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#1
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A question to PWR radiator users.
I have been running my PWR rad for about 6 months or so without any real issues - except for one. When my coolant reaches temperature and the cap's plunger opens to allow for the expansion tank to fill, coolant leaks out past the cap-to-filler neck gasket. My loss is minimal (4 - 10 oz/week), but I hate smelling that sweet coolant smell when I get out of the car. I have no leaks anywhere else - just at the cap; whatever coolant leaks ends up evaporating from dripping across the top of the hot rad.
I suspect that the threaded nipple (at the filler neck) that holds the expansion tank hose is of insufficient diameter, impeding flow of warm coolant to the expansion tank. The sealing surface for the cap gasket is really thin and the expanding coolant leaks past it. The thin gasket is also letting air get sucked in as it cools - the expansion tank stays pretty full, but the radiator header has a air gap at the top of a few ounces. Does anyone else have this problem with the PWR rad? If so, what are the fixes? Bore out the hose nipple? New cap (non PWR supplied)? Double up on the cap-to-filler neck gasket material? Any and all help is appreciated. |
#2
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Did you get the new cap that PWR sent out? If not, that may help.
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19 |
#3
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PWR Caps
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#4
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Mine doesn't do it.
I am still using the oem cap with one ear ground off. Have you tried blowing through your overflow hose to make sure it isn't plugged?
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Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P. |
#5
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