C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

pulling L98 water pump

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Old Sep 17, 2010 | 02:16 PM
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Default pulling L98 water pump

ok, so I need to pull the pump and I'm curious as to what size wrenches I need to disconnect the fuel lines
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Old Sep 17, 2010 | 04:07 PM
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5/8" line wrench for both of them.

Just did my waterpump less than a month ago. If it's still there leave the frisbee off. Noticable improvement.
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Old Sep 17, 2010 | 08:52 PM
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Originally Posted by MyFirst90coupe
5/8" line wrench for both of them.

Just did my waterpump less than a month ago. If it's still there leave the frisbee off. Noticable improvement.
uhm, what is the frisbee? im a corvette noob lol
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Old Sep 18, 2010 | 06:26 AM
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The water pump is NOT fun on a L98. Label your bolts from your a.i.r. stuff
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Old Sep 18, 2010 | 09:44 PM
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What year is your Vette? I'd rather not guess.

Jake
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Old Sep 19, 2010 | 06:55 AM
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the frisbee is a big flywheel lookin' thing that's bolted to the waterpump pulley

looks like the OP has an 86 - i'm not sure what years they used the "frisbee" on the L98's. i know, 85 no, 90 yes.

as for tools, make sure you use a flare-nut wrench on the fuel lines, mark and label all hardware - you have to do a lot of "wrenchin'" to get the waterpump off. there are a lot of different size and lengths of bolts, and nuts. be neat and ORGANIZED, and take your time!!! just for the hell of it, get in there and take several pictures of the configuration of everything, including any miscellaneous brackets that support the alternator, AIR pump, AC compressor, etc. i doesn't hurt to snap a couple pics at various stages of the tear-down too. finally, use a torque wrench on re-assembly. do it right the first time - you don't want to go through this a second time...

finally, good luck, and as you're doing this, keep telling yourself, "i love my corvette, i love my corvette, i love my corvette..."

Last edited by Joe C; Sep 19, 2010 at 07:00 AM.
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Old Sep 19, 2010 | 09:02 PM
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I saw that, too, under his screen name, but I'd rather not guess. Many times guys don't change/update that info and I've ended up giving advice for the wrong year.

He might as well learn, now, to include the year info in his initial post. Then I'll tell him about the hidden torx head bolt.

Jake
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Old Sep 21, 2010 | 04:27 PM
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Originally Posted by JAKE
I saw that, too, under his screen name, but I'd rather not guess. Many times guys don't change/update that info and I've ended up giving advice for the wrong year.

He might as well learn, now, to include the year info in his initial post. Then I'll tell him about the hidden torx head bolt.

Jake
ahhhh, the hidden torx bolt - good one!!! first time i did it, nowhere did anyone or anything tell me it was a torx - ended up getting the damn thing out with a special 1/4" drive, thinwall, 14 or 15mm socket (don't remember). only after i got the thing out did i see it was a frickin' torx. ya know, the bone-head tech writers could have put that little bit of info in the FSM!!!
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Old Sep 21, 2010 | 04:51 PM
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Originally Posted by Joe C
ahhhh, the hidden torx bolt - good one!!! first time i did it, nowhere did anyone or anything tell me it was a torx - ended up getting the damn thing out with a special 1/4" drive, thinwall, 14 or 15mm socket (don't remember). only after i got the thing out did i see it was a frickin' torx. ya know, the bone-head tech writers could have put that little bit of info in the FSM!!!
LOL!

Jake
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Old Sep 21, 2010 | 04:59 PM
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Good words here. All I can add is new "O" rings on the fuel lines when you go back. Added note, I have had trouble with fuel siphoning from the disconnected lines, remove the gas cap to relieve pressure and have a foot or so of 3/8th fuel hose to connect the open feed and return lines together.
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