Just installed my MAF gasket (MAF to airbox) which I determined was missing in some prior maintenance event. PO did a MAF so likely the old gasket got lost or destroyed. Now it has a gasket. That should cut the sand intake by at least 50%....
Then I did the thermostat. It wasn't that bad. Rough steps I took:
- Remove radiator cover (two plastic thumb rivets)
- Remove air intake tube/elbow (TB to MAF, two hose clamps, and remove the PVC breather line)
- Remove 3 10mm bolts and the thermostat housing pulls off the block
- Pull thermostat with gasket out of the housing
- FSM says to replace gasket but I reused it by swapping it to the new thermostat (discard the black rubber gasket that may come with the new stat; I think that is for the FWD Northstars)
- I did blow it off with compressed air to get the crap off it. It didn't look torn
- Press new thermostat/gasket into housing carefully
- Install housing back on engine
- Install 3 bolts, torque to 89 lb-in (yes I actually did, well, about 7.5 lb-ft)
- Install the rest of the crap you removed
- Add coolant. Mine took a full gallon which is actually good.
I didn't let it warm up enough to build pressure but I think I am fine. I will watch it for a few days, making sure the level is good, etc. I probably spent 1.5 hours on everything taking my time. Cost was under $20. The thermostat is really probably a 20-30 minute job, which is actually quite good.
I am interested to see if it warms up faster next time I drive it as that was kind of the reason I did the stat. The one I took out looked original. 133k and 13 years.
For the record, this is the correct gasket for the LH2 Northstar:
https://www.rockauto.com/en/moreinfo.ph ... 13&jsn=813
An OEM stat and OEM gasket would have set me back $46. Instead I bought the non-OEM AC Delco (it actually had Motorad stamped on it which Rockauto sells for less) and no gasket for $10.