Should I tighten the head-bolts??
Thread Starter
Junior Member
Joined: Sep 2000
Posts: 62
Likes: 0
From: Finland
Car: GTA '88
Engine: 420 Dart SHP
Transmission: T-56
Should I tighten the head-bolts??
I removed the heads and ported/matched and changed valve springs/all seals about 2 years ago.
But I never tightened the head bolts after torquing them at the installation. No leaks and everything's been running fine.
Just finished installing new cam/headers/cat-back. Should I re-tighten the head-bolts? I mean isn't there much more pressure (and hp) since i have a different cam and other mods?
Mods in sig.
Thanks
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-88 GTA 305TPI/T5, 3.45 posi, Crane cams 2032, Edelbrock TES #6872, 3" cat-back, ported+portmatched heads, base, plenum, multiangle valve job, no cat, no air, Haltech E6GM ECM. http://www.helsinki.fi/~kjilehto
But I never tightened the head bolts after torquing them at the installation. No leaks and everything's been running fine.
Just finished installing new cam/headers/cat-back. Should I re-tighten the head-bolts? I mean isn't there much more pressure (and hp) since i have a different cam and other mods?
Mods in sig.
Thanks
------------------
-88 GTA 305TPI/T5, 3.45 posi, Crane cams 2032, Edelbrock TES #6872, 3" cat-back, ported+portmatched heads, base, plenum, multiangle valve job, no cat, no air, Haltech E6GM ECM. http://www.helsinki.fi/~kjilehto
Senior Member
Joined: Feb 2000
Posts: 769
Likes: 0
From: Stillwater, OK
I think you'll be fine. But it doesn't hurt to check torque on them with a torque wrench, just stay the same as you did before.
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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with B&M 3000 stall, Powertrax NoSlip Locker, 4.11 gears.
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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with B&M 3000 stall, Powertrax NoSlip Locker, 4.11 gears.
Joined: Jan 2001
Posts: 285
Likes: 14
From: the sticks of NJ...
Car: 89 Firebird Formula
Engine: 389
Transmission: T56
Axle/Gears: Moser 4.11
What kind of head gaskets did you put on?
Most of the good ones are the no-retorques.
Not a bad idea to recheck em anyway, like Polecat said.
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89 Firebird Formula
WS6 package,ZZ4 Crate engine
SLP 58MM TB, Edelbrock TES Headers
Random Tech 3" cat, SLP 3" stainless exhaust
9 bolt rear, Hotchiss swing arms, Lakewood panhard rod
Corvette 2/4 servo, kevlar band, full poly rear.
Centerline 16x8 rims, B.F Goodrich drag radials
Most of the good ones are the no-retorques.
Not a bad idea to recheck em anyway, like Polecat said.
------------------
89 Firebird Formula
WS6 package,ZZ4 Crate engine
SLP 58MM TB, Edelbrock TES Headers
Random Tech 3" cat, SLP 3" stainless exhaust
9 bolt rear, Hotchiss swing arms, Lakewood panhard rod
Corvette 2/4 servo, kevlar band, full poly rear.
Centerline 16x8 rims, B.F Goodrich drag radials
Thread Starter
Junior Member
Joined: Sep 2000
Posts: 62
Likes: 0
From: Finland
Car: GTA '88
Engine: 420 Dart SHP
Transmission: T-56
the head gaskets were no-retorques (fel-pros), guess I can belive what they say.. I'm still going to check em. Thanks!
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-88 GTA 305TPI/T5, 3.45 posi, Crane cams 2032, Edelbrock TES #6872, 3" cat-back, ported+portmatched heads, base, plenum, multiangle valve job, no cat, no air, Haltech E6GM ECM. http://www.helsinki.fi/~kjilehto
------------------
-88 GTA 305TPI/T5, 3.45 posi, Crane cams 2032, Edelbrock TES #6872, 3" cat-back, ported+portmatched heads, base, plenum, multiangle valve job, no cat, no air, Haltech E6GM ECM. http://www.helsinki.fi/~kjilehto
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