I also agree with Rick about tearing the engine down unless it’s necessary. Longevity is one of these motors greatest traits. You’ll have enough work and money invested without trying to match factory reliability with a rebuild.
Never below 32.5, never higher than 36.6, hand calculated with a multiplier derived from running GPS for over 1000 miles.
29,000 miles and those figures have held true. I’ll agree, it’s boasting, but it’s also a fact.
It also is primarily a road truck but does see some occasional beatings
When I brought my Tahoe home from Florida back in ‘09 I ran in a pack of 3-5 vehicles much of the way. We ran between 80 and 90 much of the way (except at night through the mountains of Tennessee, the truck on my a$$ probably wanted me to).
Anyway, things went well until I noticed a car parked...
For comparisons sake, mostly 10-20f normally. -10 to 10 f for short stretches. Colder than -10 uncommon but not unheard of.
We have three ALH’s on the road, only my Jetta has any type of issue starting subzero. It has one stuck glow plug not working that I’ve not bothered to get out. Not worth...
Went back to look, just what I said in a condensed form. If you want to try it and feel confident about, go ahead. It would be interesting how it affects the tune.
If your only reason is cold starts, I would think making sure everything that affects that is in proper order. How cold of starts...