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#1
29-10-15, 15:56
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Not necessarily plugged
Hi Peter
With my HUP it wasn't that the muffler was plugged it was that the little critters had loaded it with acorns. That burned like charcoal with the force draft of the engine, which still had enough oxygen for the muffler to glow merrily a couple of inches from the fuel tank. Out of the exhaust pipe came the fall smell of burning oak leaves. Shoving a hose up the tail pipe and turning on the water resulted in an explosive cloud of steam. Fire was out but the muffler was ruined with the seam split. But back to your problem if you have a IR thermometer checking the exhaust manifold and along the pipe should show a steady drop in temperature. I'll check my engine test notes get some temperature numbers at particular RPM to compare to. I us my IR gun to check manifold port temperatures, good check for intake leaks which can cause high exhaust temps. Cheers Phil
__________________
Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com Last edited by Phil Waterman; 29-10-15 at 15:58. Reason: spelling 
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#2
30-10-15, 21:08
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If it isn't timing it could be a blockage - put a few strips of masking tape along the length of the exhaust when cool. Fire it up and watch the tape as she idles...the masking tape will start discolouring/burning first in your problem spot.
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#3
31-10-15, 03:35
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Saracen exhaust problem
Thanks for the temperature information. I will try the IR thermometer and the tape trick.
Let you know what happens. Peter
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#4
14-11-15, 03:32
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Hot exhaust
Well, I tried the tape and IR test. After idling it at about 1500 RPM for several minutes. Hopped out and ran the IR. the temperature was pretty even all along the pipe. The tape didn't show a hot spot either.
Went back and tried to run the engine faster. Can't seem to get it much over 1500 Rpm, just tries to stall. shut the engine off and went outside and both the tires were burning pretty good and the grass below and between the tires was pretty scorched. I had a garden hose handy and put it out. There must be something like a flame thrower effect going on. I didn't run the motor for much more than 4 or 5 minutes. Got any ideas on this one? Peter
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#5
14-11-15, 03:56
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Your rubber tires caught fire? Yikes! Time to strip the exhaust out from the manifold out.
__________________
Terry Warner - 74-????? M151A2 - 70-08876 M38A1 - 53-71233 M100CDN trailer Beware! The Green Disease walks among us!
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#6
14-11-15, 05:20
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If the motor is running lean it will make the exhaust hot too.
__________________
1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2
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#7
16-11-15, 04:36
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Hot exhaust
If the Timing is to far advanced the exhaust will heat up red
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