Heads need rebuilt! Any tips?

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LaGrasta
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Heads need rebuilt! Any tips?

Post by LaGrasta »

MY 246k '98 still runs fantastic and serves multiple purposes for our family. I've been chasing a poor idle for awhile and finally gave up and took it to a mechanic I trust. He ran diagnostics, then a compression test. #4 cylinder is low, valves are bad.
I checked machine cost in the SoCal area, $300/pair. Gasket set is about $100. I guess I'll tackle this; unbolt, have machined, bolt back on. Anything more I should know?
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
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MountainManJoe
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Re: Heads need rebuilt! Any tips?

Post by MountainManJoe »

LaGrasta wrote: Thu Jul 28, 2022 3:16 pm#4 cylinder is low, valves are bad.
if one cylinder is going out, then ....
how many miles on it?
LaGrasta wrote: Thu Jul 28, 2022 3:16 pm$300/pair
per pair of what ... valves? You're not going to do just one cylinder are you?
LaGrasta wrote: Thu Jul 28, 2022 3:16 pmGasket set is about $100.
you're talking about a top end rebuild + kit + machining. To the restore just the top end you could be looking at thousands of $ .... On an old engine block that may be on its way out ...
I would have a serious think about it.
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Re: Heads need rebuilt! Any tips?

Post by LaGrasta »

For $300, the machine shop will rebuild both heads. The heads/engine/van have 246k.
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
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MountainManJoe
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Re: Heads need rebuilt! Any tips?

Post by MountainManJoe »

well that's a reasonable price.
But I'm suspicious about why the valves would be bad. And how's the rest of the engine ... piston rings, crank bearings etc. ... and the transmission...
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LaGrasta
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Re: Heads need rebuilt! Any tips?

Post by LaGrasta »

everything else is 100%, runs fantastic and is super dependable.
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
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Topic author
LaGrasta
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Posts: 724
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Re: Heads need rebuilt! Any tips?

Post by LaGrasta »

I may run some valve cleaner through it on a long drive, maybe that will be enough.
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
User avatar

Topic author
LaGrasta
I sleep in my van
Posts: 724
Joined: Fri Jan 19, 2007 2:07 pm
Location: Mission Viejo, CA
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Re: Heads need rebuilt! Any tips?

Post by LaGrasta »

We sold it to a Texas couple that doesn't have to smog it, $5800. They drove straight from our SoCal home to Las Vegas, then up to Colorado! We're gonna miss that one! We owned it since new, October of 1997.
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
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MountainManJoe
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Re: Heads need rebuilt! Any tips?

Post by MountainManJoe »

Well you had a good run. Are you replacing it?
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LaGrasta
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Re: Heads need rebuilt! Any tips?

Post by LaGrasta »

No plans for replacement. Although I already have a few needs for a van, lol.
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
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