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Old 08-18-2009, 03:44 PM
rjs0421 rjs0421 is offline
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Radiator Replacement 1999 3400 engine

Has anyone ever replaced the radiator on the 3400? I know there is not a lot of room. Can it be done from the engine compartment or does it have to be removed from below. I do have a hoist in my garage.
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Old 08-18-2009, 07:20 PM
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BNaylor BNaylor is offline
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Re: Radiator Replacement 1999 3400 engine

We replaced ours with the complete front clip off and I recall we had the front end jacked up and dropped the radiator down and out. Swapped out for a higher capacity radiator. That front air foil thing at the front end is actually the part that holds the radiator up and secure. Called a radiator support bracket.



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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold)
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Old 08-31-2009, 03:28 PM
rjs0421 rjs0421 is offline
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Re: Radiator Replacement 1999 3400 engine

Thanks for the info, I actually ended up figuring it out. Did not remove the front clip but I have a hoist so I was able to take everything off up top because I also changed the thermostat, a pain in the butt there too. Anyway dropped the radiator from below. There are 2 annoying screws that hold the front plastic shroud to the radiator, not easy to get to unless you do reove the front clip. But I was able to do it. Could not find a high capacity radiator but found one made by delphi, now the car runs at a temp that is in the middle of the guage which is much better than is was before.
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