Re: TB removal and then some!!! - ZR-1 Net Registry Forums

Roadster · 05-20-2019

Well it's been awhile since I've posted up....I haven't ran or even started the 94 since last June....ever since I did a number on the AC Compressor...
Have a new one ready to install and noticed when I slightly lifted the plenum....the gaskets ripped on both sides....kind of disappointed with that as they only had a few thousand miles on them..
Ended up pulling the plenum completely....will order new gaskets or reuse my originals....
Now have open access to the AC compressor....this should be interesting....[emoji849][emoji16]20190520_164238.jpg 20190520_164254.jpg 20190520_174937.jpg 20190520_174941.jpg

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Roadster · 05-20-2019

Posting up on your cell is a challenge to say the least.....

Young1 · 05-20-2019

Grease the gasket and it won't stick

A26B · 05-23-2019

The principal purpose of a gasket is to seal, not to slip, slide & be reusable.

Real disappointment would be to install a plenum gasket & have it move around & let coolant into an intake runner or have a vacuum leak. Gripping the mating surfaces is a good characteristic.

DRM500RUBYZR-1 · 05-23-2019

Quote:

Originally Posted by A26B

The principal purpose of a gasket is to seal, not to slip, slide & be reusable.

Real disappointment would be to install a plenum gasket & have it move around & let coolant into an intake runner or have a vacuum leak. Gripping the mating surfaces is a good characteristic.

Wisdom there!

Gaskets = Inexpensive
Engine = Pricey
Choose wisely.
Marty

dredgeguy · 05-24-2019

Tom,
My AC compressor failed during the BG trip last week and we are replacing it today at Wazoo headquarters. Come on down!

Roadster · 05-25-2019

Quote:

Originally Posted by Young1

Grease the gasket and it won't stick

What do you recommend to use if necessary.....hopefully I won't have to pull the plenum again.....lol.....did I really say that!!!

Quote:

Originally Posted by A26B

The principal purpose of a gasket is to seal, not to slip, slide & be reusable.

Real disappointment would be to install a plenum gasket & have it move around & let coolant into an intake runner or have a vacuum leak. Gripping the mating surfaces is a good characteristic.

I hear you there Jerry.....guess I didn't understand the difference of the thicker gasket being more prone to tear when removed as opposed to less chance of the thinner gasket doing the same.....I did the coolant bypass 2 years ago....so I won't have to worry and when I removed the plenum twice before the gaskets remained in one piece....not complaining....just understanding the situation better now....
Btw.....order new gaskets from you and they were here in short order....thanks for shipping quickly as always....

Quote:

Originally Posted by DRM500RUBYZR-1

Wisdom there!

Gaskets = Inexpensive
Engine = Pricey
Choose wisely.
Marty

Yes Marty.....I can always use wisdom.....lol

Quote:

Originally Posted by dredgeguy

Tom,
My AC compressor failed during the BG trip last week and we are replacing it today at Wazoo headquarters. Come on down!

Yes I did read that Charlie....you have had some luck with your AC system....
Would really enjoy coming down....but have started working to get the 74 back together by the end of Summer....ready to finish up the engine and putting more of the suspension together....so no real time as of now....but I'm sure there will be pics and text posted soon on your install....

Roadster · 05-25-2019

Well I have the AC Compressor out of the engine compartment and on the bench....as you can see in the pics that the original and replacement are identical....which is a good thing...lol
I am still debating on whether or not to change out the accumulator.....I know that I probably should...but IIRC....the FSM mentions not to replace it...yet Denso insists on it for compressor warranty purposez....if I can remove it easily....I will probably do it....
In the pics....the original and the replacement...the mess up I did on the shaft...getting ready to do a cleanup...had to loosen the alternator bolt to remove the compressor bolt...20190525_144510.jpeg 20190525_144528.jpeg 20190525_144814.jpg 20190525_144823.jpg 20190525_144953.jpg 20190525_145023.jpeg

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Roadster · 05-25-2019

And the side by side....also need to make sure I get the correct compressor oil....anyone have a part number or the correct name....I know it has to be R134a compatible.....but there are different oils out there from what I can determine....thanks...20190525_145120.jpg

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Roadster · 05-26-2019

In addition to the info that Dave Hetrick has posted here in the Group and the new FB Group....I have been doing a lot of research myself....this is what I have found out about the correct PAG oil to use in our compressors......our compressors are to use PAG 46 which is equivalent to ND-8 oil which is required for our Reciprocating Swash Plate R134a Compressor....here is a PAG Oil reference Chart to check out.... http://greenvald.co.il/.../12/PAG_oi...ication-05.pdf and here is part of an article from MACS talking about the different types of PAG Oil available and their thickness in reference to use in AC Compressors.. "There are companies that sell oils (both ester and PAG) that are advertised as being “universal” that can supposedly be used in anything (except the hybrids referenced above) and with both R-12 and R-134a. But their use is a recipe for potential problems. There is a difference in the viscosity (thickness) of PAG 46, PAG 100 and PAG 150. You can actually see the difference by observing each being poured from their respective containers.
With that being the case, when utilizing a universal oil you can end up with one that is too thick for some applications and too thin for others. While that may not make a big difference with some compressors and the oil may work, there are others where the correct viscosity is critical, and the use of anything other than what is recommended can cause excessive noise or premature compressor failure. Also, if you just need to add some oil to a system, it isn’t a good idea to mix different types of oils, as you would do if you add universal to an R-12 system that contained mineral oil" So again....this is just additional info to check out before you service or rebuild your AC Compressor....😁😁

