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Re: Aerovee one EGT high

BobDz wrote:And your compression tests don't show a stuck / open valve.

Correct
by Bryan Cotton
Mon Mar 25, 2024 12:48 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

So.... High EGT can be caused by an excessively rich mixture. Fuel is still being burned when the exhaust valve is open. This scenario might also show lower CHT. But I am at a loss to explain why it would only be happening in one cylinder, and why it would just start randomly. Is the exhaust valve ...
by Bryan Cotton
Mon Mar 25, 2024 12:15 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

Onex107 wrote:The 80 psi leak down test will pinpoint a leaking valve.

When I did the 80 psi leakdown test yesterday I had no air leaking through the valves, just the rings.
by Bryan Cotton
Mon Mar 25, 2024 9:44 am
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Cable Fairing

Image
by Bryan Cotton
Mon Mar 25, 2024 9:43 am
 
Forum: Sonex-B / Waiex-B
Topic: Cable Fairing
Replies: 5
Views: 229

Re: Cable Fairing

Make them out of aluminum and then you don't have to hide them.
viewtopic.php?f=39&t=578&start=1020

Image
by Bryan Cotton
Mon Mar 25, 2024 9:36 am
 
Forum: Sonex-B / Waiex-B
Topic: Cable Fairing
Replies: 5
Views: 229

Re: Aerovee one EGT high

RodgerC wrote:It may be worth checking that you don’t have interference between valve adjusters and the rocker cover, due to an excessively compressed cork gasket.

Thanks Rodger. I've got rubber gaskets and there are definitely no witness marks on the inside of my valve covers.
by Bryan Cotton
Mon Mar 25, 2024 9:18 am
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

The valves look good. I'm going to swap the spark plugs on the #1 cylinder. They are new at annual and maybe one is faulty, or leaking even.
by Bryan Cotton
Sun Mar 24, 2024 6:52 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

Thanks Mike!

Final results:
#1 80/72
#2 80/67
#3 80/64
#4 80/74

The adapter was not threading happily into #3 and I suspect that lowered the reading a little.

Boroscope next.
by Bryan Cotton
Sun Mar 24, 2024 6:10 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

Bob, Here is the sequence. First I did the annual and all that entails: 1) torque heads 2) adjust valves 3) change plugs 4) compression test Then, some extra credit: 5) re-shim engine 6) redo main seal/polish flywheel surface 7) Fresh air induction So I noticed the EGT being higher after fresh air i...
by Bryan Cotton
Sun Mar 24, 2024 4:35 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854

Re: Aerovee one EGT high

The #1 CHT has been reading 100F. It seems faulty, 200-300 is more normal for me.

The troubling thing is the big change from normal after 200+ hours.
by Bryan Cotton
Sun Mar 24, 2024 3:29 pm
 
Forum: Aerovee
Topic: Aerovee one EGT high
Replies: 28
Views: 854
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