Null


dbushey

  • Karma: +1/-0
455 olds engine low oil pressure
« on: August 22, 2014, 04:34:47 AM »
I just picked up a 1973 Wriedt with a 455 olds. The first time out the oil pressure dropped to 20psi after a couple laps at elsinore. The front and back intake manifold pan gaskets were leaking oil badly also. I have heard that this is typical for the 455 olds motors. What do you people think?
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

Handi-Crack

  • Karma: +3/-0
Re: 455 olds engine low oil pressure
« Reply #1 on: August 22, 2014, 06:18:50 AM »
Welcome to the Wriedt family I have a 75 Mavrick. Love the way it rides when it's running haha.

From what I've gone thru, been told and read you are going to want to et oil mods done ASAP.



I'm


  • Boat #1: 75 wriedt mavrick
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

MorePower

  • Karma: +20/-0
Re: 455 olds engine low oil pressure
« Reply #2 on: August 22, 2014, 08:18:49 AM »
Manifold gasket replacement is a simple straight shot... What does the oil pressure start off at? What oil are you running? What's your engine temp? Do you know what mods have been done internally? What size oil pan?

  • Boat #1: 1974 18ft Southwind
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

dbushey

  • Karma: +1/-0
Re: 455 olds engine low oil pressure
« Reply #3 on: August 22, 2014, 08:37:20 AM »
I don't know of any mods, oil pressure started at 45, oil pan looks like a stock pan but I don't really know except that it holds 5 quarts. I put 5-30wt
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

dbushey

  • Karma: +1/-0
Re: 455 olds engine low oil pressure
« Reply #4 on: August 22, 2014, 08:39:26 AM »
Oh and the engine temp was very low as the dude I bought it from had water strait from the pump with no gate valve so it was running 120 or less. I am in the process of re-plumbing the system.
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

MorePower

  • Karma: +20/-0
455 olds engine low oil pressure
« Reply #5 on: August 22, 2014, 08:53:03 AM »
Okay, def get a bigger pan. If you aren't sure of oil mods, it will help keep oil through the pump instead of running dry. When pressure starts to drop, what RPM are you at and for how long?


Sent with my Fingers
  • Boat #1: 1974 18ft Southwind
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

dbushey

  • Karma: +1/-0
Re: 455 olds engine low oil pressure
« Reply #6 on: August 22, 2014, 08:57:51 AM »
It started to drop after running at 4500rpm for 60sec or so, not very long.

My plan is to run it easy for the rest of this season and pull the motor this winter. Hoping that is!
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

BIG JOHNSON

  • Karma: +1/-0
Re: 455 olds engine low oil pressure
« Reply #7 on: August 22, 2014, 09:02:06 AM »
5w-30 is thin.
  • Boat #1: 1994 Ultra LX 21"
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

dbushey

  • Karma: +1/-0
Re: 455 olds engine low oil pressure
« Reply #8 on: August 22, 2014, 09:05:13 AM »
I have read that some use strait 40wt....
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

Bunger

  • Karma: +6/-0
Re: 455 olds engine low oil pressure
« Reply #9 on: August 22, 2014, 09:13:45 AM »
I run straight 50. First 30 seconds cold itll be around 75 psi then drop to around 60 after a minute then after 20 minutes cruising at 4000rpm it'll drop to 30. And thats with a 12qrt pan. Like morepower said get a bigger pan. And when you go through the motor make sure you do the restrictors and what not.


Sent from my iPhone using SoCalJetBoats
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

mobboss

  • Karma: +15/-0
Re: 455 olds engine low oil pressure
« Reply #10 on: August 22, 2014, 09:53:44 AM »
You should be running a straight weight oil. I run 40weight racing in might 455.


Sent from my iPhone using SoCalJetBoats
  • Boat #1: boat less
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

5150whiteboy

  • Karma: +24/-0
Re: 455 olds engine low oil pressure
« Reply #11 on: August 22, 2014, 09:56:11 AM »
Same here that seems like thin oil I'd swap over to a straight 40w like the guys are talking about. I run the Castrol hd40w and have had 0 issues

SRC
Sent from Galaxy s5

  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
5150WhiteBoy

Chad krieger

  • Karma: +7/-0
Re: 455 olds engine low oil pressure
« Reply #12 on: August 22, 2014, 10:42:28 AM »
I run a 20-50 blend with a zinc additive.


Sent from my iPhone using SoCalJetBoats mobile app
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #13 on: August 22, 2014, 12:41:18 PM »
20-50 with zinc sounds excellent or the old straight weight although the 20-50 has a little better protection when she first fires up.

