Outer head bolts go thru water jackets??

gp001 · 08-21-2001, 04:44 PM

Do the outer head bolts go through the water jackets????? I've only built 1 5.0 (this one) and don't remember.

8850 · 08-21-2001, 06:38 PM

Yes, they go through and will leak if you don't use thread sealer.

------------------
88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.516 @ 126.27, 60' = 1.446 http://xs-fx.com/raughammer/larrysample.htm

PrplMonster · 08-21-2001, 08:34 PM

Use RTV on the outter head bolts. It acts like moly-lube, yet seals..

.dave

PKRWUD · 08-22-2001, 01:27 AM

DO NOT use RTV. Use thread sealer. RTV will affect your torque readings, thread sealer will not. If you can find it, get ARP Thread Sealer. Best stuff there is.

Take care
~Chris

P.S. Those of you who have used RTV, be prepared to blow a head gasket.

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

[This message has been edited by PKRWUD (edited 08-22-2001).]

WADS56 · 08-22-2001, 02:12 AM

Quote:

Originally posted by PKRWUD:
DO NOT use RTV. Use thread sealer. RTV will affect your torque readings, thread sealer will not. If you can find it, get ARP Thread Sealer. Best stuff there is.

Take care
~Chris

P.S. Those of you who have used RTV, be prepared to blow a head gasket.

If you have studs how could you get a false torque reading when using rtv?

------------------
NA 347 W/ stage 2 Canfield heads, out of the box Victor 5.0 intake, solid roller cam, Aeromotive fuel system.
MY CAR http://www.mustangworks.com/cgi-bin/...splay.cgi?1288

PKRWUD · 08-30-2001, 03:57 PM

Quote:

If you have studs how could you get a false torque reading when using rtv?

The gentleman was inquiring about bolts, not studs. Sorry for your confusion.

Take care
~Chris

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

blown89saleen · 08-31-2001, 01:46 AM

get the arp thread sealer its the ONLY thing to use IMO

------------------
89 saleen 492>vortech s-trim,tfs tw heads,tfs stage1 cam,frpp 1.6rr,cobra u/l,accufab 70mm tb,75mm bullet,30lb. inj,msd 6btm,taylor"409",ron davis rad,mk VIII fan,130A alt,mac long tubes,mac prochamber,mac cat back,tremec 3550,center force df,pro 5.0 shifter,3.55,mac rear control arms,tokico illumina struts&shocks,hitchkis c/c plates>low 12's@121 before the power pipe

Mach 1 · 08-31-2001, 04:38 AM

I cant remember exactly for sure, but Im almost positive I didnt use ANYTHING on my head bolts that were in the water jackets, and I havent had a leak yet, been almost 4 years since I bolted the heads on, so I wouldnt worry to much about it.

ALS85GT · 08-31-2001, 08:49 AM

I would agree w/Mach 1. I've rebuild serveral motors and never used thread sealer.And they haven't leaked,. I'm sure that thread sealer might be good insurance though. My 2 cents..

LX XLR8R · 08-31-2001, 10:26 AM

as far as i seen it is a necesity on studs mine had little bubbling from them so i took it off and used sealer and its fine now

------------------
1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

Capri306 · 08-31-2001, 02:19 PM

According to Haynes, Chilton's, and even the Ford book, you must use thread sealant (outer bolts only) on later model 5.0's. Why wouldn't you even if it WAS just a mild insurance policy? Haven't any of you guys looked into the bolt holes on a 5.0 block? There's the water jacket right there! Hence the rust on some bolts when removing the factory originals. Even when using studs I would highly recommend sealant, and NOT RTV. That stuff is pure evil IMHO, and has absolutely no place in a well-built engine...unless you like gasket failure as stated above.

The ARP stuff is the way to go. In some racing applications, they are using what's called Hylomar for head bolts, but then again they're only used for one run then thrown out. I'd call up Permatex before using that or the PST they manufacture. But why risk it? Just use the ARP stuff.

------------------
Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch

PKRWUD · 09-01-2001, 02:05 AM

It really is a no brainer. Thread sealer is cheap and easy to apply, insures against leaks, acts as a thread protectant similar to anti-seize and won't affect torque readings now or later, like RTV and corrosion/rust will. If you're in a pinch, or on a desert island, don't sweat the small stuff. HeII, you could probably use bailing wire and electrical tape for spark plug wires if you were desperate, but if you're not, then why? If thread sealer is available, use it! It's not like it's any more effort (unless you develop a leak or a frozen bolt because you didn't use it!).

