351c head gasket installation tips
Hello. I am in the process of installing rebuilt heads and finishing up a 351c. Are there any tips on ensuring good sealing and putting things back together? Any help is appreciated. The engine is on a stand out of the car.
I'm not a mechanic but I did manage to Re uild my 351w on 1969 mach. I learned the hard way to pay attention to the front marking on the gaskets. The first time they went in wrong and I had an overheating issue but never drastic enough to boil over. After redoing it the right way, the issue was fixed. We used a knock off gasket the first time which had no front markings. We used felpro the second time which had markings. You can't really tell by eye which side of gasket is front unless it is marked.

We prepped by machining the heads, gerting the rocker studs replaced with screw down ones (I had Original pushed in studs that were loose), and then gasket and torque down.
Well I am using felpro and will pay attention to the front written on the gasket. I was curious about any extra sealer during installation thanks for the info
No sealer on head gaskets.
All good advice...also if you never done this before be sure you follow the proper torqueing sequence of the cylinder heads and torque to factory specs in incremental steps. Your shop manual or engine rebuilding manual will outline this for you. If using ARP studs follow the instructions on the package in regards to lubricant and torque specs.
Follow everything everyone else has said. When it comes time to set the intake, clean all surfaces with rubbing alcohol, to remove any traces of oil, lay the side gaskets in place. Throw away the solid rubber end pieces, and lay a 1/4" bead of Ultra Black Silicone by Permatex along the edge of the block between the heads. Then set the intake and torque to specs in the proper sequence, wipe and smooth the excess silicone and you should have a lifetime leakproof seal. Hope it helps JTS 71 Mach1
Ok thank you. What about using "the right stuff" product in place of the silicone? I am going to paint the engine tomorrow.

Attached Files Image(s)
Some things to do are 1) Run a bottom (or plug) tap through all the bolt holes to clean out any grime stuck in the threads. Some people prefer thread chasers instead. 2) It's a good idea to use ARP head bolts. ARP head studs if you want to spend a lot more money but they are certainly not needed. 3) Make sure you can run the bolts all the way down by hand. 4) Follow ARP's torque spec and use their lube on the threads and under the hex head and flat washers. 5) I've had a Fel Pro tech recommend a retorque 30 minutes or so after the initial torque before firing up the engine. To retorque simply one at a time loosen each bolt about 1/4 turn then retighten to the full torque spec. Do this in the pattern of torqueing the bolts. 6) Very important, use a good quality head gasket of the correct type and install it correctly.

Permatex's "right stuff" is a good choice. The stuff holds up better than most sealants. Are those aftermarket valve spring retainers? They almost look like they're installed upside down. GXR
Those valve spring retainers can't be installed upside down. But wow, those are strange. I wonder why those were installed. They almost look like a retainer to drastically reduce the installed spring height.


Possibly Related Threads…
Thread Author Replies Views Last Post
  351c wont start, help My70mach1 71 37,071 12-16-2018, 08:26 AM
Last Post: JTS71 Mach1
  Ford 351C 4-V Marketing Manual Mach 1 Club 7 16,068 02-27-2014, 08:41 PM
Last Post: Mustangmike
  351C Upgrade Carb norcal510 14 22,947 02-27-2014, 02:26 AM
Last Post: djjsc
  Air Flow Test on Finished 351 Windsor Aluminum Head Mach 1 Club 0 4,403 01-06-2014, 05:52 AM
Last Post: Mach 1 Club
  351C addons - OLD MAGAZINE ARTICLE Mach 1 Club 0 5,239 01-06-2014, 04:32 AM
Last Post: Mach 1 Club
  Tips on dropping in a 351c into a 70 Mach 1 Monticore 6 11,978 07-09-2013, 02:20 AM
Last Post: Steven Harris
  351C Stroker Kits & Projects Mach 1 Club 15 26,993 06-29-2013, 03:01 PM
Last Post: furray
  Plastigage, 351C- tolerance help Monticore 6 13,872 09-20-2012, 07:53 AM
Last Post: Monticore
  351C 2V intake seal leak. but why??? travisgm 4 8,875 08-05-2012, 08:05 PM
Last Post: Oztrailer
  351C 2V johnanthony 2 7,367 07-29-2011, 05:02 AM
Last Post: Mach 1 Club

Forum Jump:

Users browsing this thread: 1 Guest(s)
Latest Threads
manteau noir femme
Last Post: RyanTate
Today 02:04 PM
» Replies: 0
» Views: 13
chaussure nike foot
Last Post: RyanTate
Today 02:00 PM
» Replies: 0
» Views: 18
puma rs x toys
Last Post: RyanTate
Today 01:57 PM
» Replies: 0
» Views: 10
Been Awhile... '71 Rustang
Last Post: Mister 4x4
Today 10:42 AM
» Replies: 176
» Views: 208511
Pulling the motor
Last Post: JTS71 Mach1
Yesterday 07:40 AM
» Replies: 7
» Views: 139
Fuel pump & carb replacement
Last Post: Tom W
07-07-2020 08:41 PM
» Replies: 5
» Views: 165
The 2021 Ford Mustang Mach 1 Is Back Wit...
Last Post: JTS71 Mach1
07-07-2020 09:31 AM
» Replies: 5
» Views: 381
1969 Mach1 Parking light socket with wir...
Last Post: JTS71 Mach1
07-07-2020 09:29 AM
» Replies: 1
» Views: 88
Ford unveils 2021 Mustang Mach 1
Last Post: Mister 4x4
07-06-2020 06:17 AM
» Replies: 2
» Views: 653
Happy Father's Day
Last Post: JTS71 Mach1
06-22-2020 01:24 AM
» Replies: 0
» Views: 275
2021 Ford Mustang Mach 1 builds a bridge...
Last Post: Mach 1 Club
06-17-2020 01:20 AM
» Replies: 0
» Views: 565
Daddy's Home!
Last Post: JTS71 Mach1
06-09-2020 12:05 PM
» Replies: 0
» Views: 3126
Need paint match advise from expert auto...
Last Post: Mustangmike
06-07-2020 11:55 PM
» Replies: 2
» Views: 1031
Tool Kit Suggestions
Last Post: AGON123
06-05-2020 05:55 PM
» Replies: 25
» Views: 36966
Spark plugs
Last Post: JTS71 Mach1
05-28-2020 02:45 AM
» Replies: 11
» Views: 2691
Memorial Day
Last Post: JTS71 Mach1
05-26-2020 04:47 AM
» Replies: 0
» Views: 1416
WTB 69-70 Fastback Quarter Window Latch ...
Last Post: SWPruett
05-19-2020 11:11 AM
» Replies: 2
» Views: 1424
Heater Box Question
Last Post: bob.harlan
05-18-2020 02:23 AM
» Replies: 2
» Views: 1356
Last Post: JTS71 Mach1
05-17-2020 05:44 AM
» Replies: 0
» Views: 2939
Why I'm in Love with my car
Last Post: carmans69
05-01-2020 03:19 PM
» Replies: 5
» Views: 1976