Isn't the old gripe about the Old's is weak oil return anyway?  Im sure theres Olds guys to tell you the cheap tricks to help all the way to the Mondello tricks.

as far as gasket leaks from block pressure I dont wanna bore anyone with my point of view on that but gate valve or pressure relief some way to throttle it may be helpful. Sounds like it has logs I had a Tahiti with logs no valve but water just ran through it it ran cold most the time. 

  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: 455 olds engine low oil pressure
« Reply #14 on: August 22, 2014, 11:15:42 PM »
20-50 with zinc sounds excellent or the old straight weight although the 20-50 has a little better protection when she first fires up.

Isn't the old gripe about the Old's is weak oil return anyway?  Im sure theres Olds guys to tell you the cheap tricks to help all the way to the Mondello tricks.

as far as gasket leaks from block pressure I dont wanna bore anyone with my point of view on that but gate valve or pressure relief some way to throttle it may be helpful. Sounds like it has logs I had a Tahiti with logs no valve but water just ran through it it ran cold most the time.

Just because I like you ....

The "20" in your 20w-50 is only at 0 degrees F.  The "50" on the other hand is at 210 degrees...

You want to run that one by me again. I boat when the temps are near 90+. I don't the 20 wt is doing what you think it is.

GT

Sent from my SAMSUNG-SGH-I927 using SoCal Jet Boats mobile app

  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #15 on: August 22, 2014, 11:19:26 PM »
No I was just trying to get you to chime in quickly where you been. 
  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #16 on: August 22, 2014, 11:23:11 PM »
I use straight 30 weight

  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #17 on: August 22, 2014, 11:26:38 PM »
He's only at 120 temp

You didnt give him any suggestions GT
  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: 455 olds engine low oil pressure
« Reply #18 on: August 22, 2014, 11:39:12 PM »
No I was just trying to get you to chime in quickly where you been.


Here and there.... Been trying to put together a couple of engines and been spending a lot of time "shopping"...

You?
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #19 on: August 22, 2014, 11:45:30 PM »
Doing everything except anything to my boat. 
But there is no water around here anyway.  At least thats my excuse

so what info do you have for the Olds oil pressure

  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: 455 olds engine low oil pressure
« Reply #20 on: August 22, 2014, 11:52:16 PM »
Oh and the engine temp was very low as the dude I bought it from had water strait from the pump with no gate valve so it was running 120 or less. I am in the process of re-plumbing the system.

Jet Fever is making me do this or he'll put me in a time out.....  :screwy:


The cheapest way to get some use out of this deal without hurting it would be to install a 3/4" gate valve and the associated fittings to throttle the amount of water to the engine. Basically you need to idle the boat in the water with the valve wide open, slowly closing it until you see the engine temperature start to rise. Typically a real good starting point is around the 140°F to 150°F mark. Once there, take it for a spin, the water temp should drop a little and be quite stable at about 130°F or so.

A good temporary and super cheap fix for the oil return issue would be to install some roll pins in the push-rods, this will limit the amount of oil feeding the top of the valve train with no other ill effects. Pipe cleaners have also been used with varied success. Just shove them into the push rod.

As for the oil weight, I would not run anything less than 40 wt. 15w-40, 20w-40, straight 40 would all work just fine.

You have to be real careful with that station wagon pan... Too full and it will foam, too low and you run out of oil... You should be able to run it about a quart too high and you will be better off.

As for the intake manifold end leaks, does this have an iron or an aluminum intake... If aluminum, you do not need the cookie pan.... Use nothing but RTV on the ends.


GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #21 on: August 22, 2014, 11:56:53 PM »
Thanx GT. 

I didn't just wanna catch up on homeboys thread.

Excellent procedure writing skills.
  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: 455 olds engine low oil pressure
« Reply #22 on: August 22, 2014, 11:58:01 PM »
Doing everything except anything to my boat. 
But there is no water around here anyway.  At least thats my excuse

so what info do you have for the Olds oil pressure

Went down to Nacimiento last week, pretty sad, water level is at 17%.... Heading to Shasta in September and I heard it's at 31% which computes to 147 feet down from crest. Holy chit...
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

jet fever

  • Karma: +7/-2
Re: 455 olds engine low oil pressure
« Reply #23 on: August 23, 2014, 12:00:35 AM »
Yup. 

C'MON EL NINO damnit. 
  • Boat #1: 76 Hallett Bubble Deck
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

Handi-Crack

  • Karma: +3/-0
Re: 455 olds engine low oil pressure
« Reply #24 on: August 23, 2014, 10:47:22 PM »
I remember shasta when it was above the tree lines in the late 80s and 90s. Miss that place and fire works in the delta


  • Boat #1: 75 wriedt mavrick
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

 


Null

SMFPacks CMS 1.0.3 © 2026