[Z06] Katech HIgh Capacity LS7 oil pumps now CNC ported
09-29-2009, 10:14 AM
#1
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Katech HIgh Capacity LS7 oil pumps now CNC ported
I thought you guys might like to see some pictures of the inside of our ported LS7 oil pump. We are now CNC porting rather than bridgeport mill porting. Here are some pictures of the porting process done to the scavenge section.
09-29-2009, 10:44 AM
#3
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09-29-2009, 09:19 PM
#6
Melting Slicks
That's really cool looking!
09-30-2009, 08:20 AM
#8
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09-30-2009, 04:48 PM
#9
Le Mans Master
Mine is now on order. Looking forward to getting it Friday. 
Thanks for the help, Jason. Looks like a great product.
--Vince
Thanks for the help, Jason. Looks like a great product.
--Vince
09-30-2009, 09:00 PM
#10
That's on my Katech post-Obamanomics wish-list
09-30-2009, 10:21 PM
#11
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10-01-2009, 12:15 AM
#14
ok for slow people like me, can you tell us what are the main benefits?
Also, we have 4 of my friends cars currently and during the past 2months that blew their motors out of dead LS7 oil pumps, do you find those reliable?
Also, we have 4 of my friends cars currently and during the past 2months that blew their motors out of dead LS7 oil pumps, do you find those reliable?
10-01-2009, 08:26 AM
#15
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It doesn't matter how good your oil pump is if your pickup tube is not submerged in oil it is not pumping oil to the tank. At that point you have until the tank empties before you start to lose oil pressure. If your buddies starved their engines due to cornering loads then they need to upgrade the dry sump system. If your buddies blew the engines simply from oil pump failure I would be interested to know the root cause of failure.
10-01-2009, 10:22 AM
#16
Le Mans Master
The primary purpose is to increase the ability of the pump to move oil from the pan to the tank. It is also blueprinted and hand assembled for more exacting tolerances and the pressure relief valve bore is honed to prevent sticking.
It doesn't matter how good your oil pump is if your pickup tube is not submerged in oil it is not pumping oil to the tank. At that point you have until the tank empties before you start to lose oil pressure. If your buddies starved their engines due to cornering loads then they need to upgrade the dry sump system. If your buddies blew the engines simply from oil pump failure I would be interested to know the root cause of failure.
It doesn't matter how good your oil pump is if your pickup tube is not submerged in oil it is not pumping oil to the tank. At that point you have until the tank empties before you start to lose oil pressure. If your buddies starved their engines due to cornering loads then they need to upgrade the dry sump system. If your buddies blew the engines simply from oil pump failure I would be interested to know the root cause of failure.
xTooltipElement
Service Information 2008 Chevrolet Corvette | Corvette (VIN Y) Service Manual | Bulletins By Category | Information | Document ID: 2214865
--------------------------------------------------------------------------------
#PIP4158B: Low Oil Pump Pressure Due To Seized Oil Pressure Relief Valve - (Dec 1, 2008)
Subject: Low Oil Pump Pressure due to Seized Oil Pressure Relief Valve
Models: 2008-2009 Buick Lacrosse, Allure (Canada Only)
2007-2009 Cadillac Escalade
2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer
2007-2008 Chevrolet Monte Carlo SS
2007-2009 Corvette, Impala SS
2009 Chevrolet Colorado
2007-2009 GMC Envoy, Sierra, Yukon
2009 GMC Canyon
2008-2009 Hummer H2
2008-2009 H3 Alpha
2008-2009 Pontiac Grand Prix
2008-2009 Pontiac G8 GXP
2007-2009 Saab 97x
with Aluminum Gen IV V8 Engine Block
(RPO Codes L76, L92, L9H, LC9, LH6, LH8, LS2, LS3, LS4, LS7)
--------------------------------------------------------------------------------
This PI was superseded to update models and to clarify that the PI is referring to the oil pressure relief valve in the oil pump. Please discard PIP4158A.
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain of low oil pressure, no oil pressure
, and/or engine noise. This may be the result of a sticking oil pump pressure relief valve. In some instances, the customer may experience this intermittently if the valve frees up when the engine cools down.
Recommendation/Instructions:
If the SI diagnosis isolates low mechanical oil pressure, replace the oil pump, flush the oil cooler lines (if equipped), clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.
Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
Service Information 2008 Chevrolet Corvette | Corvette (VIN Y) Service Manual | Bulletins By Category | Information | Document ID: 2214865
--------------------------------------------------------------------------------
#PIP4158B: Low Oil Pump Pressure Due To Seized Oil Pressure Relief Valve - (Dec 1, 2008)
Subject: Low Oil Pump Pressure due to Seized Oil Pressure Relief Valve
Models: 2008-2009 Buick Lacrosse, Allure (Canada Only)
2007-2009 Cadillac Escalade
2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer
2007-2008 Chevrolet Monte Carlo SS
2007-2009 Corvette, Impala SS
2009 Chevrolet Colorado
2007-2009 GMC Envoy, Sierra, Yukon
2009 GMC Canyon
2008-2009 Hummer H2
2008-2009 H3 Alpha
2008-2009 Pontiac Grand Prix
2008-2009 Pontiac G8 GXP
2007-2009 Saab 97x
with Aluminum Gen IV V8 Engine Block
(RPO Codes L76, L92, L9H, LC9, LH6, LH8, LS2, LS3, LS4, LS7)
--------------------------------------------------------------------------------
This PI was superseded to update models and to clarify that the PI is referring to the oil pressure relief valve in the oil pump. Please discard PIP4158A.
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain of low oil pressure, no oil pressure
, and/or engine noise. This may be the result of a sticking oil pump pressure relief valve. In some instances, the customer may experience this intermittently if the valve frees up when the engine cools down.Recommendation/Instructions:
If the SI diagnosis isolates low mechanical oil pressure, replace the oil pump, flush the oil cooler lines (if equipped), clean the inside of the oil pan, change the oil and filter, and re-evaluate the concern.
Notice: If an engine noise is noticed after replacing the oil pump, follow the SI diagnosis and repair the engine as necessary.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
10-02-2009, 02:06 AM
#17
The primary purpose is to increase the ability of the pump to move oil from the pan to the tank. It is also blueprinted and hand assembled for more exacting tolerances and the pressure relief valve bore is honed to prevent sticking.
It doesn't matter how good your oil pump is if your pickup tube is not submerged in oil it is not pumping oil to the tank. At that point you have until the tank empties before you start to lose oil pressure. If your buddies starved their engines due to cornering loads then they need to upgrade the dry sump system. If your buddies blew the engines simply from oil pump failure I would be interested to know the root cause of failure.
It doesn't matter how good your oil pump is if your pickup tube is not submerged in oil it is not pumping oil to the tank. At that point you have until the tank empties before you start to lose oil pressure. If your buddies starved their engines due to cornering loads then they need to upgrade the dry sump system. If your buddies blew the engines simply from oil pump failure I would be interested to know the root cause of failure.
the most recent three:
1- drove the car in 3rd to 7000rpms, let off, got a check engine light (low oil pressure) CONTINUED DRIVING with zero oil pressure for 10mins (dont ask me why), and his bearings were toast, had to rebuild the engine. Stock minus a tune.
2- aggressively driven Z06 (no track driven just street), stock minus a K&N aircleaner and a tune. Came to realize his engine is toast after noticing lower than usual oil pressure dips, tried changing oil/filter etc... Took it to the dealer, switched the oil pump with no luck, so its getting a new LS7
3- another aggressively driven Z06 (street), almost same problem as no.2, started hearing weird drivetrain noises accompanied with a "low oil pressure" CEL, turned off the car, and towed to the garage, still trying to figure out the problem. This car as a vararam, LGX3, LG offroad x-pipe, tune.
A friends engine builder (in the states) uses some double oil-pump set-up that fits on the LS7 and to be honest it looks like a good peice, the car will be running in a weeks time and I can report back.
10-02-2009, 11:12 AM
#18
Le Mans Master
Pump arrived this morning. Thanks for expediting, Jason. I hope this is the problem. #2 and #3 above sound eerily familiar, although my CEL is random misfire from the cam, I believe (I hope). My drivetrain noises were from loose bolts in the Elite tunnel plate (fixed now). Motor wasn't making any unusual noises, so I am praying that this low pressure incident didn't cause any serious damage.
10-03-2009, 01:05 AM
#19
Le Mans Master
Jason, This is alittle off topic but I've been hearing a whirling sound( almost like howling wind) coming from my car when I accelerate between 1500-2300 RPMs. I think it coming from the rear but am not sure. What do you think it could be? You think its actually coming from the motor? The cars drives fine, but that sound has me worried.
10-15-2010, 02:21 PM
#20
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Thread Starter
We just finished up a batch today. These are back in stock for anyone who was waiting.