I am replacing the water pump on my 3800sc with an electric pump. I looked up the torque on the bolts holding the cover on the water pump/block and found them to be torque and stretch specifications. My understanding is to never reuse these bolts. I am, however, having problems finding new bolts for replacing this pump cover. So the question is, 1) should I not use these old bolts? Second, I've pretty well researched the web for replacement bolts with no luck. There are 2 sizes of bolt for this replacement. Has anyone found a supplier for these bolts?

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Goody

The beauty of a solution lies in its simplicity

I cannot understand why torque to yield bolts would be used to mount a water pump in such a non-critical engine application. I would just reuse the water pump bolts and use Permatex coolant gasket sealant on the gasket and on the bolts. If these really are torque to yield bolts a GM dealer should stock them.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

I decided to go ahead and reuse the old ones for now. I'll swap them out before I reinstall the engine. Here is where I got the info http://www.torkspec.com/tor...?KI=12-3.8L-231ci-V6

The bolts are not necessarily torque to yield just because they use a torque-angle spec. If you can look at the GM manual or all-data etc, they will specify if the bolts must be replaced. I have reused the timing cover/water pump/oil filter adapter bolts numerous times and they are all torque-angle bolts, but I do not believe they are torque to yield.

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10.263 @ 134.44MPH - 1.49 60'
Billet 6262 Precision turbo, PT1001 intercooler, ST1 cam, 130lb springs, comp pushrods, HV3, ARP Rod bolts, otherwise stock L36.


Old M90 XP Cam time -
11.425 @115.60
1.543 60'