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So,I did not wait for my Rebuilder to send a guy,Long story, I pulled the starboard head (leaking one) first, All the head bolts inside the valve cover torqued tight, the exterior eight bolts very loose compaired to the internals, Pulled the port head ..ALL BOLTS INTERNAL AND EXTERIOR TORQUED EQUALLY? HEAD gaskets are FEL-PRO MARINE HI -Performance!, [i]Do ya think he just missed torquing the outer bolts?? I noticed on these gaskets that the upper water passages from the block are only a 1/4 " hole, this blocks the water passage 90% ?? Engine is a GEN VI, 502/540 Are these the correct head gaskets ????? I cleaned all the snots out of the cylinders and spun the motor by hand, rolled over smooth and easy...Pics attached..thanks Dave..I need volunteers to help re-assemble and set the Vaves..aaa ..Tim..SKramer !!
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07-18-2009 05:20 PM
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07-18-2009 05:53 PMI've never seen a whole row of head bolts loosen up.
The FelPro gaskets require a retorque after bringing the engine up to operating temperature. If you don't they'll most likely leak. They put the little instruction slip in every head gasket package. But for used gasket surfaces they seal about the best.
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07-19-2009 07:43 AMSounds like the reasonable conclusion.
When you say loose, like you could have removed them with a regular length 3/8 drive socket wrench?
And if so, the entire head would not have been torqued because of the torque sequence they would have followed.Getting bad advice is unfortunate, taking bad advice is a Serious matter!!
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07-20-2009 10:47 AM
I have never retorqued Fel Pro head gaskets and I have put a lot of them on. I torque to just over 80lbs because I know I'm not going back. Never had one loosen up. I have taken head bolts out with a 3/8 ratchet and a deep socket. Couldn't find the 1/2 deep socket that fit and I was in a hurry. It took a big hammer and the socket broke near the end of the job. If any headbolts were that loose, they were not torqued right in the first place.
Big boats rule!
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07-20-2009 01:31 PM
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07-21-2009 08:36 AM
Wow Dave. Sorry to hear that. That's a huge mistake if he forgot to torque the head bolts. In fact, I can't think of a bigger blunder. Can you say "Engine Building 101". Have you talked to the builder?
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07-21-2009 09:17 AM
I have ran them without a retorque without problems, but I usually do. I think felpro says for "racing applications" they need re torqued. Hell, I was helping a buddy put his mill together and he already had the heads sitting on the block when I got there and the bolts finger tight. We proceeded to torque them down and right after we got finished I looked over and seen the head dowels sitting on the bench. Anyway, we pulled the heads back off and re-used the same gaskets but torqued them to 78 ft/lbs. The engine is still running fine with around 300 hours with no re torque.
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07-21-2009 11:08 AM
Right or wrong, Ive never retorqued either. In my own disturbed mind I didnt think it was a good idea to move the head bolts that have sealer on them due to the water passages they thread into on Mark 4 blocks. I use the 17040 gasket on my Mark 4 454's. oops 17040, that right.
Last edited by ROGUE; 07-21-2009 at 12:19 PM.
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07-21-2009 11:26 AMSome good info here; http://www.cartechbooks.com/vstore/s...6&chapter=7174
048 is right gasket, sorry. 207 is a set.Last edited by Geronimo36; 07-21-2009 at 11:48 AM.
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07-21-2009 07:47 PMWhat kind of heads?
www.merperformancemarine.com
843-399-8785
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07-22-2009 08:35 AM
I just cannot imagine how you miss ALL the lower bolts, especially when using a sequence, I do the normal torque as called for, no more, the threads can pull out of the block and BBC are known for that, I have inserts on a few of mine, they were helicoiled before I rebuilt them, I use a product called BIG SERT, it is a better way to do it.
wish I was going to be around dave, I am leaving for the islands Thursday35 Cigarette Mistress
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07-23-2009 07:40 AM
Full Force... see you at the islands? U going to PIB? BajaCleveland and I will both be there.