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head gasket ?
Anyone know the best head gasket to use on a 454 gen 1V with dart aluminum heads around .040 thick
Usually use fel pro but can't find proper # Any input would be appreciated |
17042 fel pro
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Make sure you put the headgasket on the head first and make sure that the wire ring does not hang over the combustion chamber on the head.
Many aftermarket heads require a 'bigger bore' headgasket than you'd think. Most don't check against the head, which , again,not doing so is a 'No, No' with todays aftermarket heads as most heads combustion chambers are designed for bigger bore motors. |
Mike thanks for the input
That # comes up as the economy gasket was looking for the best gasket I can get Dart recommended Fel pro # 1037 But that requires drilling two holes in the bottom of the block for coolant passages, and the two upper side holes are not in the gasket , not sure why? Not too comfortable with doing that. also forgot to mention this is a 525 sc engine |
Every 525 sc I've seen was a gen 5. Good to know on that gasket number.
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Originally Posted by actionmarineguy
(Post 4233040)
Mike thanks for the input
That # comes up as the economy gasket was looking for the best gasket I can get Dart recommended Fel pro # 1037 But that requires drilling two holes in the bottom of the block for coolant passages, and the two upper side holes are not in the gasket , not sure why? Not too comfortable with doing that. also forgot to mention this is a 525 sc engine |
Mark IV should be 17046. Great gaskets
http://www.jegs.com/i/Fel-Pro/375/17046/10002/-1 |
Originally Posted by Rookie
(Post 4233076)
Mark IV should be 17046. Great gaskets
http://www.jegs.com/i/Fel-Pro/375/17046/10002/-1 |
#1071 if you want MLS
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Originally Posted by mike tkach
(Post 4233085)
im not sure but i think he has a gen5 block.
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the hot dog king of chicago,but he,s gone.
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Originally Posted by Rookie
(Post 4233076)
Mark IV should be 17046. Great gaskets
http://www.jegs.com/i/Fel-Pro/375/17046/10002/-1 Fel-Pro Loc Wire gaskets are engineered to provide the best sealing available for severe applications. They have oversized wire rings that lock into receiver grooves which must be machined into the cylinder heads. Precise machining is critical to the success of these gaskets. *Each Fel-Pro gasket type is sold 1 per package Mike was rite,,the 17042 is what you want to use on your engine..i would also buy a set of head studs ..studs make a true torque spec so every stud/nut has the same load..a head bolt will vary in uneven load to the cylinder head.. |
I could be wrong but I don't believe the 17046 are Loc Ring,
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Originally Posted by abones
(Post 4233163)
I could be wrong but I don't believe the 17046 are Loc Ring,
Fel-Pro 17046 - Fel-Pro Wire Ring Cylinder Head Gaskets Fel-Pro 17046 - Fel-Pro Wire Ring Cylinder Head Gaskets Fel-Pro#375-17046 Steel Wire Ring Head Gasket Big Block Chevy Mark IV Marine 4.370" Compressed thickness .039" Compressed volume 9.7cc FREESHIPPING & HANDLING! $47.99 Order Today Ships 01/01/15 Online Price Match Add to Wish List Overview Fel-Pro 17046 - Fel-Pro Wire Ring Cylinder Head Gaskets Fel-Pro wire ring head gaskets are offered in various bore sizes, thicknesses, and materials to meet any need. Fel-Pro head gaskets are designed to be relied on by the professional racer as well as the Sunday cruiser when it comes to sealing combustion pressure, coolant, and oil under all conditions. Pre-Flattened Steel Wire Ring Head Gaskets The strength of steel wire sealing with minimum brinelling of aluminum heads. Pre-Flattened Copper Wire Ring Head Gaskets Copper will not brinell aluminum heads, and these Fel-Pro gaskets also offer superior heat dissipation from combustion hot spots. Loc Wire Ring Head Gaskets Fel-Pro Loc Wire gaskets are engineered to provide the best sealing available for severe applications. They have oversized wire rings that lock into receiver grooves which must be machined into the cylinder heads. Precise machining is critical to the success of these gaskets. *Each Fel-Pro gasket type is sold 1 per package |
like I said I don't think it is a Loc Ring, I believe it is a pre flattened steel wire. no need for a receiver groove?
