apc

Did Toyota design the placement of the 3vze starter too close to the exhaust header? I recently changed my starter out to a Napa unit and my battery to a yellow top Optima. Yesterday was the only day this year it has gone over 30 degrees C (87 degrees F) here and the 4runner would not start. Click, click.

I bump started the rig and drove it into the garage. 5 hours later, I went out and it started as normal; did this about 10 times.

My thought is the heat from the exhaust expanded something in the starter to no make a connection.

Any thoughts?

94x4

The position of the starter in relation to the exhaust manifold has never been a reported problem as far as I know.
I'd suggest checking your connections on that newly replaced starter.

mtnfreak

Check your starter relay. Are you getting enough juice to the starter? I've got an automatic - no relay and had to add one because the starter wouldn't turn when it was hot out.

4Crawler

iTrader: (3)

It is not uncommon for new (rebuilt) starters to have problems internally. Also could be a wiring/relay/switch problem in your truck, have a look at this page for some ideas:

http://www.4crawler.com/4x4/CheapTricks/Starter.shtml

justanother4x4

before blaming the starter, i would check the grounds