Posted By: Greencospeedshop
Oiling holes line up...where??? on 273 trying to prime - 02/01/09 05:37 AM
Trying to get oil up to the rockers....I have it everywhere else.
I tried all 4 quardants.......tdc,90,bdc,90...
nothing ... I even tried straight up and down in relation to the crank centerline.... and at a 90 to it as well....
I have done this before and sucessfully....can't seem to strike oil now though....
Nothing on it in the 1969 or 1970 Chassis service manual... I know someone out there knows this....
Thanks.
GCSS
Posted By: dart4forte
Re: Oiling holes line up...where??? on 273 trying to prime - 02/01/09 06:26 AM
Are you running Magnum heads?
Posted By: Dodgem
Re: Oiling holes line up...where??? on 273 trying to pr - 02/01/09 01:08 PM
Before my SR heads that oil through external lines I would spin the motor over with a kicker button clipped on to the start relay as I run the drill clockwise SB and counter clockwise. That seems to be the ticket
Posted By: Dodgem
Re: Oiling holes line up...where??? on 273 trying to pr - 02/01/09 01:12 PM
Turning with the starter as you prime also gets the lifters pumped up better on a hydraulic cam as then they all get a turn at pressure at a low preload station
Posted By: MoparforLife
Re: Oiling holes line up...where??? on 273 trying to pr - 02/01/09 01:24 PM
Also make sure to have the notches on the end of the rocker shafts down and to the front on the drivers side and down and to the rear on the Rt. (passenger) side of the engine. If they are not installed correctly oil will not be supplied to the top of the engine. Also the top of the engine is oiled alternately according to camshaft rotation with one side getting oil at a time depending of camshaft position to the oil feed to the head.
Posted By: RapidRobert
Re: Oiling holes line up...where??? on 273 trying to pr - 02/01/09 04:27 PM
I'd grab a helper & have him turn the crank slowly w a breaker bar(take plugs out) while you man the drill(CW)
Posted By: Greencospeedshop
Re: Oiling holes line up...where??? on 273 trying to prime - 02/02/09 09:54 PM
I am using stock 273 heads.
I turned the crank quite a bit and no oil. I do have the rocker shafts correctly located.
I will have an assistant turn the motor over slowly while I run the drill.
I am doing all this BEFORE I install it.
I am asking if anyone knows at exactly what point (degree) do the oiling holes line up ??
If I don't get oil, I will pull the cam out to check and be sure the oil holes are exposed.
Thanks.
GCSS
Posted By: Snoopy
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 12:03 AM
I don't know if these photos will help. This is from a 426 Hemi.
The red lines represent the oil flow through the cam journal.
Posted By: Snoopy
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 12:11 AM
This is a picture of the cam bearing from the bottom of the block. The oil supply holes leading to the heads are shown.
Posted By: Snoopy
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 12:20 AM
Passenger side head oil flow.
Posted By: Snoopy
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 12:20 AM
Driver side head oil flow.
Posted By: Anonymous
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 12:28 AM
You don't need all this about the degrees. If you can't get oil by spinning the pump and either wrenching or cranking the engine with the starter, you have a problem. Either you have something basically wrong in the pump path--plugged passage, etc, a missing plug, etc
Posted By: RapidRobert
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 04:33 AM
What about your other cam bearing? On a SB the #2 & the #4 cam bearings have 2 holes to direct oil topside rather than just (1) cam bearing for BB's. If your other one is dead on like the one in the pic(I would think it is since that one is good), & you have checked your rocker shaft alignment & if your turning the crank slowly by hand(& I'm thinking you are) that pretty much leaves a problem with the head gaskets blocking the(2) holes on each bank.
Posted By: dart4forte
Re: Oiling holes line up...where??? on 273 trying to prime - 02/03/09 04:52 PM
Is the engine on a stand or in the car? did you check the plugs in the back of the block?
Posted By: Greencospeedshop
Re: Oiling holes line up...where??? on 273 trying to prime - 02/04/09 06:05 AM
engine is on the stand...
What plugs??
I am out of town right now and can't do anything till Saturday..
I will have an assistant help and also look at the plugs.....But are you talking about the ones that are behind the frost plugs???
Posted By: RapidRobert
Re: Oiling holes line up...where??? on 273 trying to prime - 02/04/09 06:38 AM
you might take off the drivers rocker arm assy & see if you can blow some air in the passage & see if it's coming out at the #2 cam journal, (if so) take the passenger rocker arm assy off & see if its clear to the #4 cam journal. If both are open you wont have to R&R the heads. (If not) your only out a pair of head gaskets