I have a '79 K5 Blazer I bought about 6 months ago, it runs good, just a
few minor issues I want to deal with.
This truck was born with a 305 engine in it. It now has a 350 with rv cam.
which lead to the following problems:
1. vacuum operated heat riser valve. This is currently connected directly to
manifold vacuum instead of the tvs.
Does the vacuum hold this valve open or closed? My stupid hanes manual
has a typo in it that basically states
that the vacuum both opens and closes the valve. I've tried both
positions, but there dosen't seem to be much of a difference.
2. throttle valve cable. It is an inch too short to fit on the throttle
lever. Do these things come in different lengths, or do they
have different brackets for different engine/ carb configurations? (I
have a quadrajet 4mv.) I'm thinking I'll just hack the bracket.
It burns oil on startup, much more so when cold, but it clears up fairly
quickly. Is that usually valve guides, rings, or a combination
What type of oil is best? I used 5w30 in the winter, 10w30 for summer. or
should 5w30 year round?
The transfer case is a np203, but the front axle has locking hubs. I'm not
sure weather the hubs were installed in order to run
in 2wd with the tcase in hi-loc or weather the entire front axle was
swapped. I've read that the locking mechanism on the np203
was weak, so I've just been driving it in hi. It is hard to shift into the
"loc" positions. Is that a sign of trouble to come, or is it more
likeley the linkages?
Lastly, What guage sheet metal is used on the chevy trucks? I'm going to
replace the rockers, and rear fender sections, but there are
couple of places where I could just weld some paches in.
thanks in advance,
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