I have a 1989 CMC Speedster and need to loosen the windshield to access and smooth out dash vinyl that has bubbled in spots from adhesive underneath giving way. If I do so to press the bubbled vinyl flat in the direction of the windshield and/or pull the vinyl from the hood side, I believe I can repair the dash. My concern is cracking the glass if I don't loosen it the correct way.

If I can loosen the centre rod, I believe I can smooth the area of vinyl that has bubbled but my concern is that to loosen only the Center rod, I wonder if I am increasing the chance of cracking if it remains fixed at the posts.

Can anyone with experience removing replacing or even installing a speedster windshield comment on my challenge please?...

Original Post

Loosen the windshield posts at each corner of the windshield as well. The bolts are usually 17mm head(metric 10mm thread) directly under each post under the dash. If you loosen all three(center post too) you should be able to wiggle the windsj=hield around a bit and fix your vinyl. 

Is it possible that water has gotten under your dash vinyl?

Thanks DannyP!...It is possible that water got in but I can't see anything other than vinyl that appears to have loosened and bubbled up. I am hoping I can find a way to get new adhesive under the bubbled vinyl to hold it in place and tighten the windshield back down to hold it in place.  Also, the vinyl around the dash vents have lifted as well and will require adhesive to Re-glue the vinyl back down...Thanks for your recommendation...Mike

The L & R post bolts and the mirror rod nut need to be equally loosed ( and later tightended) evenly. To get at the leading edge of the vinyl you'll have to completely remove the windshield, clean the vinyl to cowl area, blue tape the surface of the vinyl and painted surfaces. Then brush on a coat of 3M adhesive to both the vinyl and surface it will adhere to. The reassemble the windshield applying equal torque to the post bolts and mirror rod  BTW , snug and a bit more only is enough tension ) 

@mboyd posted:

Thanks DannyP!...It is possible that water got in but I can't see anything other than vinyl that appears to have loosened and bubbled up. I am hoping I can find a way to get new adhesive under the bubbled vinyl to hold it in place and tighten the windshield back down to hold it in place.  Also, the vinyl around the dash vents have lifted as well and will require adhesive to Re-glue the vinyl back down...Thanks for your recommendation...Mike

Depending on what adhesive they used, I imagine it could be heat from the sun causing some off-gassing from the adhesive. 

Dlear1476 thanks for your reply. I must be mindful of the adhesive being a factor. I imagine when I get the windshield lifted or off, I may see indications of either water leakage or indication of problems with the adhesive.

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