Oil pressure on my 318 *sigh*
#2204634
11/29/16 07:05 PM
11/29/16 07:05 PM
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Joined: Sep 2003
Posts: 4,108 Glen Burnie MD
68SportFury
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Glen Burnie MD
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Well, I finally put a gauge on the ragtop so I could see what the oil pressure actually was, before putting a new sender on it. 30psi cold, but warm...? Higher is idling in Park, lower is idling in gear. Crap.
Paul 68 Sport Fury ragtop 67 Fury III 4-dr HT 11 Charger Rallye 17 Challenger SXT Plus
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2204636
11/29/16 07:08 PM
11/29/16 07:08 PM
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Joined: Sep 2003
Posts: 4,108 Glen Burnie MD
68SportFury
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As soon as I posted this, I remembered I was attaching files straight from my phone's 8MP camera. Sorry about that. Will fix later.
Last edited by 68SportFury; 11/29/16 07:08 PM.
Paul 68 Sport Fury ragtop 67 Fury III 4-dr HT 11 Charger Rallye 17 Challenger SXT Plus
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Re: Oil pressure on my 318 *sigh*
[Re: killermopar]
#2204694
11/29/16 08:40 PM
11/29/16 08:40 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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I looked closer & saw the nylon tubing so that is a mech gauge. As you know it can't be driven with it that low. I would pull the dist & intergear & drill prime it & see what develops. Was the PSI OK before? any changes made that might be bringing this on? with the dist out you can see if the rear gallery plug is in place. holler back with any news
live every 24 hour block of time like it's your last day on earth
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Re: Oil pressure on my 318 *sigh*
[Re: RapidRobert]
#2204817
11/29/16 11:35 PM
11/29/16 11:35 PM
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Joined: Jun 2005
Posts: 5,112 Western Md.
skicker
"The Champ"
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"The Champ"
Joined: Jun 2005
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Western Md.
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I had an old 318 in my 4x4 that was like that...Run a good thick oil (Brad Penn Straight 40 or 50) and it should be fine. Back in September I put 1 qt. of cheap oil in the 383 in the Satellite and it lost about 8 lbs of oil pressure...
...FAFO...
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2204918
11/30/16 01:08 AM
11/30/16 01:08 AM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
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Colleyville
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I would start by pulling the pan and checking the oil pickup for debris blocking the pickup, like timing gear dross. 2ยข
Robert
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205170
11/30/16 12:31 PM
11/30/16 12:31 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
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Cincinnati, Ohio
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If it ain't broke don't fix it! If it runs fine then keep driving it, IMO. I had a 1981 international crane truck with a 304 V8 gas engine in it that I bought used for the crane on the back. It would show 0 oil pressure at idle warm and would go up to 25 or so when revved up. We used that truck like that for more than 15 years. I figured eventually I would have to overhaul the engine, never had to and then I sold it still running. That truck sat there and idled most of the time while the crane was being used. My I ran 15W-40 diesel oil in it the whole time.
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205187
11/30/16 01:15 PM
11/30/16 01:15 PM
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Joined: Jan 2003
Posts: 21,080 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,080
Niles , Ohio
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I agree if it goes up driving drive it.A new pump might increase pressure some.My old Ramcharger had the same thing.Bought it with like 160K on it and sold it with 280k.Still ran great and OP was almost always on 0 hot in gear.Driving it would go up.Guy that bought it was driving it 2 years at least after I sold it.Rocky
Chrysler Firepower
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Re: Oil pressure on my 318 *sigh*
[Re: dan9]
#2205225
11/30/16 02:09 PM
11/30/16 02:09 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
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Everyone tells you it's OK. Maybe they're all right, maybe my experience was the exception. But I had something like that happen and it wasn't OK. The way the 318 oils is, the #1 main feeds the #1 rod journal, and the #1 main is the last in line for oil. I had replaced my old engine with a newer one with new bearings and rings. Because the oil pan was different I reused the old pan and pump. After a few thousand miles it started making noise driving around town and the oil light was on anytime the engine was at idle.
