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@  Tobias05 : (26 November 2014 - 03:02 AM) RT, if it makes ya feel better, I'm about to start on my 3rd LIM R&R. So far, 2 for 2, no leaks! haha.
@  Sapias Lupus : (26 November 2014 - 02:03 AM) Also any good steering wheel replacements out there (AM) Mine is nasty lol if not I'll look for a stock one unless someone knows a good restoration for them.
@  Sapias Lupus : (26 November 2014 - 01:44 AM) Anyone have a write up for the gauge in the light switch area??? I searched no results.
@  RegalTraveler : (25 November 2014 - 10:33 PM) haha. alright.
@  gojo83 : (25 November 2014 - 10:30 PM) when I get home Ill pm you a pic of my ex's lim gaskets
@  RegalTraveler : (25 November 2014 - 10:15 PM) ugh.
@  gojo83 : (25 November 2014 - 10:13 PM) the lim gasket
@  RegalTraveler : (25 November 2014 - 10:11 PM) so, leaking around those sensors, do you think that is the LIM or some other gasket?
@  RegalTraveler : (25 November 2014 - 10:10 PM) how messed up the supercharger or the gasket is?
@  gojo83 : (25 November 2014 - 10:07 PM) up to you but i bet you will be surprised how messed up it is when you remove it
@  RegalTraveler : (25 November 2014 - 09:58 PM) I wasn't planning on replacing it, might just drive it until it dies at this point. but the thought stemmed when I was planning on doing my SC coupler.
@  gojo83 : (25 November 2014 - 09:57 PM) so I would err on the side of 1200 based on what blackbetty said. i have a friend that owns a shop so its different and cheaper
@  RegalTraveler : (25 November 2014 - 09:53 PM) and yea, at a mechanic. Not a job I'm going to be tackling myself. especially without a garage and in the cold of winter.
@  gojo83 : (25 November 2014 - 09:53 PM) it also depends on which LIM gasket you use and where you source it from I have seen it in price from 38-64 so it really depends and if you get the alum coolant elbows they are a bit more and the injector orings are like 15 and the gen v gasket is 30+ depending
@  RegalTraveler : (25 November 2014 - 09:52 PM) I'm not sure if it's the LIM. I'm seeing antifreeze come up around what appears to be some kind of sensor at each cylinder. it just runs along the top of the valve cover and fills up all the holes in orange.
@  BlackBetty : (25 November 2014 - 09:50 PM) lower intake manifold gasket is 1200 at Dealership in my town. i did it myself no leaks for less than $100
@  gojo83 : (25 November 2014 - 09:48 PM) mechanic you are looking mostlikely 550-700 would be my guess
@  gojo83 : (25 November 2014 - 09:48 PM) parts you are looking at about 100-125 depending on if you are getting the gen v gasket or gen 3
@  gojo83 : (25 November 2014 - 09:47 PM) what do you mean get it done like mechanic or parts cost
@  RegalTraveler : (25 November 2014 - 09:46 PM) Anyone know about what it costs to get an intake gasket done on a GS?

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Brake fluid: can synthetic and regular mix?


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#1 RegalBM

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Posted 21 May 2008 - 11:49 PM

I went to Autozone this afternoon trying to buy some regular DOT-3 brake fluid, but surprisingly saw a lot of synthetic fluid, like Prestone and Valvoline, and the regular was rare. The guy at AZ said synthetic is compatible with regular and they can mix. I remember I once read an article on the web saying, once the synthetic fluid is used, it may not be possible to change back to regular any more. Any comments?

Thanks.
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#2 Scimmia

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Posted 22 May 2008 - 01:18 AM

There is no such thing as non-synthetic brake fluid. Some companies use "Synthetic" for marketing, some don't, but it doesn't matter either way.
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#3 attist178

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Posted 22 May 2008 - 03:44 AM

I'm too tired to explain "synthetic" brake fluids...it's complicated and it has big words...lol.

But no, don't mix them. And don't listen to parts store guys...the majority of them have absolutely no idea what they're talking about.

A good rule of thumb: Don't mix stuff with different names.
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#4 Scimmia

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Posted 22 May 2008 - 01:30 PM

I'm too tired to explain "synthetic" brake fluids...it's complicated and it has big words...lol.

But no, don't mix them.


I'd be VERY interested in hearing the explaination, or atleast getting a reference. This is contrary to everything that I've found about brake fluid. Polyethylene Glycol is by it's very nature synthetic, so there is no brake fluid out there that's not synthetic.

Unless you were thinking of DOT5 (silicon) fluid vs DOT3/4, which isn't what we're talking about here.
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#5 RegalBM

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Posted 22 May 2008 - 03:28 PM

OK, can I do this as a bottomline? Pump the old brake fluid out from the master cylinder reservoir and then put the synthetic fluid in. Since can't get all the old fluid completely out from the brake system, there will still be some mix but it seems to me it should be much better. Would this be fine?
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#6 oakleafresin

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Posted 22 May 2008 - 03:47 PM

For what its worth, I flushed my brake lines out last year with "Synthetic" Prestone fluid from Autozone and I havent had a single problem stopping. I used a Mitty Vac. I took as much of the old crap out of the master cylinder as I could and refilled it with the Prestone. Then I bled each caliper till clear(ish) fluid came out.

A couple weeks ago I rebled them using this process and the fluid looked opaque and dark brown (rather than black/green) almost like rust. I dont know wtf the deal was with that but the car is still stopping great lol. Im sure dark brown is a normal color though. Would probably turn green eventually.
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#7 Scimmia

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Posted 22 May 2008 - 09:55 PM

OK, can I do this as a bottomline? Pump the old brake fluid out from the master cylinder reservoir and then put the synthetic fluid in. Since can't get all the old fluid completely out from the brake system, there will still be some mix but it seems to me it should be much better. Would this be fine?


Bottom line is that all DOT3/4/5.1 fluids are compatible, and all synthetic. As long as you don't get DOT5, you're fine. I'm guessing that attist178 was confusing synthetic with silicon.
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#8 Dusty

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Posted 23 May 2008 - 05:05 PM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone
If you have not flushed the fluid recently I would just get a big bottle of Dot 3 or 4 synthetic and change out the fluid. Easy to do with a helper to push the brake pedal.
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#9 RegalBM

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Posted 03 June 2008 - 01:33 AM

I hope this is the ultimate answer...I got a chance to talk with a good friend of mine today, who holds a chemistry PhD and is a technical team leader in the R&D department of Valvoline. He said no problem to mix the synthetic with the regular ones (I am not going to elaborate his explanation here).

Just wanted to post this fyi and hope it helps.
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#10 Guest_LSChris_*

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Posted 03 June 2008 - 06:16 AM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone

^^X2
DOT 5 silicone fluid is not compatible with conventional brake fluids and they will seperate over time if mixed. DOT 5 silicone brake fluid can't be used in systems with ABS because the action of the ABS unit will induce air into the system.
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#11 RegalBM

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Posted 03 June 2008 - 04:11 PM

+1 on mixing DOT 3/4/5.1 Just say away from DOT 5 silicone

^^X2
DOT 5 silicone fluid is not compatible with conventional brake fluids and they will seperate over time if mixed. DOT 5 silicone brake fluid can't be used in systems with ABS because the action of the ABS unit will induce air into the system.


Yes, my friend meant DOT-3/4/5.1 and no mix with DOT-5.
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