ATK 143 1 Cars Posted December 15, 2017 Think my coolant leak is from my thermostat cap leaking. Earlier metal cap type. Anyone know what gasket is used and the part number, and how manh are used? Share this post Link to post Share on other sites
jeremy 71 Posted December 16, 2017 I assume you are referring to the cap on the expanion bottle. Before assuming it is the cap at fault it maybe the thermostat causing excessive pressure due to being in the closed position when the engine gets hot, then causing water to come out the small overflow tube. Share this post Link to post Share on other sites
ATK 143 1 Cars Posted December 16, 2017 Nope, referring to the cap over the thermostat - bolted on with two bolts. Thermostat underneath. Share this post Link to post Share on other sites
welshpug 1,675 Posted December 16, 2017 on the earlier thermostat its a rubber gasket either side of the thermostat, later ones is a single gasket with a groove that the thermostat fits into. most thermostats come with the gasket/seal, easier to just buy a new thermostat. Share this post Link to post Share on other sites
jeremy 71 Posted December 16, 2017 Ok when I replaced my thermostat it came with a rubber o ring. Share this post Link to post Share on other sites
farmer 328 1 Cars Posted December 17, 2017 Early type are no further parts from Peugoet Share this post Link to post Share on other sites
Leslie green 125 Posted December 17, 2017 (edited) There is someone on ebay selling an actual paper gasket they have made for the thermostat metal cover I noticed a while back, might be worth a look. Ebay number 232542122094 Edited December 17, 2017 by Leslie green Share this post Link to post Share on other sites
Miles 331 1 Cars Posted December 17, 2017 Replacements come with both O rings, failing that if not too bad some RTV works Share this post Link to post Share on other sites
ATK 143 1 Cars Posted January 2, 2018 RTV did the trick! Share this post Link to post Share on other sites
