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| Waterpump replacement on 88 2.8 (Page 2/2) |
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Patrick
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OCT 18, 08:57 PM
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| quote | Originally posted by css9450:
It's gotta be for a stud and nut!
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I agree. What makes using a bolt there even worse, is that so many guys over the years have over-torqued the bolt... and ended up cracking/breaking off that section the water pump!  [This message has been edited by Patrick (edited 10-18-2022).]
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fierogt28
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OCT 22, 06:56 PM
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| quote | Originally posted by Patrick:
I agree. What makes using a bolt there even worse, is that so many guys over the years have over-torqued the bolt... and ended up cracking/breaking off that section the water pump!
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Absolutely great pointer!! Somebody should of said this back in 1990. It’s one part on the 2.8 engine, that never should of been approved by GM, that was just BS.
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lateFormula
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NOV 12, 09:51 AM
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So a couple weeks ago I got this all wrapped up and running. This story takes an interesting twist...
My car had been in a cocoon in my garage for at least 8 years, as I *thought* it needed a new water pump and wanted to replace it before I drove it again. Didn't want to be out joyriding in the car and have a cooling system failure. Why did I think I needed a new water pump? At slow speeds in neighborhoods (15-20MPH) I would hear a sound from the engine that sounded like marbles or ball bearings rattling around in a coffee can. I never could figure out what was causing the noise, but had read that this could be a symptom of a failing water pump. So after replacing it on the first drive out, I heard the sound again. Then on repeated drives, same sound. I know it is not the water pump, especially because during the replacement I also installed a Dodgerunner belt tensioner. Also, the water pump that I removed looked fine from all sides and the bearings were not loose.
But then I remembered that a few years ago on another car I owned that I had a rattle noise in the engine under very specific speed/engine load conditions. I took it in for diagnoses/repair and found out that the engine in that car (V6) had a small heat shield on one of the down pipes that was fastened with a metal zip tie at each end. One of those zip ties had broken, and under the right engine load, the vibration from the engine would cause that little heat shield to rattle on the pipe. So now I am pretty confident that the noise I am hearing in my Fiero is a rattling of the heat shield on the Y pipe.
But hey, my 34 year old car now has a new water pump and fresh coolant!
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Patrick
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NOV 12, 04:58 PM
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| quote | Originally posted by lateFormula:
...another car I owned that I had a rattle noise in the engine under very specific speed/engine load conditions. I took it in for diagnoses/repair and found out that the engine in that car (V6) had a small heat shield on one of the down pipes that was fastened with a metal zip tie at each end. One of those zip ties had broken, and under the right engine load, the vibration from the engine would cause that little heat shield to rattle on the pipe. So now I am pretty confident that the noise I am hearing in my Fiero is a rattling of the heat shield on the Y pipe.
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I have a JDM Subie STi that developed a similar noise after I had swapped in an aftermarket exhaust from the downpipe back. The rattling sound is rather loud, and damn annoying! Someday I'll crawl under there and rectify the situation. 
| quote | Originally posted by lateFormula:
But hey, my 34 year old car now has a new water pump and fresh coolant!
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Never a bad thing![This message has been edited by Patrick (edited 11-13-2022).]
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css9450
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FEB 13, 08:29 AM
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| quote | Originally posted by lateFormula:
Yes, looked like that out of the box. Had to cut a bit off with right angle grinder:
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Something I just noticed - Rodney sells an improved version of that bracket. The difference is, his doesn't require removal of the alternator bracket. Should save a few steps.
http://rodneydickman.com/pr....php?products_id=557
Maybe this has been on his site for years, but I just noticed it today.
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82-T/A [At Work]
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FEB 13, 08:39 AM
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| quote | Originally posted by cvxjet:
Make sure that your new water pump has a METAL impeller; I had one with a plastic impeller and the car would overheat- |
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I echo this... I had a plastic impeller (one of the Coltec Industries ones) and the impeller broke free from the shaft after only 6 months of use... car completely overheated on the highway, and I trashed the main bearings... had to get the engine rebuilt.
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