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Here is what I have found for lower temp cooling fan switches for TPI motors. These will be direct replacements and the part numbers are for duralast parts at Autozone. SW502 is stock replacement.
SW555- 204° on $31.99
SW505- 213° on $8.99
SW500- 224° on $8.99
SW502- 229° on $5.99
Here is what I have found for lower temp cooling fan switches for TPI motors. These will be direct replacements and the part numbers are for duralast parts at Autozone. SW502 is stock replacement.
SW555- 204° on $31.99
SW505- 213° on $8.99
SW500- 224° on $8.99
SW502- 229° on $5.99
I'm going to bump this thread. Could we sticky this info?
SW500 1 3/8 x 18 Open Makes 230f ± 8
SW501 1 3/8 x 18 Open Makes 222-239 f
SW502 1 3/8 x 18 Open Makes 238f ± 8
SW505 1 3/8 x 18 Open Makes 221f ± 8
SW555 1 3/8 x 18 Open Makes 210f Breaks 205f
I believe SW555 crosses to 1S4394, D1882D, 2-8386, 98656, TFS8, 35946, 8386
Wow- that's way tighter than I thought. Thanks midias.
BTW related super finicky question (as a switch is a switch in most cases and there's plenty other brands) but at the moment I'm down in 'zona near three dozen autozones that can order the SW555 in a day. $39.99 - way cheaper than up in Canada after all the BS via online. On the other hand there's a NOS AC Delco 3053190 on fleabay that could be at my door for $75. Already got the GM 170 thermo (ACDelco 131-84) coming for a great price back home, now wondering whether to pop over to save the beer$ or just order that thermo's Delco "sibling". More importantly than that moderate cost difference though I'm mainly wondering Wells/Duramax AZ qual vs the ol' Delco.
SW555
AC Delco 3053190
Are the minor differences a "w/e" thing or improvements given the time difference ie Wells ~years later.
Just going to venture an educated guess that GM doesn't manufacture these parts in house anymore, if they ever did. Most of the ACDelco parts for 30 year old cars are just reboxed parts from the same factories that make the parts at the local parts store.
Oh yeah, that's a whole other rabbit hole. In my limited experience I've had a few dusty Delco boxes that rightly look like they'd been in a stock room since I was in grade school and some where I pestered the seller and got a minimally reassuring answer about a "new bag". In this case it looks like the latter scenario.
Well a little more reading and my question on appearance differences is answered: the SW555 requires pigtail PT770 whereas the 3053190 (apparently a Buick GN fan switch) is a direct bolt-on. 210 on/205 off is good for fan life and quicker highway offs, but 210/200 takes it a liiiil more into the fully open range of the 170 thermo for a black city car. No pigtail bonus and about the same cost = AC Delco it is.
I have an SW505 I plan to replace my stock one with.
It goes in the passenger side head near the dip stick just under the exhaust. Or you can move it somewhere else. I had moved mine to the thermostat housing before I did my LS swap. I just had to get a housing cap that had an extra port for it.
Sounds like putting it on the lift will make this job easier. Sure made changing my plugs easier. Ozz1967 thats a good idea moving it to thermostat housing
It goes in the passenger side head near the dip stick just under the exhaust. Or you can move it somewhere else. I had moved mine to the thermostat housing before I did my LS swap. I just had to get a housing cap that had an extra port for it.
Is there enough wire length to reach that location without modification?
I am about to choose the SW505 also. Feels just right to me. Now would I have to replace my stock thermo? Think its a 195 degree. I have a 1988 GTA 350 bone stock GTA TPI. ? Hope to hear back
I am about to choose the SW505 also. Feels just right to me. Now would I have to replace my stock thermo? Think its a 195 degree. I have a 1988 GTA 350 bone stock GTA TPI. ? Hope to hear back
You don't have to and if it's otherwise working fine, just leave it be. If you want it to open a little earlier you could get a 180* stat but with that fan temp, you'll be fine with the stocker.
You don't have to and if it's otherwise working fine, just leave it be. If you want it to open a little earlier you could get a 180* stat but with that fan temp, you'll be fine with the stocker.
Quick question to an old thread? Are there interchangeable with TBI models?
It goes in the passenger side head near the dip stick just under the exhaust. Or you can move it somewhere else. I had moved mine to the thermostat housing before I did my LS swap. I just had to get a housing cap that had an extra port for it.
Did you do this with aTPI and it fit under the intake manifold?
Is there enough wire length to reach that location without modification?
I realize it's been 8 years since your question, Dave lol, but since this thread was revived three posts above mine, you and Ozz have inspired me...
Yes, there is enough length of that wire. It comes out of the fan relay harness near the front of the passenger side of the block, so it will reach the front of the intake manifold more easily than the back of the head.
And similar to what Ozz did, my idea pertains to eliminating the programming for the Cold Start Injector, so, obviously, this will only work for owners of 85-88 TPI engines. Most people probably leave the Cold Start Switch in the hole as a plug. But now it can be removed, a new fan switch (or the old one) can be installed in its place, the fan switch wire will easily reach it, and the existing fan switch can be left in the head as a plug, or it can be removed (or relocated), and the hole in the head can be plugged.
This will put the fan switch right next to the Coolant Temp Sensor. Easy future access right in front. No more PITA access or working around hot manifolds or headers. Fan switch temp readings will be consistent with the information being sent by the CTS.
Or if people are removing the intake manifold to either port it or swap it and eliminating the CSI/CSS too, then it'll be easy to make the fan switch swap at that time.
And if someone is installing new heads too, then plug the new head before installation and install the fan switch up front.
