Crankcase Breather Top Broken and Engine Drop in Power
Posted: 07 Sep 2021, 19:19
Hello everyone I’m Blrsjer, I’ve just purchased myself a 1986 T25 camper, loving it so far I’m absolutely in love with the van. However the engine has a few issues. Engine: 1.9 DG
I’ve recently rebuilt the carb and fixed it’s dodgy choke so she’s starting much nicer. But today the following happened:
Went to start her up, turned the ignition the battery light comes on on the dashboard. She struggles to start a little but seems okay. Upon acceleration in second gear there’s a huge drop in power and an odd noise coming from the engine.
Looking at the engine, the cap on the crankcase breather has come loose and is vibrating up and down whilst this is happening the engine’s idle seems a bit off. When pushed back down the engine goes back to normal.
First of all: what is the best way to re-secure the cap, is there a certain sealant I should purchase? Second of all: Could the loose cap be the reason for the loss in power? This is the first time the engine has lost power and also the first time this cap has come loose, hence why I’m thinking there could be a correlation.
I’m not an experienced mechanic lets say but I am fairly competent with a spanner! So any explanations and help are most welcome!

I’ve recently rebuilt the carb and fixed it’s dodgy choke so she’s starting much nicer. But today the following happened:
Went to start her up, turned the ignition the battery light comes on on the dashboard. She struggles to start a little but seems okay. Upon acceleration in second gear there’s a huge drop in power and an odd noise coming from the engine.
Looking at the engine, the cap on the crankcase breather has come loose and is vibrating up and down whilst this is happening the engine’s idle seems a bit off. When pushed back down the engine goes back to normal.
First of all: what is the best way to re-secure the cap, is there a certain sealant I should purchase? Second of all: Could the loose cap be the reason for the loss in power? This is the first time the engine has lost power and also the first time this cap has come loose, hence why I’m thinking there could be a correlation.
I’m not an experienced mechanic lets say but I am fairly competent with a spanner! So any explanations and help are most welcome!
