I am putting a new oem toyota manifold gasket on for the 2f. I was wondering if i should put this on dry since it is metal or should i use any other sealant? I would say dry but it doesn't hurt to be curious. thanks
oem exhaust manifold gasket dry or sealant
- Thread starter scrowley
- Start date
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I put in a dry OEM gasket after my rebuild and it blew out in 3 years. I've replaced it with a Fel-pro gasket and a spray copper sealant with much better results. I'd do a search on the Fel-pro gaskets and read up on it and if nothing else use permatex spray or paste copper sealant on your OEM gasket.
Apply Copper Paste Sealent around the Exhaust ports.
Mudfolk commonly recommend FelPro or Remflex for the manifold gasket. Don't be bashful with the Copper Coat - apply liberally to both sides of the gasket and the mating surfaces of the head and manifolds. There are lots of threads here on that subject for reference.
Good luck
Butt
Good luck
Butt
Copper coat or nothing
I recently did the I/E gasket job on the 2F. Since I didn't have a local machine shop willing to plane the setup for less than $150 , I decided to go with the doulble FelPro. I used the copper gasket paste. I applied a thin layer to both sides of both gaskets and allowed this to cure overnight. Then during assembly, I applied a second thin layer around each port on the outer gasket. Used blue permatex threadlocker. Torqued the snot out of it! ~50 ft. lbs. Retorqued them about 15 hot/cold cycles later. Not saying this is the magic song and dance or anything, just what I came up with after doing a lot of reading on here.
It has only been a about a month, but everything is holding up great. Best of luck!!!
It has only been a about a month, but everything is holding up great. Best of luck!!!
- Thread starter
- #8
looks like ill go with the copper seal spray. where is this available? pref. without ordering. thanks
Advance auto parts
Use LOCTITE 37583 9oz Aerosol Copper Gasket Adhesive when you need a fast drying metallic copper sealant that helps dissipate heat prevents gasket burnout and improves heat transfer. Seals instantly. Fills hot spots and surface imperfections
- Thread starter
- #11
Is the loctite proven to be better or are they basically the same product??
I've always used the OEM gasket and some copper hi temp sealant around each port. I have since started using the Remflex gaskets and they recommend not using any type of sealant because the sealants temperature range is much lower than their graphite material. If I recall correctly the Permatex hi-temp sealant has a high end rating of 500-700 degrees where the Remflex graphite is rated to 3000 degrees. I have run several Remflex gaskets dry and have not had one leak yet. That said, if you're cylinder head is anywhere near 500-700 degrees you're leaking gasket will be the least of your worries
. Exhaust gases on the other hand, average well above 700 degrees, reaching temps from 1200-1400 degrees under heavy loads and get the exhaust manifold much hotter than the head. These temps can destroy a sealant. This is only a concern, obviously, on the exhaust side as even boosted intake air only hovers around 250-350 degrees. Long story short, as long as the hot exhaust gases don't touch the sealant, or enough heat is dissipated before reaching the sealant you're fine. I've never measured the exhaust manifold temperature on a 2f, but if it gets over 500-700 degrees (which headers most often do) the sealant is pretty much worthless. This may be one of those real world experience vs. theory arguments but it is food for thought.
. Exhaust gases on the other hand, average well above 700 degrees, reaching temps from 1200-1400 degrees under heavy loads and get the exhaust manifold much hotter than the head. These temps can destroy a sealant. This is only a concern, obviously, on the exhaust side as even boosted intake air only hovers around 250-350 degrees. Long story short, as long as the hot exhaust gases don't touch the sealant, or enough heat is dissipated before reaching the sealant you're fine. I've never measured the exhaust manifold temperature on a 2f, but if it gets over 500-700 degrees (which headers most often do) the sealant is pretty much worthless. This may be one of those real world experience vs. theory arguments but it is food for thought.
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