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maybemac
07-29-2007, 09:35 AM
Only the driverside is overheating, causing the temp guage to max out,then engine shuts down. It doesn't seem like the water is circulating to that side. Impeller is OK. Does anyone know if there are seperate water filters, which could plug the circulation???

bigmac
07-29-2007, 09:41 AM
You have two engines in your 97 Prostar?

JimN
07-29-2007, 09:43 AM
Is this only happening at idle? Try increasing the RPM and see if it goes back to normal.

Your profile shows Corvette, so your LT-1 should have bleeder lines to the exhaust manifolds and one may be clogged. Also, you have two thermostats and the one behind the water circulating pump needs to have a small hole in it. The circulating pump is different from the regular car pump, because it pumps to the heads before the block.

"Impeller is OK" means what? It looks OK? That's not as important as being resilient enough to maintain pressure and flow. If the impeller is removed and the vanes don't go back to straight or it's from last year, replace it. Check your oil cooler and clear out any weeds, twigs or anything else. I have seen many LT-1 motors get hot on one side only and a new impeller almost always cures it. If you have ever replaced yours and some of the vanes were missing, the pieces may still be lodged in the cooling system.

maybemac
07-29-2007, 10:08 AM
Thanks. We have already replaced the impeller, and have been trying to locate areas to unclog. Do you know where there might be a good diagram (exploded) of this engine. The pictures in the Mastercraft manuals aren't vey helpful.

maybemac
07-29-2007, 10:10 AM
No - I believe there is just one

JimN
07-29-2007, 11:21 AM
I would start by removing the larger hoses, on the exhaust manifolds and water pumps. Remove the plugs at the rear of the manifolds and see if there's a lot of rust scale. Use a coat hanger if you need to dislodge it. Could be something stuck in a hose, too. Look at it from the viewpoint of water going in and flowing through the system.

tex
07-29-2007, 11:36 AM
You have two engines in your 97 Prostar?
What a hole shot that thing must have!

fintek9
07-29-2007, 12:05 PM
That WOULD be cool, throwing a 360 handle pass just as you
say HIT IT......:D

bigmac
07-29-2007, 12:17 PM
Only if they can get that engine on the driver's side running reliably

Chicago190
07-29-2007, 01:03 PM
You have two engines in your 97 Prostar?

Who doesn't? If 1 is good, 2 must be better!