OP
OP
Just Fishing
Can't fix stupid
No more filter, i have the no vlom valley plate now.
But good point, i should pull the sensor and check it.
Just Fishing's 09 Tahoe Build thread
- Thread starter Just Fishing
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No more filter, i have the no vlom valley plate now.
But good point, i should pull the sensor and check it.
iamdub
Full Access Member
I also went through my pump last night, it's not terrible.
the housing looks pretty good
but the rotor and slide looks like it might have pumped/grinded up some little bearing bits.
I did some light cleanup of the rough bits, and i think i could use it.
but should i...
it's a $160 pump.
It was pumping just fine, my oil pressure was great and stuff.
the idle oil pressure did start going under 40psi hot...
but i could still pin the oil pressure gauge at wot.
From your description, it sounds like the pump is fine. There's no need to peg the pressure. That's just excess load on all the seals involved. Based on your other symptoms (glitter in oil), your loss of pressure is not from the pump getting weaker, but from tolerances getting wider, likely cam bearing(s). Since you have the pump apart, why not port it? Oh- and pull out the relief valve to make sure there's no metal in there. You don't want it getting stuck open.
OP
OP
Just Fishing
Can't fix stupid
I was in the area earlier today, and stopped by a machine shop we used in auto shop class.
They have a pretty good reputation etc.
First i went against my better judgment and explained exactly what i was trying to do.
Guy did his best to be as nice as possible as he worked to understand and then poke holes in my plan.
Apparently i forgot to mention i ordered a brand new 6.0 block, and he thought i wanted to bore out my 5.3 to a 4in bore.
I also think i blew his mind with the information that the 5.3 crank and rods are the same as the 6.0.
He was doing the same super polite questioning of my logic, maybe he thought i was on drugs or something.
Anyways, it sounds like he wants $200 to do the balance and another 100 to work the crankshaft.
He also told me to bring in the pump, and he can give it a good look over.
And for the pistons, i went full circle and worked to find the matching pistons for the 799 heads and the 6.0 engine.
Looks like a 09 trail blazer SS used the 6.0 engine, with the 799 heads.
And used flat top pistons!
GM PN: 19178305
I found that this comes as a Mahle PN: S224-3665
and then ends up right back at my original piston find!
https://www.summitracing.com/parts/slp-h1129cpa
I also confirmed that the 5.3 rods have the PN: 12649190
And the 6.0 confirmed the same PN!
so i think i have my wrist pin size and all figured out now...
Thoughts?
They have a pretty good reputation etc.
First i went against my better judgment and explained exactly what i was trying to do.
Guy did his best to be as nice as possible as he worked to understand and then poke holes in my plan.
Apparently i forgot to mention i ordered a brand new 6.0 block, and he thought i wanted to bore out my 5.3 to a 4in bore.
I also think i blew his mind with the information that the 5.3 crank and rods are the same as the 6.0.
He was doing the same super polite questioning of my logic, maybe he thought i was on drugs or something.
Anyways, it sounds like he wants $200 to do the balance and another 100 to work the crankshaft.
He also told me to bring in the pump, and he can give it a good look over.
And for the pistons, i went full circle and worked to find the matching pistons for the 799 heads and the 6.0 engine.
Looks like a 09 trail blazer SS used the 6.0 engine, with the 799 heads.
And used flat top pistons!
GM PN: 19178305
I found that this comes as a Mahle PN: S224-3665
and then ends up right back at my original piston find!
https://www.summitracing.com/parts/slp-h1129cpa
I also confirmed that the 5.3 rods have the PN: 12649190
And the 6.0 confirmed the same PN!
so i think i have my wrist pin size and all figured out now...
Thoughts?
OP
OP
Just Fishing
Can't fix stupid
I just searched ebay for that GM piston PN, and came up with this: https://www.ebay.com/itm/Genuine-GM...Top-LS2-LQ4-LQ9-88894241-NEW-OEM/143324493694
The price looks a little too good to be true...
