Testarossa Window Sweep needed

Wyatt, parts are definitely getting harder to come by and this one had no less than four changes through production! By your description it sounds like you are needing PN 61502400 "right gasket", which was correct for early cars. Then at some (unknown) point it changed to PN 61539400. It again changed to PN 61543700 (valid for cars up to car no. 78847), then a 4th time to PN 61573600 from car no. 78848 to the end of production.

I have no idea what the differences were without comparing side by side, but I suspect at least one gasket redesign (61539400 or 61543700) came when the RH mirrors were installed--perhaps the window frame changed with the mirror and or removal of the 1/4 glass to adapt the mirror.

So for your original gasket, did the oil cause the gasket to deform and not fit tight against the window? Or did it rot or tear? If deformed you may be able to bond a semi-rigid strip on the inside to re-form it--use teflon, plastic etc. so it wouldn't scrape the window.

For your new (non) "compatible substitute"--what is the PN, and why does it not fit? Does the new gasket have a "bend" molded into it where it goes around the vertical window frame? If you can post some photos it would definitely help. Are you comparing by holding up or have you removed the moulding and tried to fit the gasket?

My (1988.5) configuration is different than early cars--it's three pieces: (1) the outer black aluminum moulding, (2) the gasket, and (3) a plastic "run channel" that the gasket slides into--then the channel & gasket slides into the frame. The early cars did not use this run channel so since all three earlier PNs superceeded to the last you probably have a "channel" gasket for a "non-channel" moulding. If so you may be able to order a channel, install the gasket and try to adapt both to your early moulding. I don't think a late moulding/channel/gasket would be a direct replacement for your car since the moulding also changed when gasket 61539400 started (and never changed again).

Here's what I think the correlation is (based on SPCs 339/85, 366/85 and 587/90):

Gasket______________Channel__________Moulding
61502400____________N/A_____________61502600
61539400____________N/A_____________61539300
61543700____________61543500?_______61539300
61573600____________61543500________61539300

You might try FerrParts for a used gasket and or channel, I know they have several TRs for breaking, I got a used passenger glass from them last year.

Please try to post photos so we have a better idea what happened, others will probably have some ideas as well.

 

Hi Wyatt, would you be so kind to show us lots of photos of your repair please ?

It may help other members here in future ...