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if not I stand corrected.
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1)The strength of steel wire sealing with minimum brinelling of aluminum heads.
I dont believe he has alumium cylinder heads,the 525 sc were cast iron.. They have oversized wire rings that lock into receiver grooves which must be machined into the cylinder heads. Precise machining is critical to the success of these gaskets. 3) 17046 is for a mark motor not a genV |
the 17046 is for a mark4 block.it comes 3 different ways.1-a pre flattened copper wire.2-a pre flattened steel wire.3- a locking wire ring that requires a reciever groove.i personally would never go with option 3,if i was build an engine with high cylinder pressure i would go with a mls gasket.if a nitrous or blown alcohol engine i would entertain a copper gasket with a o ring and a reciever groove.
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Originally Posted by mike tkach
(Post 4233197)
the 17046 is for a mark4 block.it comes 3 different ways.1-a pre flattened copper wire.2-a pre flattened steel wire.3- a locking wire ring that requires a reciever groove.i personally would never go with option 3,if i was build an engine with high cylinder pressure i would go with a mls gasket.if a nitrous or blown alcohol engine i would entertain a copper gasket with a o ring and a reciever groove.
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3 Attachment(s)
Got the two gaskets I thought might work.Turns out the 1037 and the17046 are the same gasket the 17046 is just labeled marine on the package
Came with these instructions. Has anyone done this and had no cooling isues these gaskets also have only one hole in the side the other is blocked off. By the way it is a gen 4 block I replace the gen 5 that it had. thanks Guy [ATTACH=CONFIG]534219[/ATTACH][ATTACH=CONFIG]534220[/ATTACH][ATTACH=CONFIG]534221[/ATTACH] |
I believe the larger bore version is the same way. 1047 is the same as the marine 17048 gasket just different packaging
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If using the 17046/48 style gasket I recommend spraying the gasket with Hi-Tack. It seems to help with sealing the lower water passages and there's less seepage down the side of the block.
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i have used the 17046 many times with great results.i never use any sealant on them.just stating my experiance.
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Originally Posted by Panther
(Post 4233981)
If using the 17046/48 style gasket I recommend spraying the gasket with Hi-Tack. It seems to help with sealing the lower water passages and there's less seepage down the side of the block.
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Still no answer?
Called cometic, they said the same gasket is used on all 3 gen of big blocks with no modifications, I don't see how that can be Also checked the head contact at fire ring, Good tip.Thanks |
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Thanks
But still not sure if you have to drill holes in block or not? as described by fel pro All gaskets I find have either one hole or two holes in the end of the gasket for the mark IV All new gaskets have holes between the cylinders under the head bolts where they tell you to make the hole My old gaskets had two holes on the end and No holes under the head bolts between the cyl. My best guess is to make the holes in the block as described by fel pro. Hope this is not a mistake |
I have mark iv blocks with dart aluminum heads. I never drilled any holes. I've used the felpro 1071-1 , cosmetic C5329-050, and victor reinz solicor head gaskets on these engines with no issues.
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drilling of the 3 lower holes is for really early blocks.very noticeable when the head gaskets are put on.
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but why must holes be drilled? the engine ran and had acceptable coolant flow without the 3 holes. just cuz there are holes in the gasket shouldn't make any diff. i could see making extra hole in the gasket for a cooling passage already in existence in the block-head. is there even a hole in the head that would flow through to the block hole?
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Originally Posted by dereknkathy
(Post 4236757)
but why must holes be drilled? the engine ran and had acceptable coolant flow without the 3 holes. just cuz there are holes in the gasket shouldn't make any diff. i could see making extra hole in the gasket for a cooling passage already in existence in the block-head. is there even a hole in the head that would flow through to the block hole?
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Going with the fel pro 1071 gaskets, look like the best choice
Thanks for all the info. |
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