$25 a piston.
looking around they appear to be a good $50 each from places i trust.
The price looks a little too good to be true...
$25 a piston.
looking around they appear to be a good $50 each from places i trust.
Tonyrodz
Resident Resident
OP
OP
Just Fishing
Can't fix stupid
ty!
and i was just dicking around with a compression ratio calculator,
So if the stock config of my 5.3 (per summit) is "9.9 : 1"
Keeping it the same but increasing the bore size should boost it to: 10.93 : 1
Might be getting up there to the needing premium fuel!
I need to calculate the DCR probably, but maybe i should go for some valve reliefs?
Edit: maybe i'm over thinking this and should embrace my new boosted CR!
and i was just dicking around with a compression ratio calculator,
So if the stock config of my 5.3 (per summit) is "9.9 : 1"
Keeping it the same but increasing the bore size should boost it to: 10.93 : 1
Might be getting up there to the needing premium fuel!
I need to calculate the DCR probably, but maybe i should go for some valve reliefs?
Edit: maybe i'm over thinking this and should embrace my new boosted CR!
Last edited:
OP
OP
Just Fishing
Can't fix stupid
been looking over my 5.3 block and taking note of other things i'll need to order.
Looks like the new block won't come with plugs.
Anything threaded should transfer over just fine.
However the oil gally plug at the front of the engine
Looks to be this one: https://www.summitracing.com/parts/btc-btr27693
Has anyone threaded it?
Or am i better keeping it with the standard plug?
Looks like the new block won't come with plugs.
Anything threaded should transfer over just fine.
However the oil gally plug at the front of the engine
Looks to be this one: https://www.summitracing.com/parts/btc-btr27693
Has anyone threaded it?
Or am i better keeping it with the standard plug?
OP
OP
Just Fishing
Can't fix stupid
New block just arrived.
If anyone is wondering, the shipping weight was listed at 311 lbs.
Probably won't mess with it until later this week, or this weekend.
If anyone is wondering, the shipping weight was listed at 311 lbs.
Probably won't mess with it until later this week, or this weekend.
Nice!
OP
OP
Just Fishing
Can't fix stupid
And i got the cam bearings pulled
Sorta destructively, so don't pay attention to the edges.
Sorta destructively, so don't pay attention to the edges.
OP
OP
Just Fishing
Can't fix stupid
not great, but the amount of metal in the pan i was expecting to see a bearing destroyed or just super thin.
OP
OP
Just Fishing
Can't fix stupid
Crank Journal.
OP
OP
Just Fishing
Can't fix stupid
One of the main bearings.
iamdub
Full Access Member
OP
OP
Just Fishing
Can't fix stupid
It'll lose a little weight when you have it bored to 6.2, 6.3 or whatever.
I was thinking the larger cylinders are nice, but are they really big enough?
I saw what i believe was an LS7 block at the machinist, now those are some girthy cylinders!
OP
OP
Just Fishing
Can't fix stupid
Now you have me wondering, I wonder what the weight difference between the 6.0 and the 5.3 are...
Meh too lazy to google it, and i sure as hell am not planning on weighing it.
Meh too lazy to google it, and i sure as hell am not planning on weighing it.
pwtr02ss
Full Access Member
Now you have me wondering, I wonder what the weight difference between the 6.0 and the 5.3 are...
Meh too lazy to google it, and i sure as hell am not planning on weighing it.
I don't think they are very much different.
So all the crank and rod bearings looked good? Only cam bearings have wear? It wasn't making any noise? I'm very curious about this metal mystery
OP
OP
Just Fishing
Can't fix stupid
I think i need one of those oil analysis things.
I should still have a bit left in the filter...
I should still have a bit left in the filter...
OP
OP
Just Fishing
Can't fix stupid
got the 6.0 on the stand today.
Did a little deburring and removing the sharp edges.
Did a little deburring and removing the sharp edges.
OP
OP
Just Fishing
Can't fix stupid
like they are bigger, but are they really big enough?
