Re: hydraulic lifters not pumping up
[Re: 68GTS383]
#1937721
10/24/15 12:51 PM
10/24/15 12:51 PM
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Joined: Nov 2003
Posts: 305 st. Louis Mo.
dartphil
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No mention whether the engine has a recent rebuild or if had been vatted. Before pulling engine remove the oil sending unit and take a straight piece of coat hanger or welding wire and stick in the hole that the sending unit came out of.About 4 inches down in the hole 340s have a small plug about 5/16s in diameter that looks like a small freeze plug which diverts oil to the top of the engine. Sometimes when vatted this plug comes out and the result is poor oil pressure. If the wire goes 6 to 8 inches down the hole then that plug is missing. Easy to check before pulling engine and can be installed from the top.Hope this helps! I just did the wire hing and there is no plug. I took ,y light also and looked down the hole there is nothing there.
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1937724
10/24/15 01:00 PM
10/24/15 01:00 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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If I may respectfully disagree, if that internal plug is missing the oil psi will be the same or even a bit higher (cuz the oil has a straight shot vertical up from the #5 cap to where it turns into the horizontle gallery & it ain't held back by the filter restriction) however the oil will be unfiltered (very bad deal) & if that ain't caught early on the eng will have an earlier(er) demise years on down the line while all the time the owner is thinking he is doing the right thing/being proactive with frequent oil/filter changes. We gotta find out what passage etc (something) that is being partly uncovered etc when it is running that ain't opened when bench testing with the primer. I'm thinking it is lifter related.
live every 24 hour block of time like it's your last day on earth
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1937746
10/24/15 01:45 PM
10/24/15 01:45 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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I'm thinking the height of the side oil hole/gallery height interface especially if lifter to wall clearance is healthy. I'm just thinking out loud but we are losing alot of PSI & not thinking that the crank/bearing clearances would be altered significantly from running/not running esp if you are running full groove mains (but I ain't sure on this/just speculating) but with FG mains I'd think the passages (saddles to crank innards) would be open all the time.
live every 24 hour block of time like it's your last day on earth
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1937872
10/24/15 06:59 PM
10/24/15 06:59 PM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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The lifter on the one we were working on did bleed down when the pressure got low, replaced it a couple times and no difference.
Cab is right, fix what you know is wrong and go from there.
FYI full groove bearings do tend to cost a few PSI.
The ratio between crank and distributor is 2 to 1 so if your drill turns 500 RPM it is like the engine turning 1000 RPM. Also the cam lube may or may ont be getting through depending on where the cam is stopped when drill priming.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1937921
10/24/15 08:15 PM
10/24/15 08:15 PM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
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Posts: 12,424
Kalispell Mt.
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They only have a hole through them if you put a hole in it. I usually do it on the top passenger side bolt to drain the little puddle onto the chain, gives more chain lube and aids drainback time.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: hydraulic lifters not pumping up
[Re: HotRodDave]
#1937995
10/24/15 10:44 PM
10/24/15 10:44 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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Some OE had a 1/8" hole in the top pass bolt and some had the angled drip tray & a guy said some had both. It is a drip oiling and I drilled a good sized hole in the retainer flat plate and a .015" hole behind that in the front pass mini cup plug in the front of the horizontle gallery for a constant squirt onto the chain and the same .015" hole in the rear 3/8 NPT pipe plug in the drivers rear of the horizontle oil gallery for a constant squirt onto the intergear (when you preoil you can see its function). Get an aluminum pipe plug & drill it REAL slow especially on steel ones like the cup plug & buy several of the .015" bits as you will likely break one especially on the steel front cup plug.
live every 24 hour block of time like it's your last day on earth
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Re: hydraulic lifters not pumping up
[Re: 68GTS383]
#1938250
10/25/15 12:26 PM
10/25/15 12:26 PM
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Joined: Nov 2003
Posts: 305 st. Louis Mo.
dartphil
OP
enthusiast
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OP
enthusiast
Joined: Nov 2003
Posts: 305
st. Louis Mo.
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No mention whether the engine has a recent rebuild or if had been vatted. Before pulling engine remove the oil sending unit and take a straight piece of coat hanger or welding wire and stick in the hole that the sending unit came out of.About 4 inches down in the hole 340s have a small plug about 5/16s in diameter that looks like a small freeze plug which diverts oil to the top of the engine. Sometimes when vatted this plug comes out and the result is poor oil pressure. If the wire goes 6 to 8 inches down the hole then that plug is missing. Easy to check before pulling engine and can be installed from the top.Hope this helps! What would they call this plug at the parts store? I sure want to put it back in while im working on this thing.
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1938259
10/25/15 12:46 PM
10/25/15 12:46 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Ma has it & a parts store would also & likely called a cup plug. its a small one & you need the exact size. You drive it in up thru the #5 main cap block saddle
live every 24 hour block of time like it's your last day on earth
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Re: hydraulic lifters not pumping up
[Re: CUDABUD]
#1938481
10/25/15 08:02 PM
10/25/15 08:02 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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My 340 rattled when they didn't install that plug but also missed the threaded plug in the galley by the distributor! That normally ends up with a motor having no oil pressure, epsecially when trying to prime it with a drill motor, don't ask me how I know that now There be two galley plugs on Mopar SB motors on the drivers side at the rear of the block, the large one one is for access to the smaller one inside in front of the distributor and that one is essential to seal the oil galley passages up on that side
Last edited by Cab_Burge; 10/25/15 08:03 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: hydraulic lifters not pumping up
[Re: bigcar]
#1938604
10/25/15 10:39 PM
10/25/15 10:39 PM
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Joined: Nov 2003
Posts: 305 st. Louis Mo.
dartphil
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OP
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Posts: 305
st. Louis Mo.
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So if I understand this thread correctly, this "cap" cannot be installed from the top of the engine! It must be installed from the bottom? I am having the same problem, on a 340. No one has been able to figure out why the lifters rattle. Ok now we are confused. 68 gts said you can put this plug in from the top. Who is correct?
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1939827
10/27/15 07:47 PM
10/27/15 07:47 PM
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Joined: Nov 2003
Posts: 305 st. Louis Mo.
dartphil
OP
enthusiast
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OP
enthusiast
Joined: Nov 2003
Posts: 305
st. Louis Mo.
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So if I understand this thread correctly, this "cap" cannot be installed from the top of the engine! It must be installed from the bottom? I am having the same problem, on a 340. No one has been able to figure out why the lifters rattle. Ok now we are confused. 68 gts said you can put this plug in from the top. Who is correct?
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Re: hydraulic lifters not pumping up
[Re: dartphil]
#1940036
10/28/15 12:33 AM
10/28/15 12:33 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Posts: 36,041
Lincoln Nebraska
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installing vertical oil gallery plug. bottom saddle hole ID .570". top threaded NPT sender hole .336" (& NPT threads get narrow(er) further down).
live every 24 hour block of time like it's your last day on earth
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