For the recent overhaul, I purchased an Airtex 41566 pump (that is the one without a vapor bleed). Even though I did a 30 minute test run before we
pulled the front subframe back in, I did not notice anything out of place.
When the coach was back on the road, we would often get a blast of gasoline fumes into the cab. At three different times, I fixed the three things
that I was sure were the cause. Nope.....
We also developed an oil leak down by the filter. In an effort to identify that, I had my head in the right wheel well with the liner out after we
returned from Amana. There seemed to be no reason for the oil leak, but that took an immediate second place to the fuel that was running down the
side of the fuel pump. I replaced the pump. More about that later.
When we returned from the next excursion that was just as far east as Amana is west for us, I got out the sheaf of papers about the overhaul and
contacted RockAuto about a warranty. The corespondent asked what vehicle it was installed in and like an honest fool, I wrote a 1973 GMC Transmode
(from their listing, but maybe not how I ordered it). With that, he said that as that was not the application that Airtex lists for that number, he
could not warranty it. (I was angry and annoyed.) The pump had been used for less than 1500 miles and that was maybe 25 hours total.
At that point, I contacted Airtex. My real intent was to get the Transmode listing into their catalog. It was here that I came on a very friendly
shore. I explained to the contact there that the 41566 pump was THE Number for an engine driven pump for this family with 455 from '73 to some of
'77. He also filled in that RockAuto is not a distributor and he didn't actually know where they got the Airtex pumps that they sold. The he
volunteered to ship me a replacement 41566. I accepted and it arrived today. The defective pump is boxed up to go back as soon as I clear up some
other shipping issues.
About the replacement. I live in striking range of NAPA's Tri-State warehouse, O'Reilly's Michigan and northern Ohio warehouse and Auto Value's local
warehouse. Nobody had a 41566 version pump by any supplier. So, I got a 41567 (the one with the vent fitting) put a short hose and plug on it and
screwed it in. Off we went for Albany (NY) with out fuel vapor, finally.
I now have the right 41566 pump next to the coach in the barn, and it will get installed, but I am going to cure the lube oil leak that is at the
cooler adapter before anything else.
For those that might care, we are a little short of 3K on the engine and it is running better than it did and that is something to say. It pulls so
much better with the cam Dick P recommended that I am now wondering if a 3.55 would be an improvement. Remember, this is a very light coach. I do
not have a good read on fuel rate yet, but it seems to back in the low 9's where it was before #7 shed its rings.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
pulled the front subframe back in, I did not notice anything out of place.
When the coach was back on the road, we would often get a blast of gasoline fumes into the cab. At three different times, I fixed the three things
that I was sure were the cause. Nope.....
We also developed an oil leak down by the filter. In an effort to identify that, I had my head in the right wheel well with the liner out after we
returned from Amana. There seemed to be no reason for the oil leak, but that took an immediate second place to the fuel that was running down the
side of the fuel pump. I replaced the pump. More about that later.
When we returned from the next excursion that was just as far east as Amana is west for us, I got out the sheaf of papers about the overhaul and
contacted RockAuto about a warranty. The corespondent asked what vehicle it was installed in and like an honest fool, I wrote a 1973 GMC Transmode
(from their listing, but maybe not how I ordered it). With that, he said that as that was not the application that Airtex lists for that number, he
could not warranty it. (I was angry and annoyed.) The pump had been used for less than 1500 miles and that was maybe 25 hours total.
At that point, I contacted Airtex. My real intent was to get the Transmode listing into their catalog. It was here that I came on a very friendly
shore. I explained to the contact there that the 41566 pump was THE Number for an engine driven pump for this family with 455 from '73 to some of
'77. He also filled in that RockAuto is not a distributor and he didn't actually know where they got the Airtex pumps that they sold. The he
volunteered to ship me a replacement 41566. I accepted and it arrived today. The defective pump is boxed up to go back as soon as I clear up some
other shipping issues.
About the replacement. I live in striking range of NAPA's Tri-State warehouse, O'Reilly's Michigan and northern Ohio warehouse and Auto Value's local
warehouse. Nobody had a 41566 version pump by any supplier. So, I got a 41567 (the one with the vent fitting) put a short hose and plug on it and
screwed it in. Off we went for Albany (NY) with out fuel vapor, finally.
I now have the right 41566 pump next to the coach in the barn, and it will get installed, but I am going to cure the lube oil leak that is at the
cooler adapter before anything else.
For those that might care, we are a little short of 3K on the engine and it is running better than it did and that is something to say. It pulls so
much better with the cam Dick P recommended that I am now wondering if a 3.55 would be an improvement. Remember, this is a very light coach. I do
not have a good read on fuel rate yet, but it seems to back in the low 9's where it was before #7 shed its rings.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