I need to call Denso on Tuesday....as I have mixed info from 2 Denso sources.....one says to measure the oil from the old and new compressor then add 2 ounces to each AC part...compressor...accumulator....etc....totaling 8oz... the other Denso info gives a whole different procedure in letting the oil from the new compressor (which is stated to be filled with the correct amount of oil from the factory)\ flow through the system for a period of minutes...etc... so a bit confusing to me....so needs to be verified one way or another...will report back with the determination on which is the correct method to use...😁😁

05-20-2019	#1
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	Re: TB removal and then some!!! Well it's been awhile since I've posted up....I haven't ran or even started the 94 since last June....ever since I did a number on the AC Compressor... Have a new one ready to install and noticed when I slightly lifted the plenum....the gaskets ripped on both sides....kind of disappointed with that as they only had a few thousand miles on them.. Ended up pulling the plenum completely....will order new gaskets or reuse my originals.... Now have open access to the AC compressor....this should be interesting....[emoji849][emoji16]20190520_164238.jpg 20190520_164254.jpg 20190520_174937.jpg 20190520_174941.jpg Sent from my SM-G965U using ZR-1 Net Registry mobile app __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

05-20-2019	#2
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	Re: TB removal and then some!!! Posting up on your cell is a challenge to say the least..... __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

05-20-2019	#3
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 895	Re: TB removal and then some!!! Grease the gasket and it won't stick __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

05-23-2019	#4
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,392	Re: TB removal and then some!!! The principal purpose of a gasket is to seal, not to slip, slide & be reusable. Real disappointment would be to install a plenum gasket & have it move around & let coolant into an intake runner or have a vacuum leak. Gripping the mating surfaces is a good characteristic. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.

05-24-2019	#6
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,715	Re: TB removal and then some!!! Tom, My AC compressor failed during the BG trip last week and we are replacing it today at Wazoo headquarters. Come on down! __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa

05-25-2019	#8
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	Re: TB removal and then some!!! Well I have the AC Compressor out of the engine compartment and on the bench....as you can see in the pics that the original and replacement are identical....which is a good thing...lol I am still debating on whether or not to change out the accumulator.....I know that I probably should...but IIRC....the FSM mentions not to replace it...yet Denso insists on it for compressor warranty purposez....if I can remove it easily....I will probably do it.... In the pics....the original and the replacement...the mess up I did on the shaft...getting ready to do a cleanup...had to loosen the alternator bolt to remove the compressor bolt...20190525_144510.jpeg 20190525_144528.jpeg 20190525_144814.jpg 20190525_144823.jpg 20190525_144953.jpg 20190525_145023.jpeg Sent from my SM-G965U using ZR-1 Net Registry mobile app __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

05-25-2019	#9
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	Re: TB removal and then some!!! And the side by side....also need to make sure I get the correct compressor oil....anyone have a part number or the correct name....I know it has to be R134a compatible.....but there are different oils out there from what I can determine....thanks...20190525_145120.jpg Sent from my SM-G965U using ZR-1 Net Registry mobile app __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member Last edited by Roadster; 05-25-2019 at 04:57 PM.

05-26-2019	#10
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	Re: TB removal and then some!!! In addition to the info that Dave Hetrick has posted here in the Group and the new FB Group....I have been doing a lot of research myself....this is what I have found out about the correct PAG oil to use in our compressors......our compressors are to use PAG 46 which is equivalent to ND-8 oil which is required for our Reciprocating Swash Plate R134a Compressor....here is a PAG Oil reference Chart to check out.... http://greenvald.co.il/.../12/PAG_oi...ication-05.pdf and here is part of an article from MACS talking about the different types of PAG Oil available and their thickness in reference to use in AC Compressors.. "There are companies that sell oils (both ester and PAG) that are advertised as being “universal” that can supposedly be used in anything (except the hybrids referenced above) and with both R-12 and R-134a. But their use is a recipe for potential problems. There is a difference in the viscosity (thickness) of PAG 46, PAG 100 and PAG 150. You can actually see the difference by observing each being poured from their respective containers. With that being the case, when utilizing a universal oil you can end up with one that is too thick for some applications and too thin for others. While that may not make a big difference with some compressors and the oil may work, there are others where the correct viscosity is critical, and the use of anything other than what is recommended can cause excessive noise or premature compressor failure. Also, if you just need to add some oil to a system, it isn’t a good idea to mix different types of oils, as you would do if you add universal to an R-12 system that contained mineral oil" So again....this is just additional info to check out before you service or rebuild your AC Compressor....😁😁 I need to call Denso on Tuesday....as I have mixed info from 2 Denso sources.....one says to measure the oil from the old and new compressor then add 2 ounces to each AC part...compressor...accumulator....etc....totaling 8oz... the other Denso info gives a whole different procedure in letting the oil from the new compressor (which is stated to be filled with the correct amount of oil from the factory)\ flow through the system for a period of minutes...etc... so a bit confusing to me....so needs to be verified one way or another...will report back with the determination on which is the correct method to use...😁😁 __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member Last edited by Roadster; 05-26-2019 at 12:12 PM.