Broken Gooseneck Water Pump Bolt - Chevy Impala SS Forum
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post #1 of 32 (permalink) Old 05-18-2018, 10:54 AM Thread Starter
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Broken Gooseneck Water Pump Bolt

Car: 1995 Caprice Classic. I was swapping out the thermostat on my pump (Gates). When I went to reattach the gooseneck housing the bolts had become stuck about half way down. Never had this issue. Suddenly one bolt broke. I cannot get it out. Broke numerous drill bits included a higher end one. Further problem is I ordered what I thought was the right size replacement bolt (GM 22539278) but it's slightly too big. Does anyone know the correct bolt size and or model no? And is the threading issue heat related? Poor machining? Something else? Been stuck for over a week now.

Last edited by 95CapriceClassic; 05-18-2018 at 11:01 AM.
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post #2 of 32 (permalink) Old 05-18-2018, 11:39 AM
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Been a while since I worked on my car but isn't the gooseneck on the water pump? Might be easier just to buy a new rebuilt water pump.

Otherwise I have found only cobolt drill bits will work. anything else will just dull up and not do anything. I am sure you know to start with a very small drill bit, use cutting oil, and very little pressure. Let the bit do the work.

I just had to do this on my truck getting the seat mount bolt out. Anything short of cobolt bits are a waste of time. There may be even better bits but I am not aware of them.

Rodney
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post #3 of 32 (permalink) Old 05-18-2018, 11:47 AM Thread Starter
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Rodney, I tried all kinds of bits. Nothing is getting though. They all just spin or snap. A pump with the pre-installed gooseneck and thermostat is available at a higher price and that may be what I have to do but I was trying to work with what I have. Just replaced this pump in November. Not really looking forward to doing it again. Definitely won't be going with Gates pumps anymore. The previous one lasted about 3 years.
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post #4 of 32 (permalink) Old 05-18-2018, 11:50 AM
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Car: 1995 Caprice Classic. I was swapping out the thermostat on my pump (Gates). When I went to reattach the gooseneck housing the bolts had become stuck about half way down. Never had this issue. Suddenly one bolt broke. I cannot get it out. Broke numerous drill bits included a higher end one. Further problem is I ordered what I thought was the right size replacement bolt (GM 22539278) but it's slightly too big. Does anyone know the correct bolt size and or model no? And is the threading issue heat related? Poor machining? Something else? Been stuck for over a week now.
Hmm....I found this on the LT1 site & Z28/Camaro: M6 x 1 x 25, GM part 22539278.

That information sounds correct to me, but to make 100% sure, until someone else here will verify, I sent my parts guy at the dealership an email, along with my VIN, so we can have the correct information.

When I run into a screw or bolt that starts getting difficult to remove, I'll apply some WD-40, and reverse and start threading the screw back in. I'll repeat the process a few times with plenty of WD (or similar) fluid to help.

I'd try this move and be careful to not break the 2nd bolt. I'd use 1/4" drive so you don't apply too much force.

I'll update the thread when I get a reply.

If you need replacements you can go to: eVilBay

Clear Image Tri-Ys & Hi-Flow cats >> 2.5" X-Pipe & Magnaflow Tri-Chambers, Mike Harris 4L60E, Circle-D 2,400 RPM TC, All MOOG FT End & Del-A-Lum bushed MOOG CTRL Arms, Eibach FT & New Stock HT rear springs. Hotchkis Sway Bars & End Links, RAISS, 3.73 Gears in Eaton carrier, Dynoshaft & CIA Loop, BMR Trailing Arms, Braided Brake Hoses, Taylor Spiro-Pro Wires, AutoMeter Water Temp & Oil PSI Gauges, Impala Console. ATE Blue Brake Fluid. Skip White distributor. 20's, Z28 Cluster, Corbeau GTS Seat
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post #5 of 32 (permalink) Old 05-18-2018, 12:15 PM Thread Starter
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Hmm....I found this on the LT1 site & Z28/Camaro: M6 x 1 x 25, GM part 22539278.

That information sounds correct to me, but to make 100% sure, until someone else here will verify, I sent my parts guy at the dealership an email, along with my VIN, so we can have the correct information.

When I run into a screw or bolt that starts getting difficult to remove, I'll apply some WD-40, and reverse and start threading the screw back in. I'll repeat the process a few times with plenty of WD (or similar) fluid to help.

I'd try this move and be careful to not break the 2nd bolt. I'd use 1/4" drive so you don't apply too much force.

I'll update the thread when I get a reply.

If you need replacements you can go to: eVilBay

That's the bolt I purchased but it's not the same. A little too big. I got the second bolt out. Just stuck with the broken one. Thank you.
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post #6 of 32 (permalink) Old 05-18-2018, 01:06 PM
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That's the bolt I purchased but it's not the same. A little too big. I got the second bolt out. Just stuck with the broken one. Thank you.
Okay I got the email from my buddy: 22539278 08.900 BOLT, HFH,M6X1X25,HDR PT,10.9,PS (W/PMP INL) (Service Lane Part) 1996 - 1996 02

Clear Image Tri-Ys & Hi-Flow cats >> 2.5" X-Pipe & Magnaflow Tri-Chambers, Mike Harris 4L60E, Circle-D 2,400 RPM TC, All MOOG FT End & Del-A-Lum bushed MOOG CTRL Arms, Eibach FT & New Stock HT rear springs. Hotchkis Sway Bars & End Links, RAISS, 3.73 Gears in Eaton carrier, Dynoshaft & CIA Loop, BMR Trailing Arms, Braided Brake Hoses, Taylor Spiro-Pro Wires, AutoMeter Water Temp & Oil PSI Gauges, Impala Console. ATE Blue Brake Fluid. Skip White distributor. 20's, Z28 Cluster, Corbeau GTS Seat
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post #7 of 32 (permalink) Old 05-18-2018, 01:19 PM Thread Starter
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Okay I got the email from my buddy: 22539278 08.900 BOLT, HFH,M6X1X25,HDR PT,10.9,PS (W/PMP INL) (Service Lane Part) 1996 - 1996 02

That's the part I already purchased but it's not a fit for my 1995 Caprice Classic 4.3L. It's a little too big.

Last edited by 95CapriceClassic; 05-18-2018 at 01:22 PM.
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post #8 of 32 (permalink) Old 05-18-2018, 02:08 PM
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either cut the longer bolt down or go buy one the same thread but shorter

unless you can "extract" the broken bolt you will need to drill it out and re-tap/thread the WP housing....and then get a new bolt whatever size/thread this new re-tap is

Maybe the Gates WP uses a different size bolt than the OEM AC Delco WP

The less painful fix may be just buy a new WP

\'96 BBB 383/T-56
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post #9 of 32 (permalink) Old 05-18-2018, 02:17 PM Thread Starter
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The less painful fix may be just buy a new WP

Looks like that's what I'm going to have to do. I'm getting nowhere. This has already taken up so much time and money in bolts, drill bits, etc... I don't think the Gates pump can handle the heat of the car (especially here in TX. Will go with the AC Delco model this time. Just so maddening that a little thing turned into all this.
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post #10 of 32 (permalink) Old 05-18-2018, 02:35 PM
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Confirm the new WP does come with a new gooseneck....most don't

rockauto has it for $179..

https://www.rockauto.com/en/moreinfo...037472&jsn=453

Not sure if off brand ones come with the gooseneck but on RA site the higher $ AC Delco is the only one "pictured" with the gooseneck.

Been about 20 years since I went EWP so still using my original AC Delco housing & goseneck

\'96 BBB 383/T-56
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