92 GMC pickup 4.3 questions
Lp1331 1p1331
over two years ago from the original owner with about 92K. The truck was
pampered and came with a thick stack of receipts for repairs and maint
done over the years. I have had absolutely ZERO problems of any kind
--until now. The cooling system went from nice green coolant to rust
almost overnight. This morning I topped it off and let it run for a few
minutes. Looked in the overflow tank and saw bubbles. I know that
usually means head gasket, but can intake manifold gaskets also cause
that? I know some GM engines had bad problems with them. Is this engine
one of them? It also recently started getting a "check engine" light
intermittantly, and the almost unbelievably great gas mileage-- about
20-- dropped to about 16. There does not seem to be any water in the
oil. I am not driving the truck anymore until I can get it to a friend's
shop, and get it fixed, but I'm just curious, and a little worried. I
love the truck and am going to keep it regardless of what it takes to
fix it-- just wanted some idea what to budget for. As to a previous
thread about 20 year old vehicles-- here's a 19 y/o, and this weekend
I'm going on a 500 mile round trip in my 86 C10 6.2 Diesel-- since the
problem with the other truck. (high school reunion -- shudder -- 40
yrs) . FWIW, I don't see that many new style Tundra's
here, and "here" is San Antonio, where they are made. Don't know anybody
who has one, other than a friend who had a rental while the ins. co. was
settling on his totaled 03? F150. He said he didn't care for it that
much and would never buy one.
Any and all info/advice on the 92 V6 will be greatly appreciated. Thanks
Larry
Steve W.
I would bet you need intake gaskets and probably new O2 sensors as well.
The bubbles were more than likely air being purged out of the engine as
it warmed up, after you topped off the coolant. The color change could
be air or more likely the coolant got low and air in the system formed
some flash rust that colored it.
The bad intake gasket is letting coolant get into the intake runner,
this gets run through and causes the O2 sensors to be contaminated. You
get crappy mileage and a check engine light as well.
Make sure you use the good steel cored gaskets and follow the new torque
specs when you install them.
--
Steve W.
PerfectReign
etcha-a-sketch and scratched out:
> The cooling system went from nice green coolant to rust almost
> overnight. This morning I topped it off and let it run for a few
> minutes. Looked in the overflow tank and saw bubbles.
What steve said.
You have a 17 year old truck with 127K miles. You need new gaskets.
People still use webtv?
--
perfectreign
www.perfectreign.com || www.ecmplace.com
a turn signal is a statement, not a request
Lp1331 1p1331
Hopefully this weekend I can get my neighbor to help me get it to my
friend's garage. I could do the work myself, but my friend need some a/c
work done, which is my trade, so we help each other. About the O2
snsor(s)-- are they rnied? I guess when they are contaminated they
cannot be cleaned? Just wondering-- I really don't care what it costs as
long as it is fixed right. BTW, took the old 86 Diesel on the trip--
not a minutes problem with it and about 22 MPG. HS reunion was
absolutely fantastic!
WebTv is great for usenet and Email and that's about it. It's days are
numbered with me. I would have gotten rid of it sooner but needed to
keep the same Email address for the updates on the reunion. A freind
who messes with computers is getting me one. I had one along with this,
but it was a POS, and finally quit. When I get one I'm gonna call WebTv
and tell them I'll give them $10/mo (or maybe less) for their service
and they can take it or leave it.
Thanks again for the info on the truck Larry