Post by: Aevery757 on July 24, 2017, 02:04:16 AM
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Post by: 84BajaBR454 on July 24, 2017, 07:26:57 AM
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Post by: 69SANGERFLAT on July 24, 2017, 02:02:41 PM
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Post by: Aevery757 on July 24, 2017, 07:35:24 PM
Had something similar happen as well, nothing at idle, nothing on the trailer, sounded like an exhaust leak, mine was the number 7 rod bearing though, got hot and spun but didn't demolish itself so the sound wasn't what I expectedThat's kinda what I'm thinking to guess I won't for sure now till I pull motor 2 season ago I spun cylinder 8's rod bearing but couldn't hear it at a idle but was able to hear it when I left off the throttle it give a couple wrap sounds and then settle down thank for the info guys
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Post by: Aevery757 on July 25, 2017, 10:15:08 PM
Had something similar happen as well, nothing at idle, nothing on the trailer, sounded like an exhaust leak, mine was the number 7 rod bearing though, got hot and spun but didn't demolish itself so the sound wasn't what I expectedDid they kinda look like this
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Post by: Aevery757 on July 25, 2017, 10:16:22 PM
Did they kinda look like thisThere journal looks ok I think I misuse caught it in time
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Post by: GT Jets on July 25, 2017, 10:42:34 PM
There journal looks ok I think I misuse caught it in time
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That's gotta come apart..... All the way down.
Post by: Aevery757 on July 25, 2017, 11:05:28 PM
Yeah just not sure where I went wrong my clearances were all in spec I got maybe 10 hours on these bearings and crank
That's gotta come apart..... All the way down.
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Post by: GT Jets on July 25, 2017, 11:16:11 PM
Yeah just not sure where I went wrong my clearances were all in spec I got maybe 10 hours on these bearings and crank
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The ten questions;
What oil?
What oil filter?
What oil pan?
What block?
What where the rod clearances?
What were the main clearances?
What bearings?
How many RPM max?
Is it just the rods, or do the mains look like crap too?
Any idea what oil temp?
GT
Post by: Aevery757 on July 25, 2017, 11:29:27 PM
The ten questions;Mobil 1 full synthetic 10-30
What oil?
What oil filter?
What oil pan?
What block?
What where the rod clearances?
What were the main clearances?
What bearings?
How many RPM max?
Is it just the rods, or do the mains look like crap too?
Any idea what oil temp?
GT
Bosch filter I usually run a Delco pf454
Oil pan I'm not sure of it was the one that came with my motor already in the boat holds about 7 quarts
It's a hi perf passenger block 2bolt main I looked up the casting numbers and it came up as 2bolt or 4 bolt is a 78 I'd have to look it up again it's been awhile
My clearances I wrote them down I'll have to go back through my stuff I platigadged them and I remember there where dead on
Bearings where clevite
Rpms 4-4500 max never for long
And I'm going to pull the rest of the caps and mains tomorrow. I seen this and called it a night
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Post by: 69kona on July 26, 2017, 05:28:40 AM
The ten questions;
What oil?
What oil filter?
What oil pan?
What block?
What where the rod clearances?
What were the main clearances?
What bearings?
How many RPM max?
Is it just the rods, or do the mains look like crap too?
Any idea what oil temp?
GT
what he said ... what's up Glen haven't seen u on here in awhile ? Got some oil temp / cooler questions for you Sent from my iPhone using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)
Post by: GT Jets on July 26, 2017, 06:31:56 PM
Quote
Mobil 1 full synthetic 10-30
Sure seems light.
Quote
Bosch filter I usually run a Delco pf454
Both seem OK....Try a WIX Racing or NAPA Gold... Cheap and a quality filter. That don't happen often..
Quote
Oil pan I'm not sure of it was the one that came with my motor already in the boat holds about 7 quarts
A picture would be awesome.
Quote
It's a hi perf passenger block 2bolt main I looked up the casting numbers and it came up as 2bolt or 4 bolt is a 78 I'd have to look it up again it's been awhile
So no weird oil porting.... Should be good...
Quote
My clearances I wrote them down I'll have to go back through my stuff I platigadged them and I remember there where dead on
Plastigauge is somewhat useless... JMO
Quote
Bearings where clevite
Any idea what series?
Quote
Rpms 4-4500 max never for long
And I'm going to pull the rest of the caps and mains tomorrow. I seen this and called it a night
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Cool.
GT
Post by: GT Jets on July 26, 2017, 06:33:08 PM
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Hit me... Started a new job and have been busier than a cat covering crap during a hurricane using confetti...
GT
Post by: Six-Oh-Nine on July 27, 2017, 03:56:14 AM
Did they kinda look like this
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Gawdamn... that ain't too purdy. The crank journal... might be the pic... but what's going on with the surface finish? Was it like that on assembly? Bearings kinda giving signs of either poor lubracation gone to far... or some clearance issue. Was that 38-40 oil psi at idle? Wot? Cold temp? Operating temp? And what sort of clearance were you seeing on the rods? Well... mains as well?
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