Thermostats

[bamspringtx]

You guys know if the thermostat assembly comes with new gasket and pressure relief valves, springs, etc... Or do i need to order all the small parts too. I would like to replace all the stuff under the t-stat cover.

This is for a 90 e150stlesb.

Thanks.

[Danrude]

Each item is separate so order everything between the cover and seat.

[bamspringtx]

Thanks,
Everything is on the way! I hope. Looks like will have it apart over the 3 day weekend coming up.

[wiggle]

It will only take a few minutes to change out the thermostats. I changed mine a few weeks ago, and it didn't take long.

Brad

[bamspringtx]

Well,
Too my surprise there where no t-stats. Looks like the last mech left them out. Here in SE Texas, they may not be needed? We decided to leave them out for now, to enable some trouble shooting 1 step at a time. I did replace poppett/pressure relief parts.

We have been getting a high temp alarm above 35 mph, below that no problem. Good tell-tale stream. Decided to put pressure gauge on motor. The only place I can find is to tee into the tell-tale. When I did this on a mercury it did not give a correct reading. I am getting 2-3 idle, 8-9 wot.

Replaced impeller, found last mech had pinched rubber o-ring on impeller housing allowing a leak. After new impeller, verified no leaks on muffs with lu in stand, we still get same pressure readings. However, the over temp alarm did not sound @ wot. So it looks like we got 1 issue resolved.

Verified water flow out of both t-stat locations. Port side might have a little more flow.

Will not having t-stats create the lower water pressure, or is that pressure normal for being tied into the tell tale?

Thanks for any help.

[rude power]

pretty sure you need the stats in.

[Danrude]

The engine will not reach operating temperature without the t-stats, also the pressure will build up better with them in there.

[ChampioNman]

Time to pull the heads and replace the water deflector pins in the cooling/water passages in the head. You'll need two head gaskets and 12 deflector pins for the passages. They come in packs of 6 but you need only 5 per side.

[bamspringtx]

He has had those water deflectors replaced several years ago, and I figured they may need it again. You would not happen to have the torque specs/ bolt pattern for the heads do you?