RTV in place of LIM gasket ok?
S5 t2, I know I need the big rubber seals for the coolant holes, but is it ok to use RTV in place of a paper gasket? I dont have another gasket to use.
Thanks Mike |
my friend did that to his UIM, it sealed just fine. The problem came when we tried to take it off, after unbolting it, we spend a good 3hrs trying to pry it off.
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Yeah I just said the hell with it and bought all new gaskets from mazdatrix and overnighted them cause I need my car up and running. I wasn't 100% sure that the LIM to engine coolant seals were good, since that was the reason I pulled it off, it was leaking pretty bad.
meh, there goes 20 bucks for gaskets and probably another 15 for overnight. |
I would be worried about it squeezing in to the intake path and possibly blocking airflow, too.
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Just use the kind that stay's plyable. thats what i use and it work's for me.
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Why won't you just do it the right way and get a gasket?
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IDK if he's doing it once yea..But it seems that they only last about 3 times removal and reinstallation of the LIM.maybe i just take mine off too much?
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Except for the metal S4 NA gasket (reusable many times), they're so cheap you might as well buy several at a time if you think you'll be removing your LIM often. Not that you should have to...
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Originally Posted by NZConvertible
Except for the metal S4 NA gasket (reusable many times), they're so cheap you might as well buy several at a time if you think you'll be removing your LIM often. Not that you should have to...
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Yeah you're right, it is.
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Why won't you just do it the right way and get a gasket?
Originally Posted by f1blueRx7
Yeah I just said the hell with it and bought all new gaskets from mazdatrix and overnighted them cause I need my car up and running. I wasn't 100% sure that the LIM to engine coolant seals were good, since that was the reason I pulled it off, it was leaking pretty bad.
meh, there goes 20 bucks for gaskets and probably another 15 for overnight. There is some level of impatience since I had to take off work today because the car is down. I actually thought this leak was coming from the coolant return line so I repaired that with a new hose, buttoned everything back up and was good to go. Well the spots under the car became progressively... bigger, instead of disappearing alltogether. Yesterday after I got home I noticed a large puddle. When I got under the car and saw the drips coming from the rear of the passengerside of the iron (drivers side in New Zealand :) ) I looked up and saw a small coolant stream running down from the LIM. I was pretty pissed because I really didnt' want to dig into a UIM/LIM/Turbo removal and reinstall at 4:30pm on a Sunday. Those kind of projects warrant sufficient time for parts to arrive, etc. And it's not like we can just run out to a local parts shop and grab the gaskets for an 89 Mazda Rx-7 Turbo. Even the dealers either "Can't find them" or can get them from a west coast dealer, however it's going to take a week. |
lol, nice avatar. picard FTW!
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Removing old bonded on gasket is the real bitch.
I RTV just about everything including the LIM. Never had a problem. The trick is clean flat sealing faces. Removal is easy, you just need a good lift point. |
I had a S5 n/a... and it had the metal LIM gasket... everything else I used orange high temp silicone. Came off very easy, heat tolerant, and sealed well.
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Originally Posted by f1blueRx7
And it's not like we can just run out to a local parts shop and grab the gaskets for an 89 Mazda Rx-7 Turbo. Even the dealers either "Can't find them" or can get them from a west coast dealer, however it's going to take a week.
Originally Posted by SureShot
Removing old bonded on gasket is the real bitch.
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Originally Posted by NZConvertible
They've even stopped looking at me funny when I go in with pages printed out from the parts catalogue. :D
:p: |
The problem with using RTV on the LIM is that it tends to block the stupid air bleed holes for the primary fuel injectors.
I dunno if the S5 engines are like this, but I know the S4's run the air bleed passages into the gasket. If you block those holes, your idle quality goes to shit. :( -Ted |
Yeah, I had a great time removing old gaskets from my engine. They might as well have been part of the engine since they bonded so well to it.
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Originally Posted by NZConvertible
That sucks, I guess I'm just lucky with Mazda parts suppliers. I have one Mazda dealer/workshop five minutes drive from home and one service workshop five minutes walk from work. Both know me on site and so far have gotten me anything I need that Mazda still stock, including plenty that needed to come from Japan. They've even stopped looking at me funny when I go in with pages printed out from the parts catalogue. :D
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spent 5 hours removing my old UIM to LIM gasket, my hands (more specifically my fingertips) HURT like a bitch, replaced it with a OEM mazda gasket, idle issues are mostly under control. Will this theing BREAK in and seal better with time? b/c i think i still have a vac leak
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I hate taking of the damn gaskets. I spent several hours friday and its still not off yet. I gave up for the day after the razor slipped and sliced my finger.
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Use nitrile gloves and that permatex gasket remover spray, let it sit for about 30 mins, whatever doesn't come off by peeling, should easily come off with a razor blade.
Back on topic, I reinstalled the LIM with a new gasket and new o-rings, I used RTV to hold the orings in place (they didn't really fit, they seemed to big to really sit down in the grooved) then I just very lightly rtv'd the gasket to the engine and LIM. I put everything back together, filled it with coolant, checked for leaks, now I'm going to let it cure for 24 hours before I start the engine and get the cooling system hot and pressurized. |
Originally Posted by RETed
The problem with using RTV on the LIM is that it tends to block the stupid air bleed holes for the primary fuel injectors.
I dunno if the S5 engines are like this, but I know the S4's run the air bleed passages into the gasket. If you block those holes, your idle quality goes to shit. :( -Ted Ya know Ted that remind's me of the time i put my TB spacer on backward's and couldnt figure out why my idle was soo shitty for about 6 months. DO'H! |
do what I do, order factory gaskets and use them as masters for tracing out on gasket paper.
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