Having trouble finding correct acdelco thermostat
#1
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Having trouble finding correct acdelco thermostat
So I ordered an acdelco thermostat w/ water inlet off rockauto. I got the part in and the thermostat is too wide for the water pump inlet. So I examined the part and the one I ordered is stamped 12571261 and my original is stamped 12567563. I googled my original and can't come up with much. Has anyone had this problem or know of the part number that I need? Any help would be appreciated and I want an acdelco part, not something from any parts store.
#5
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the 12567563 doesn't show up in the following site,the 12571261 does,evidently no longer available.
http://www.oehq.com/oeparts_12567563...TOKEN=84949761
http://www.oehq.com/oeparts_12567563...TOKEN=84949761
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#9
TECH Senior Member
A few years ago GM changed the pumps to the newer style, that's why the old hypertech tstats won't fit anymore. People were buying the 160 from SLP and woundn't fit due to the pump being replaced somewhere along the line. Keep the stock thermostat, not worth changing to 160 anyway.
#11
even checking the stock to replace, found to be designed the same way. the thermostat is built into a new housing. the posts that hold the thermostat wont allow it to be inserted into the block. im thinking maybe i have a different water pump.
#12
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For a while AC Delco stocked both types of pumps and recently phased out the older model. So, if you have an older car that came from the factory with the old model pump and someone replaced it - you may have the new pump on the car. The only way to know for sure is to check the number on the castings.
More info on the phase-out: http://www.acdelcotechconnect.com/pdf/10JTI-064.pdf