Gasket/pulling turbo etc questions 1990 SW20

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Tue, 01 May 2018 16:22:08 GMT

Regarding studs (I'm looking to replace exhaust manifold, dump pipe studs and nuts) should I apply some thread lock to the end going into the head and turbo? I'll use the double nut method to tighten the studs

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Mon, 30 Apr 2018 19:53:53 GMT

Yeah that would be great, have to get one anyway so that would be handy

Re: Gasket kit questions 1990 SW20 (Kook)

Mon, 30 Apr 2018 14:37:26 GMT

I think I've got a spare HFHOE floating around too if you're interested (would have to find it though)

Re: Gasket kit questions 1990 SW20 (Kook)

Mon, 30 Apr 2018 14:25:25 GMT

MG_MR2
Yesterday the turbo and exhaust manifold came out and I got to have a good look beneath.

Just curious regarding the HFH and HFHOE hoses; I'm obviously going to replace them but I think I might have some silicone hose that might be the correct I/D. Any thought on using that (possibly using a heat shielding sleeve over it) for longevity and better resistance to heat?

I got the HFH HFHOE silicone hoses (with the kit from Stoney), but opted to replace them with the stock rubber hoses. HFH comes with a heat sleeve and I added one to the HFHOE.

Only reason for that is I've heard silicone really doesn't like too much heat and I don't want to do it again.

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Mon, 30 Apr 2018 12:09:23 GMT

Yesterday the turbo and exhaust manifold came out and I got to have a good look beneath.

Just curious regarding the HFH and HFHOE hoses; I'm obviously going to replace them but I think I might have some silicone hose that might be the correct I/D. Any thought on using that (possibly using a heat shielding sleeve over it) for longevity and better resistance to heat?

Re: Gasket kit questions 1990 SW20 (Kook)

Thu, 26 Apr 2018 16:35:15 GMT

MG_MR2
Thanks Carmikey, same reason I chose black. I think the second one your thinking of is 'the right stuff' or similar which is not ideal for that application.

Deevon: I am tending towards the engine drop albeit I think it's overkill and forces me to want to check, clean, paint, replace more

Definitely an issue, but "do it once, do it right"

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Thu, 26 Apr 2018 15:16:55 GMT

Thanks Carmikey, same reason I chose black. I think the second one your thinking of is 'the right stuff' or similar which is not ideal for that application.

Deevon: I am tending towards the engine drop albeit I think it's overkill and forces me to want to check, clean, paint, replace more

Re: Gasket kit questions 1990 SW20 (Kook)

Thu, 26 Apr 2018 12:26:47 GMT

I'm halfway through a major service and didn't drop the engine.

Definitely possible, if I had my time again, I would drop it.

But, the difference is that time is a non issue for me for the most part.

Re: Gasket kit questions 1990 SW20 (Carmikey)

Thu, 26 Apr 2018 11:33:23 GMT

MG_MR2
On a side note, any strong opinions between using Permatex ultra grey or ultra black for rocker cover, oil pan etc?

I've always used the black one as it has an 'oil resistantance', from memory, permatex offer two slightly different Black's. Not sure about the grey, never used it to be honest.

Sent from my SM-J320ZN using Tapatalk

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Thu, 26 Apr 2018 09:50:20 GMT

On a side note, any strong opinions between using Permatex ultra grey or ultra black for rocker cover, oil pan etc?

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Wed, 25 Apr 2018 17:12:31 GMT

Interesting.

So I'm standing at my engine torn about dropping the engine. I can see the benefits but ill be going down a rabbit hole.

If anyone out there in Sydney is keen to give me a hand, learn a few things, have a beer over a weekend and maybe has an engine crane it might be my deciding factor...

Re: Gasket kit questions 1990 SW20 (Falcon)

Wed, 25 Apr 2018 06:28:45 GMT

Sticky tyres allow greater G forces to be generated and lateral G will cause the oil to Gravitate to the ends of the engine and away from the pickup point. Oil pump draws air. Goodbye bigend bearings. Longer right hand curves that push the oil toward the flywheel end of the engine appear to achieve the greatest result. Have a peek inside your sump to see what prevents the oil migrating away from the pickup.
These little cars originally came out with 195-205 - 60 - 14 not very wonderful tyres and sump design to match.
A number of blokes using the Gen2 engines install the Moroso sump to operate safely under G loadings.
Shimming oil pressure relief valve is a means to raise oil pressure BUT is not recommended on an old loose toleranced engine.

Re: Gasket kit questions 1990 SW20 (MG_MR2)

Tue, 24 Apr 2018 22:39:23 GMT

Hey Falcon,

Sump isn't off yet, it's really stuck on one side still (side closest to front of car as engine is tilted up and hard to get any leverage on).

The whole oil pressure thing just goes around in circles, hence why I didn't bother with exact figures, there's a wide range of variables that come into it and in my view Toyota is telling you the safe range.

I don't quite understand the big end/sticky tires comment? Are you referring to the extra load placed on the engine? Is the shimming of oil pressure relief valves a way of raising oil pressure?

In terms of kms, the car has about 200k kms but the engine is rebuilt (the car has an interesting/somewhat unknown history) based on a number of observations I've made. Hence dropping viscosity a bit; partly because I feel it's a fresh engine and just to see how I like the viscosity/brand (trying Nulon)

Re: Gasket kit questions 1990 SW20 (Falcon)

Tue, 24 Apr 2018 06:04:03 GMT

What contribution did you wish to make Kris? It aint a debate--------yet.
I'm a bit fascinated though. MG. You have the sump off. So was there any debris (carbon granules, sludge, metallic swarf, old gasket bits) caught on the pickup gauze ?? If yes then you can bet smaller stuff has gone through the pump and should be present in the filter. Use a tin opener type tool to cut open the filter and examine element.
You haven't stated your actual oil pressures, only that they are above minimums. These 3S engines seem to be able to suffer a fair bit of abuse even with lower than optimum pressures but if you are heading for track work it may be advisable to examine the pump and maybe even fit new bearings. They are known to take out their bigend bearings but that is usually achieved with sticky tyres on track. Lots of them running about with big kms. and have never had an oil pressure gauge near them! Ignorance being bliss comes to mind?? Congrats to you for monitoring pressures.
I would not advise shimming the oil pressure relief valve on a high km. engine.
Why are you reducing the oil viscosity from 50 back to 40 ? How many kms. on this engine ?

Re: Gasket kit questions 1990 SW20 (5SGTE)

Mon, 23 Apr 2018 20:16:39 GMT

Oh ****, I almost contributed to an OP debate. Phew Glad I read back.