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6.5 piston oil squirter pictures

Will L.

Will L.

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If anyone has a block where you can post pics, or anyone better at google searching than me (almost everyone probably-haha)
I would like to see some oil squirter pics please. I have my 99 van block that should have them but getting to that engine is a nightmare currently.

Thanks!
 
these being added to help the added piston heat from the turbo addition.
But they have been blamed for adding to block crack in main webs. Idk if true or not.

The high volume oil pump was created for their addition, but i have used hv oil pump in non squirter blocks without zero issues other than higher oil pressure and maybe loose a couple hp in theory.

I’m debating adding them to my current build, but honestly haven’t double checked if my 04 optimizer has them - it’s been a while since looking it over and I never pay attention to them until it’s time to clean all the oil ports.

Basically trying to think through the options and order up parts.
 
Will L. said:
these being added to help the added piston heat from the turbo addition.
Click to expand...

IMO the better solution is just coat the pistons. Are you reducing the compression ratio?

At some point the engine oil can't take the heat with uncoated pistons and no squirters. Like EGT 1550, ATT, and a spool valve on 6.2L NA precups.

I read somewhere the factory tooling nicked the bottom of a cylinder when drilling the holes for em leaving a stress riser for cracks to start.
 
Yes, I have TSP’s 18:1 coated pistons.
But I am beginning with fuel at 110 cc and looking at hx40 running enough bikst to offset the compression drop easily.
Balanced rotating assy, gear drive, german bosch marines (2 sets to swap in & out to find optimal pressure), p400 heads, roller rockers- still considering 1.7 vs 1.6.
Better valve springs& lifters, etc.

But running the oil squirters is such a proven help for boosted engines that it isn’t even a question for any new engines built by mfrs.
I’m not 100% on it but leaning very strongly towards them.

Yeah- tooling nicks were a thing for sure, but high speed mass production error isn’t really a concern for me. I would be doing this by hand (jig set most likely) and taking my time.

Idk what years had them, what didn’t. But I have the May 99 van engine to compare and determine angles, etc if I go with it (provided it has them).

If GM ended up abandoning it, I would be comfortable not running them. But the fact they are still in use in the optimizers tells me their failure rate couldn’t have been horrible.
 
Wasn't it the 506 blocks that had the squirters that started somewhere in 97-98? I need to see if I can pull the block cast number on the 93 which is supposed to have a 99 year engine in it. I know my 95 has a 599 block and does not have the squirters iirc
 
Will L. said:
If GM ended up abandoning it
Click to expand...

What GM did with this disposable engine is frankly an embarrassment. You will need other engines to validate the need. Are you solving one of the many deficiencies with this engine and/or a hot rodding problem in general?

What about loosing oil pressure with them?

So you want your engine to live forever? Other than the crack risk that you have taken steps to reduce the risk of... I have proven you can burn the oil up in a 6.2L without the oil squirters. Maybe more oil on the pistons would have prevented the oil failure or it needed more oil cooling in addition to squirters. I solved the problem on that project pile of parts with switching to synthetic.

Other engines simply scuff a piston to ruin if the oil squirt plugs for that cylinder. Say if a OCOD comes apart on a 5.9L or 6.7L Cummins and a chunk plugs the nozzle. The warranty claim posted online for that 6.7L engine through FRAM was EPIC.

So they can be not only useful but required.
 
Twisted Steel Performance said:
Just know their are 2 different size nozzles...
Click to expand...
Please elaborate more. I know the p400 nozzles are different than the 6mm listed above. Is there 2 different ones for the regular 6.5?
I never had to chase this task before.

Yes, I was thinking mine being 04 GEP it should have had them but they hadn’t dedicated all engines to the turbo design yet. I wasn’t sure if some still didn’t have it. Most of my shop in inaccessible right now so I am just trying to order up parts that I can, anticipating price bumps after the new year.

@WarWagon As to loss of oil pressure/ volume because of them: zero concern.
I can tune up an oil pump with better clearancing, coatings to ease the added load, I get to set my bearing clearances and can make all kinds of little adjustments to help that.

Even if worse comes to worse and once broke in the numbers get low- I will simply have a couple gears made that are taller than the regular hv oil Pump, then take another mid section from my old pump and mill it down. The height of the gears and the spacer to accommodate them is the only difference in the 6.2 to the hv 6.5 oil pumps. Obviously the pickup tube is different for them and different pans, but another easy modification.
 
Yeah, I would rather pump a ton up there if possible.
I am all about keeping pistons, cylinders & heads cool. I would be quite content if my ect lived at 165 and my egt never broke 600! Haha- laughing (because it’s unrealistic) but seriously would love it.
 
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