#1 Should I use Hylomar blue or Toyota FIPG on the gaskets?
#2 Do the new style gaskets need to be cut? Got mine from SNG Barratt. Seem to fit perfectly.
#3 Are the Cometic gaskets that much better? I know with head gaskets you can't get a better gasket.

New style gasket as pictured purchased from SNG Barratt has a thickness of:

3/32" or 2.5 MM

 

Memory, oops, and its been Years.

The one piece are a direct fit, and were???? a Pink colour cardboard. Retightening, VERY CAREFULLY a few hours after running IS required. NO Gorilla Tight, just common sense as teh gasket material settles. Then a check over every couple of years.

I use RTV as a "smear dressing", simply coz I have no Hylomar.

#3 NO idea, the words dont gell. The OE were a Tan Biscuit colour and 12 pieces, then there were Green single, then the Pink. All rather thick, never measured, why?, and that is the last I used, as I said many, many years ago.

 

I got a one piece set of gaskets in the mail, light green, and against ideal I cut mine and fit them individually. Reason, the one piece seemed to create a space between the underside of the gasket and areas of the engine around plugs and what not, lots of EXTRA crevasses - spaces that I thought I would want to clean. Lol, I haven't done much cleaning over these months and year +. It sounded good at the time though.

I didn't use a silicone sealant as I read somewhere (and I have no idea how true it is) that fumes (initially) from silicone gasket maker can FRY O2 sensors...??? I dunno.

And yes, thanks to sage words, I did go back and snug down bolts, and they did need it. All has been good since.

 

Gasket dressing: I discoverd this stuff from a post on the forum some years ago. Believe me it is magic. Wherever I have used it the joint has been bone dry. The bottom of my diff casing is actually slightly rusty, for example!

https://www.gasgacinch.com

Both surfces bone dry and clean. Apply stuff ot both surfaces of the joint AND both sides of the gasket.

 

I have used both Hylomar Blue and the Toyota gasket dressing in the past and most recently Hylomar on my XJ6 4.2 cam covers and not a single leak. If I did so on the 6.0 intake gaskets as pictured it would mean I would have to remove the left intake as I have already installed and torqued that side. Easier to remove at this point, so maybe worth it. Agreed with retorquing, even after just an hour the thick gaskets had "settled" and took a little more torque.

 

Greg,

I'm interested in trying that product on your recommendation. Does it harden on contact? When things are dismantled, do they come apart easily or are the gaskets or residue left stuck on the metal surfaces?

Cheers

Paul

 

Hylomar Universal Blue was originally developed in the 1960's by Rolls-Royce Plc to help seal against synthetic lubricants that were used in early jet engines. Yeas ago this original Hylomar formula was commonly known as either PL32 L, M or H (Light, Medium or Heavy grade).

Hylomar is impervious to oil, gasoline, glycol and other engine fluids. Hylomar is oxygen-sensor safe, seals gaps .01" or less, and performs at constant temperatures up to 600°F. With Hylomar, components are assembled, reused and reassembled with ease. Use Hylomar for thin gaps without a gasket or as a gasket dressing. It holds the gasket in place during assembly as well as giving a great seal.

https://hylomar.com/en/universal-blue/

 

The stuff looks like copydex glue, if you are old enough to remember it! On application it stays peelable and useable for several hours, so one can apply it and it does not matter if you take ages before you actually install the gasket. The joint it is used on comes apart very easily and it is also very easy to remove from the metal surfaces, with a bit of a rub with a cloth and maybe some solvent. Nothing like RTV or anything like that which is a total pain to remove.
Also having installed it and you realise you have forgotten something vital inside, for example, it comes apart very easily even after a few hours.
Highly recommended and astonishingly cheap. I have also used in on my Ferguson tractor and have made that very oiltight with it, which I never could before whatever I tried.

 

I ended up installing the intake gaskets dry. I did have to retorque them twice and then a third time for good measure, but the car eventually ran fine once the computer relearned everything.