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 New guy with 2 questions

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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: New guy with 2 questions   Sun May 13, 2018 7:44 pm

I just got my 91 BRMW home this weekend. Awesome car and I love it.
Question #1 , looking at the fan shroud sticker it says 5.7. From what I have been reading on this fine forum is that the pre TPI cars were 5.0???

Question #2, coolant leak. I have read about the control valve and heater core leaks. Heater core seems fine as well as the valve. What I have leaking is the factory alum. crimped clamp at the hose assembly on the back side of the control valve going to the alum tube to the heater core. Also the top quick disconnect plastic connector at the heater core. I checked with part stores as well as rockauto. They only show/offer bulk 5/8 and 3/4 heater hose. Im going to check with the GM parts dept. this week, but thought Id ask here first.

Thanks in advance for any help and or input. Great forum you have here, very informative.
MildBill
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Fred Kiehl

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Posts : 4706
Join date : 2009-11-13
Age : 69
Location : Largo, FL 33774

PostSubject: Re: New guy with 2 questions   Sun May 13, 2018 8:32 pm

I have one of the aluminum hoses that hooks between the core and the valve. I would like $30 shipped for it. They are a PITA to remove, but it can be done. Twist them to loosen the o-ring, and push on both tabs on the plastic clip to remove. I would suggest a new plastic clip when installing the donor piece, maybe even a new o-ring. You may find that carefully removing the swagged fitting (cutoff wheel in a Dremel tool) and using a hose clamp will work.

The RMWs came with either 5.0 or 5.7 L engines. Check the SPID on the passenger's side D pillar/jam for LO5 for the 5.7 L.

If you can find an S shaped hose, and decide to use it, put a piece of heat shield on it before installing. They used the aluminum because of the hose occupying a hot location.
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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: Re: New guy with 2 questions   Sun May 13, 2018 9:04 pm

Thank you so much Fred. If I can't work out something local I will let you know. I really love the look of your wagon and hope to make mine look as good as yours. I see you are from Largo, I was born and raised in Tampa, Temple Terrace to be exact. Small world, but I call the Bluegrass my home.
MildBill
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Fred Kiehl

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Posts : 4706
Join date : 2009-11-13
Age : 69
Location : Largo, FL 33774

PostSubject: Re: New guy with 2 questions   Sun May 13, 2018 9:22 pm

My wagon was sideswiped by a dump truck about 3 1/2 weeks ago. It goes to the body shop tomorrow. If you want to see the damage there is a thread with pictures in the general discussion section. I am currently working on a new hood to give me clearance for the intake on the 454.

I originally came from PA, but have no desire to return because of the cold, and snow.
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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: Re: New guy with 2 questions   Mon May 14, 2018 8:56 pm


Fred, I looked at removing that hose assy. today after work. Yes it looks like a PITA. Im thinking removing the wiper motor will make it easier/ give me some more room. Besides the bolts for the wiper motor on the fire wall, should I disconnect the motor from the wiper linkage or just rotate it out of the way?
Thanks
WildBill
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Fred Kiehl

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Posts : 4706
Join date : 2009-11-13
Age : 69
Location : Largo, FL 33774

PostSubject: Re: New guy with 2 questions   Mon May 14, 2018 9:10 pm

Removing the wiper motor will not make it easier. Run the wipers an turn off the car when they are up. If you remove the screws along the front under the seal, you can get it off the clips and out. There is a small filler below the DS wiper arm that will allow you to remove the entire left cowl without removing the wiper arm. Do not pry on the glass to remove the push pins if you decide to pull the whole cowl. I stupidly did that and broke my windshield.
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Sprocket

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Join date : 2008-11-04
Location : Palm Beach County

PostSubject: Re: New guy with 2 questions   Mon May 14, 2018 10:12 pm

Bill, all 91s were 305s even the Buicks. In 1991 the only B-body that had a 350 was the 9c1 Police car. The other TBI years 92 and 93 the 350 was standard in the Buicks.

If it is a 91 then someone likely switched the fan shroud cover as I did on my 92 Caprice as it was cracked. I told the guy who bought it was a 305 but he swears he has a 350! (the shroud came from a 92 Buick). If you can read the SPID label inside the tailgate on the pass side it'll say L03 (305) or L05 (350).
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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: Re: New guy with 2 questions   Wed May 16, 2018 6:28 pm

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Well I got the hose off today after work. It looks like the previous owner tried a JB weld fix, that didn't work. Im thinking about doing away with the valve, joining the hose from the back of the intake to the lower heater core line. Then coming from the radiator with 3/4 hose and installing a 3/4x5/8 hose barb to a 5/8 hose to the top heater core input. What negative effects will I get from this? What say the power of the Longroof Forum? Thanks all for the help and input
MildBill
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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: Re: New guy with 2 questions   Wed May 16, 2018 6:47 pm

Also the label on the inside of the tail gate has L03. So I have a 305 car, no worries. As long as I can cruise down the road @65/70 with the family in comfort Im good.
MildBill
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Fred Kiehl

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Posts : 4706
Join date : 2009-11-13
Age : 69
Location : Largo, FL 33774

PostSubject: Re: New guy with 2 questions   Wed May 16, 2018 8:12 pm

You can put the restrictor from a 92-3 in place of the original valve, and connect the hoses, but do not forget to block the vacuum hose to the valve. You can get the restrictor at the local parts store.
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MildBill



Posts : 11
Join date : 2018-05-10
Location : Murray Ky

PostSubject: Re: New guy with 2 questions   Wed May 16, 2018 10:09 pm

So what problems will I have if I do away with the valve and have hot H20 running through the heater core all the time?.
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Fred Kiehl

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Posts : 4706
Join date : 2009-11-13
Age : 69
Location : Largo, FL 33774

PostSubject: Re: New guy with 2 questions   Wed May 16, 2018 11:28 pm

The HVAC closes a blend door to keep air from going through the core, but it still heats up more with constant full volume hot coolant going through. There is still some air that gets past the blend door. The HVAC system may see a diminished ability to cool the interior, and if it has been switched to R134A that could be critical. The manufacturer put the valve or restirctor in place to allow the AC to be more efficient.
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