Yes, Scott – they do go between the housing and the block – if I stated otherwise, I was in error. In other words, since the gasket moves the housing away from the block – that part of the housing that does not have the gasket support should have the shims to provide support to the housing when you tighten the nut down. I would say if you used a more-than-standard gasket thickness-wise, then you would probably need more shims.
The only other thing I can think of is to lay a flat edge around the housing and the block area to make certain both are flat. Check for nicks in either around the sealing area, etc. I know you probably have already done this, but doesn’t hurt to mention it.
When I use silicon sealant I put it around all the bolts and do not use the shims.
Ed
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Scott
Sent: Thursday, November 12, 2009 1:16 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: leaky water pump bolt
Yeah, I did install those shims. In the previous post those would be the studs at #2 and #4. And I deduced from mazdatrix's site they would go between the housing and the block. Not between the housing and nut. Though as I am using a sandwhich plate and there are 2 gaskets in use one between the block and the sandwhich plate, the 2nd between the sandwhich plate and the water pump housing. So I should have used 2 shims per stud. What doesn't seem to fit in is the amount of seepage/ leakage that occured. As can be seen from the YouTube video seepage only from the #3, no where around that hole was leaking. But with the lack of evidence to support another conclusion I'll double the shims and hope for the best. If I were to forgo the combo gasket smeared with silicone approach would the shims still be required?
__________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
__________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________
The message was checked by ESET NOD32 Antivirus.