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 Radiator pressure cap 99 G.C. 4.7 v8
#948667
06/09/09 04:00 AM
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Joined: May 2009
Posts: 17
OP
Need a Spot
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Does anyone know if the stock 21p.s.i radiator cap can be replaced with a cap with about 14-18 p.s.i. the plastic o-ring type radiator seems to blow the o ring out every 45,000 Im on my 3rd one from the dealer 335.00 .does not have a blown head gasket nor does it over heat ,compression even through all cylinders.I think the problem is the high pressures the radiator is under,so I would like to drop the cap pressure,does anyone know if it will cause any problems.
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 Re: Radiator pressure cap 99 G.C. 4.7 v8
[Re: prospector]
#948668
06/09/09 06:22 AM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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Try it! It should work. That little bit of pressure should only correspond to 5 or 6* I betcha it would work anywhere except maybe the Sahara.. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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Re: Radiator pressure cap 99 G.C. 4.7 v8
[Re: prospector]
#948669
06/12/09 12:48 AM
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Joined: May 2009
Posts: 306
Mudrunner
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The later ones used an 18 psi cap. If you don't tow or drive in a hot climate, you might even try a 13 psi cap
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