Take care
~Chris

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

08-21-2001, 04:44 PM	#1
gp001 Registered Member Join Date: Nov 2000 Location: So. Cal. Posts: 244	Outer head bolts go thru water jackets?? Do the outer head bolts go through the water jackets????? I've only built 1 5.0 (this one) and don't remember.

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08-21-2001, 06:38 PM	#2
8850 Registered Member Join Date: Nov 1998 Location: Sugarland, TX USA Posts: 161	Yes, they go through and will leak if you don't use thread sealer. ------------------ 88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.516 @ 126.27, 60' = 1.446 http://xs-fx.com/raughammer/larrysample.htm

08-21-2001, 08:34 PM	#3
PrplMonster Registered Member Join Date: Mar 1999 Posts: 88	Use RTV on the outter head bolts. It acts like moly-lube, yet seals.. .dave

08-22-2001, 01:27 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	DO NOT use RTV. Use thread sealer. RTV will affect your torque readings, thread sealer will not. If you can find it, get ARP Thread Sealer. Best stuff there is. Take care ~Chris P.S. Those of you who have used RTV, be prepared to blow a head gasket. ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!! [This message has been edited by PKRWUD (edited 08-22-2001).]

08-31-2001, 01:46 AM	#7
blown89saleen Registered Member Join Date: Aug 2001 Location: oxford,pa Posts: 2	get the arp thread sealer its the ONLY thing to use IMO ------------------ 89 saleen 492>vortech s-trim,tfs tw heads,tfs stage1 cam,frpp 1.6rr,cobra u/l,accufab 70mm tb,75mm bullet,30lb. inj,msd 6btm,taylor"409",ron davis rad,mk VIII fan,130A alt,mac long tubes,mac prochamber,mac cat back,tremec 3550,center force df,pro 5.0 shifter,3.55,mac rear control arms,tokico illumina struts&shocks,hitchkis c/c plates>low 12's@121 before the power pipe

08-31-2001, 04:38 AM	#8
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	I cant remember exactly for sure, but Im almost positive I didnt use ANYTHING on my head bolts that were in the water jackets, and I havent had a leak yet, been almost 4 years since I bolted the heads on, so I wouldnt worry to much about it.

08-31-2001, 08:49 AM	#9
ALS85GT Registered Member Join Date: Aug 2001 Location: Miami, Fl, USA Posts: 69	I would agree w/Mach 1. I've rebuild serveral motors and never used thread sealer.And they haven't leaked,. I'm sure that thread sealer might be good insurance though. My 2 cents..

08-31-2001, 10:26 AM	#10
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	as far as i seen it is a necesity on studs mine had little bubbling from them so i took it off and used sealer and its fine now ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

08-31-2001, 02:19 PM	#11
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	According to Haynes, Chilton's, and even the Ford book, you must use thread sealant (outer bolts only) on later model 5.0's. Why wouldn't you even if it WAS just a mild insurance policy? Haven't any of you guys looked into the bolt holes on a 5.0 block? There's the water jacket right there! Hence the rust on some bolts when removing the factory originals. Even when using studs I would highly recommend sealant, and NOT RTV. That stuff is pure evil IMHO, and has absolutely no place in a well-built engine...unless you like gasket failure as stated above. The ARP stuff is the way to go. In some racing applications, they are using what's called Hylomar for head bolts, but then again they're only used for one run then thrown out. I'd call up Permatex before using that or the PST they manufacture. But why risk it? Just use the ARP stuff. ------------------ Capri306, Moderator, The Mustang Works Online 1979 Mercury Capri, 5.0L -- C4 -- 2.73 1987 Mustang LX Notch

09-01-2001, 02:05 AM	#12
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It really is a no brainer. Thread sealer is cheap and easy to apply, insures against leaks, acts as a thread protectant similar to anti-seize and won't affect torque readings now or later, like RTV and corrosion/rust will. If you're in a pinch, or on a desert island, don't sweat the small stuff. HeII, you could probably use bailing wire and electrical tape for spark plug wires if you were desperate, but if you're not, then why? If thread sealer is available, use it! It's not like it's any more effort (unless you develop a leak or a frozen bolt because you didn't use it!). Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!