Disassembly showed the #1 main and the #1 rod journal with damage, everything else was fine. The main bearing was pretty much gone, but the main journal itself was OK. The rod bearing was down to the steel, the rod was blued and the rod journal was worn deeply, only on the half of the journal corresponding to the #1 rod. About 1/8" was worn off the underside of the throw. I had to replace the crank and one rod, plus all the bearings.
So I say get another 318 shortblock and swap it in. Or rebuild the one you have and put in a new pump and pickup tube. If you let it go long enough it'll get a lot worse.
R.
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205295
11/30/16 04:14 PM
11/30/16 04:14 PM
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Joined: Jan 2003
Posts: 75,071 U.S.S.A.
JohnRR
I Win
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How much does the RPM drop when you put it in gear ?
Was the idiot light coming on when idling in gear and warm ?
What's your plans with the engine/car? Do you use it as a summer car only ?
running up my post count some more .
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205323
11/30/16 04:51 PM
11/30/16 04:51 PM
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Joined: Sep 2003
Posts: 4,108 Glen Burnie MD
68SportFury
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The car has over 204,000 miles on it.
Oil pump was replaced in early 1997 and has about 25,000 miles on it. The guys who did it would have cleaned the pickup before buttoning it back up. The idiot light would come on when idling in gear and warm after sustained highway driving. When I took it to Mason-Dixon for the Mopar Meet in May, it started coming on sooner (it would come on within a mile of my house, after being driven under 40mph) and staying on longer (sometimes even after putting it in Park). I haven't driven it farther than the local cruise night (2 miles from my house) since, because I'd rather not have the engine go when I'm 50 miles from home.
I don't know how much the RPM drops when it goes in gear (no tach).
People suggesting heavier oil: Do you really think I'm gonna pick up 15 psi just with thicker oil and a new filter?
It's a convertible with Dynomaxes, so it's hard to tell if there are new noises. The engine doesn't sound different when I'm just standing there with the hood open.
The car is a toy, but one that I usually drive about 1000 miles a year. This year, I basically lost the whole cruise/show season because of the oil light. Yep, no top-down cruising all summer.
I looked at small-blocks for sale in the classifieds yesterday, but the two that looked promising were too far away.
Paul 68 Sport Fury ragtop 67 Fury III 4-dr HT 11 Charger Rallye 17 Challenger SXT Plus
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205325
11/30/16 04:52 PM
11/30/16 04:52 PM
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Joined: Sep 2003
Posts: 4,108 Glen Burnie MD
68SportFury
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Oh, yeah, I didn't actually drive it anywhere yesterday, I just ran it in the driveway and tached it up a little to see if the pressure went up at higher revs.
Paul 68 Sport Fury ragtop 67 Fury III 4-dr HT 11 Charger Rallye 17 Challenger SXT Plus
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205327
11/30/16 04:54 PM
11/30/16 04:54 PM
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Joined: Jan 2003
Posts: 75,071 U.S.S.A.
JohnRR
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Drop the pan and look at a few bearings ? If there is no metal to metal contact I would put new bearings in it and button it back up ... maybe get a set that are .001 oversize to tighten up the clearance?
Thicker oil is not the way to go about fixing it.
running up my post count some more .
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205412
11/30/16 07:26 PM
11/30/16 07:26 PM
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Joined: Jul 2011
Posts: 960 Chicago
PurpleBeeper
super stock
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super stock
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Chicago
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There is a lot of good advice here. I suggest you run the thicker oil (maybe even straight 40W or 50W)....while you're finding and/or building another small block. You can get a used 318 pretty cheap or find a 340/360 & build it a little if you have more cash. I would guess you'd gain about 10psi of oil pressure with 40W or 50W oil.
70 Roadrunner convt. street car
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'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Oil pressure on my 318 *sigh*
[Re: 68SportFury]
#2205464
11/30/16 08:58 PM
11/30/16 08:58 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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Nothing is going to magically fix it short of hard parts replacements.
I suppose the bypass in the oil pump could be stick open causing this issue.
You could pull the pan and inspect the bypass as well as the bearings. that will tell you more than all our guesses combined.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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