G23 XS550 overheating

[Evening Shade]

Guys, thanks for the help . Maybe I'm blind or something, but I'm not seeing the egg shaped filter housing anywhere?

I could be wrong, but you have a XS550 and it may not have the filter because of the different exhaust manifolds. The service bulletin only refers to the XR550.

[d_nodixon]

Well dang, thought we had we him figured out. Sorry for the miss info...will read the post better next time. What's the difference between the two anyway?

Sent from my VS985 4G using Tapatalk

[Evening Shade]

Well dang, thought we had we him figured out. Sorry for the miss info...will read the post better next time. What's the difference between the two anyway?

Sent from my VS985 4G using Tapatalk

The XR550 has traditional cast iron catalyst manifolds. The XS550 has polished SS manifolds that dump in what looks like long tube headers. Look at the pic in SVXTC last post. You can see the manifold/headers.

[nohlan_4]

The XR550 has traditional cast iron catalyst manifolds. The XS550 has polished SS manifolds that dump in what looks like long tube headers. Look at the pic in SVXTC last post. You can see the manifold/headers.

So the XS is a completely different setup? Can't understand how they can work differently but be the same motor with one just dressed up to look fancier. Gotta be a thermostat in there somewhere I would think.

[Evening Shade]

So the XS is a completely different setup? Can't understand how they can work differently but be the same motor with one just dressed up to look fancier. Gotta be a thermostat in there somewhere I would think.

I don't know for sure. I just saw that SVXTC has the XS550 and the service bulletin only mentions the ZR6, ZR450, and XR550, not the XS550. There doesn't have to be a thermostat. In fact, it was not used on early serial number engines. It was added at a later date.

[SVXTC]

There is a thermostat on my XS550. I had to replace once already about 30 hours ago. That time it was easy to diagnose though. I just didn't think this time it would be a thermostat since it holds correct temp for 30-40 minutes.