hi....thanks for reply.
How much oil should i feed through the covers. Was just thinking of a few squirts from the oil can to keep the cam lubed.
Will it drain through to the sump from here? Is it worth pouring a couple of pints in here if so?
It may take me some time to get the sparking sorted so will be turned over quite a bit with the kickstart.
cheers
Phil
« Last Edit: November 06, 2018, 02:12:52 pm by casperdog »

Offline flybox1

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Re: Engine lubrication advice please...
« Reply #3 on: November 06, 2018, 02:35:04 pm »
you certainly dont want to go too far above the max refill volume.

Think 2Q in the oil tank, and the third Q throughout the top.
That'll keep it wet up top and pressurize the system faster.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline pjlogue

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Re: Engine lubrication advice please...
« Reply #4 on: November 06, 2018, 04:08:11 pm »
What Flybox1 said.  You can add 1/2 qt each to the left side and right rear tappet covers.  I would kick it over quite a bit before starting.  You need to fill the oil filter housing before oil gets pumped into the oil passages

-P.

Offline Don R

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Re: Engine lubrication advice please...
« Reply #5 on: November 06, 2018, 04:10:03 pm »
 I've added oil through the oil galley next to the points cover with good results. I've used an auto Air Conditioner oil cylinder to pressurize the engine oil system before starting. I've also just spun it over and it pumped right up.
If the things you own end up owning you, it's better to be owned by some cool things.

Offline krusty

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Re: Engine lubrication advice please...
« Reply #6 on: November 06, 2018, 08:14:12 pm »
A new set of plug caps may fix your weak spark if all else is, points condensers, coils etc are ok. On an old bike it would be prudent to change them anyway.
Honda
1976 CB750F1
1978 CB750F2
1972 CB350F
1961 C100 Cub
1962 C100 Cub
1959 C76
1963 C92
1964 C95
Suzuki
1963 M15D 50cc
1961 250TA Colleda
1961 250TA Colleda x 2 primed ready for paint and assembly
Yamaha
1977 DT175E x 2
1978 DT125E
1979 DT125F
1976 DT250E
1978 DT250G
1984 FJ1100
1990 FJ1200

Offline johans

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Re: Engine lubrication advice please...
« Reply #7 on: November 07, 2018, 11:30:25 am »
plugs out also while getting pressure up , it's also a very good idea to burp the oil pump . remove the pump and immerse it in oil and spin it until the air bubbles stop. While the pump is out get this kit , well worth it .

https://www.ebay.com/itm/Honda-CB750-oil-pump-rebuild-kit-SOHC-oring-stopper-seal/162442240391?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649


ps - don't expect any positive feedback from the seller.Very odd
« Last Edit: November 07, 2018, 11:45:28 am by johans »

Offline strynboen

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Re: Engine lubrication advice please...
« Reply #8 on: November 07, 2018, 11:41:01 am »
i used a battery drill..to rotate the engine..vith sparkplugs aut..and primed in the oil pressure kontakt hole..but it are easyer job on a 550..vith vetsump
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords

Offline flatlander

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Re: Engine lubrication advice please...
« Reply #9 on: November 07, 2018, 11:45:12 am »
what oil do you guys recommend for this purpose?
  ;D

Offline johans

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Re: Engine lubrication advice please...
« Reply #10 on: November 07, 2018, 11:46:18 am »
i use valvoline 10-40 ( non synthetic )

Offline flatlander

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Re: Engine lubrication advice please...
« Reply #11 on: November 07, 2018, 11:48:01 am »
  :-X

Offline casperdog

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Re: Engine lubrication advice please...
« Reply #12 on: November 07, 2018, 01:25:24 pm »
Hi, thanks for all the advice, its much appreciated.
Based on all the info given I think i've decided what i'm going to do.
Drain the (new) oil from the tank / sump and leave the sump plug out.
Feed the oil through all the tappet covers and side port and allow to drain from sump.
Hopefully this will bathe as much of the internals as possible with clean oil. And act as a flush.
Then fit the sump plug and re-fill as suggested with a couple of pints through the top to drain into the sump.
Does this sound like a good plan?....All your advice is greatly received by a relative amateur!
As per original post, the main reason i asked for advice is to prevent damage to internals while i'm kicking over the engine while testing for a spark..but i suppose its all good practice for first start up anyway.
Thanks for all your replies
Phil


Offline flybox1

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Re: Engine lubrication advice please...
« Reply #13 on: November 07, 2018, 02:03:39 pm »
1Q up top
1Q in the sump plug
1Q in the bag

....what is keeping you from just starting it?  :-\
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline casperdog

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Re: Engine lubrication advice please...
« Reply #14 on: November 07, 2018, 02:45:36 pm »
1Q up top
1Q in the sump plug
1Q in the bag

....what is keeping you from just starting it?  :-\

Hi Flybox....
Its not sparking.....i did mention that  ;)
Cheers
Phil

Offline flybox1

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Re: Engine lubrication advice please...
« Reply #15 on: November 07, 2018, 04:46:18 pm »
yeah, i got that   ;D  but, you should be over here... 
http://www.hondachopper.com/garage/troubleshooting_charging_system/troubleshooting_charging_system.pdf
its a good way to work thru the electrical system...which will identify things that may be your cause.

post your results when done.

Plug caps should be tested as well.  Anything over 7kohms should be replaced.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline casperdog

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Re: Engine lubrication advice please...
« Reply #16 on: November 11, 2018, 08:29:26 am »
Hi, thanks for all the input.
Managed to get a spark... (Cleaned up points faces and set with proper gap, and new plug caps)
Re-filled with half the oil through tappet covers and half in the tank.
Turned over with kill switch on and oil light went out after a couple of seconds. Then fired up straight away with kill switch off.....Happy days. I've only run it at tickover so far but sounds good with no obvious nasty noises.

One last question on this subject please...
Whats the best way to visually check for good oil flow?
What sort of oil flow should i see through tappet covers and in the tank?
I removed a couple of covers and i could see oil moving there but would have expected it to spew out... any thoughts?
Going to get a gauge i think..
Cheers
Phil



Offline flybox1

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Re: Engine lubrication advice please...
« Reply #17 on: November 12, 2018, 06:43:02 am »
thru the tappet holes you wont see much 'flow' but you should see a fair amount of oil being tossed around.
if you look in the tank, you should see a slow roll of oil..
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline casperdog

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Re: Engine lubrication advice please...
« Reply #18 on: November 12, 2018, 11:55:03 am »
Ok....thanks for all the advice
Phil

 

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