Don Del Posted April 19, 2021 Share Posted April 19, 2021 I am finally getting around to my planned cam change on my '99 3.5 V8 Defender 110 Station Wagon and I am in the process of sorting out the various steps. One of the areas I would appreciate input on is the installation of the new valley gasket. The replacement I have is the later type and I haven't been able to find any clear recommendation regarding the need for additional sealant during fitting other than the occasional recommendation to use blue Hylomar around the water passages. Any recommendations will be gratefully received! Cheers, Del Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 19, 2021 Share Posted April 19, 2021 I never sealed mine with anything other than the proper gasket and they've been fine. Quote Link to comment Share on other sites More sharing options...
garrycol Posted April 20, 2021 Share Posted April 20, 2021 I have always used sealant and not had leaks. Started using sealant because one fitted at the time was sucking in air and causing running issues. Quote Link to comment Share on other sites More sharing options...
elbekko Posted April 20, 2021 Share Posted April 20, 2021 I always put a dab of sealant in the corners to fill up the gap between the rubber seal and the valley gasket, nothing else. Quote Link to comment Share on other sites More sharing options...
Don Del Posted April 20, 2021 Author Share Posted April 20, 2021 14 hours ago, garrycol said: I have always used sealant and not had leaks. Started using sealant because one fitted at the time was sucking in air and causing running issues. Out of interest what sealant did you use? Del Quote Link to comment Share on other sites More sharing options...
Quagmire Posted April 20, 2021 Share Posted April 20, 2021 (edited) I do the same as elbekko and put a smidge of black silicone where the corners of the rubber valley end seals meet the head/block interface. I also use a tiny smear of blue hylomar around the coolant ports but that's mainly because my head's weren't treated well in a previous life and are a bit pitted in that region. Never had any valley leaks. Edited April 20, 2021 by Quagmire Added screenshot of WSM Quote Link to comment Share on other sites More sharing options...
Don Del Posted April 20, 2021 Author Share Posted April 20, 2021 Gentlemen, thank you for the input! Del Quote Link to comment Share on other sites More sharing options...
garrycol Posted April 21, 2021 Share Posted April 21, 2021 9 hours ago, Don Del said: Out of interest what sealant did you use? Del Just a standard RTV style sealant suitable for vehicles - just a smear not a lot as you dont want it to ooze out and restrict airflow etc. Quote Link to comment Share on other sites More sharing options...
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