LS1 vs LQ4 Water Pumps
Thread Starter
Teching In
Joined: Oct 2007
Posts: 5
Likes: 0
From: Newberg, OR
LS1 vs LQ4 Water Pumps What is the depth difference between the two water pumps and will everything interchange? I have a '04 6.0L LQ4 and I am really crammed for space with my electric fan and radiator. I know the LS motors have a shorter snout on the water pump so thought that might be a better option for me since I can't place the motor back any further than it already is.
Also would the throttle cable brackets from the early '99 - '01 6.0L fit on my newer 6.0L? I converted to a mechanical throttle body since I am running a 700r4 behind the engine. Thanks again.
LT
Also would the throttle cable brackets from the early '99 - '01 6.0L fit on my newer 6.0L? I converted to a mechanical throttle body since I am running a 700r4 behind the engine. Thanks again.
LT
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
It wont be a direct bolt on. The WP on the f-body has the pulley 3/4" closer to the engine. However if you keep the truck accy belt routing the upper rad hose would exit through the belt if you used a f-body pump.
The TB cable brackets should work, but IIRC there is 1 bolt hole on your intake that does not have a threaded insert in it. That hole was not used for Fly by wire, but cable TB brackets use is. I think a few people have just set a bolt in it to keep the bracket from turning.
The TB cable brackets should work, but IIRC there is 1 bolt hole on your intake that does not have a threaded insert in it. That hole was not used for Fly by wire, but cable TB brackets use is. I think a few people have just set a bolt in it to keep the bracket from turning.
My understanding is that the pumps are the same, except for the outlet on the front of the LS and on top of the LQ. The pulleys are different and can be changed between the 2 pumps.
If you gop to the LS pump, the pulley will be farther back. That means you'll need an LS ballancer and LS accessory brackets to keep everything aligned.
As for changing to cable TB. I hope you realize you'll need a computer and harness for cable TB. The DBW does not have provisions for IAC.
If you gop to the LS pump, the pulley will be farther back. That means you'll need an LS ballancer and LS accessory brackets to keep everything aligned.
As for changing to cable TB. I hope you realize you'll need a computer and harness for cable TB. The DBW does not have provisions for IAC.
Its not the truck pump its the belt routing of the truck accessories to a car intake that is an issue. But OP doesn't have that problem.
The LS1/LS2 replacement water pumps come with an extra wide pully to fit various applications. Get the LS2 pump and see if the rest of your accessory drive parts still line up.
The LS1/LS2 replacement water pumps come with an extra wide pully to fit various applications. Get the LS2 pump and see if the rest of your accessory drive parts still line up.
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Thread Starter
Teching In
Joined: Oct 2007
Posts: 5
Likes: 0
From: Newberg, OR
My understanding is that the pumps are the same, except for the outlet on the front of the LS and on top of the LQ. The pulleys are different and can be changed between the 2 pumps.
If you gop to the LS pump, the pulley will be farther back. That means you'll need an LS ballancer and LS accessory brackets to keep everything aligned.
As for changing to cable TB. I hope you realize you'll need a computer and harness for cable TB. The DBW does not have provisions for IAC.
If you gop to the LS pump, the pulley will be farther back. That means you'll need an LS ballancer and LS accessory brackets to keep everything aligned.
As for changing to cable TB. I hope you realize you'll need a computer and harness for cable TB. The DBW does not have provisions for IAC.
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Teching In
Joined: Oct 2007
Posts: 5
Likes: 0
From: Newberg, OR
Its not the truck pump its the belt routing of the truck accessories to a car intake that is an issue. But OP doesn't have that problem.
The LS1/LS2 replacement water pumps come with an extra wide pully to fit various applications. Get the LS2 pump and see if the rest of your accessory drive parts still line up.
The LS1/LS2 replacement water pumps come with an extra wide pully to fit various applications. Get the LS2 pump and see if the rest of your accessory drive parts still line up.
Thread Starter
Teching In
Joined: Oct 2007
Posts: 5
Likes: 0
From: Newberg, OR
Propane works great on the trails. We call it poor mans version of fuel injection. Don't have to worry about computers, fuel pumps or really that much tuning. My problem is the engine I am running the propane on. The original inline 6 motor is at 7.8:1 compression which leaves much to be desired for power and fuel efficiency. I am going to be putting an earlier model straight 6 head that will bump my compression up to around 9.0:1 or greater hopefully which will really help out.
