Quote:
do another lash adjustment, using a different mechanic
Use a 3/8" box-end mechanic or a 3/8" socket mechanic. 
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| 64 valiant poor idle when warm https://slantsix.org/forum/viewtopic.php?t=43572 |
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| Author: | vancouver [ Tue Feb 08, 2011 6:36 pm ] |
| Post subject: | 64 valiant poor idle when warm |
i have a 64 valiant with a rebuilt motor. the valves have been set properly, timing,new plugs,leads, points and condenser checked, new carb ,fuel pump. compression test all done by a mechanic. yet... it idles poorly once it is warm. it feels like it is missing. mechanic doesn't know what is wrong. he says the heat riser seems stuck (without fixing it) also it has the original gas tank in it probably crud in it but it idles ok when cold, crappy when warm. i am not happy with the mechanic keeps giving me a bill never fixes the problem |
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| Author: | sandy in BC [ Tue Feb 08, 2011 6:39 pm ] |
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so..........fix the heat riser........or jam it open so it idles nicely warm....and poorly when cold. |
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| Author: | Doc [ Wed Feb 09, 2011 8:33 am ] |
| Post subject: | |
Quote: ... i am not happy with the mechanic keeps giving me a bill never fixes the problem...
Re-check the valve lash adjustment.If the mechanic noted above did the adjustment, it may not be correct. 3 things to note when adjusting solid lifter SL6 valve lash. -The adjustment must be done hot. -Two intake valves are "side-by-side" at the center of the engine. -A little loose is better then a little too tight. If this is a recently rebuilt engine, I would warm it up, retorque the head bolts and then do another lash adjustment, using a different mechanic. DD |
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| Author: | THOR [ Wed Feb 09, 2011 9:42 am ] |
| Post subject: | |
How about carburetor adjustments? Making sure the choke is opening all the way, making sure the idle air mixture screw is adjusted properly... a lean idle mix can be covered up while the engine is cold because of the choke. Once the choke is off, the mix may be too lean, causing the engine to run roughly and "miss". Finding a mechanic nowadays who is knowledgeable with carburetors is becoming increasingly hard to do. Where is this carburetor from? Is it a remanufactured piece from an auto parts store? ~RDE~ |
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| Author: | SlantSixDan [ Wed Feb 09, 2011 10:41 am ] |
| Post subject: | |
Quote: do another lash adjustment, using a different mechanic
Use a 3/8" box-end mechanic or a 3/8" socket mechanic.
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| Author: | Joshie225 [ Wed Feb 09, 2011 11:20 am ] |
| Post subject: | |
I'll go 3rds on the valve lash adjustment. When I got my '66 Barracuda it idled just okey cold and badly when warm. I thought the carburetor was junk until I found the exhaust lash at .010". When the engine warmed up the exhaust lash was inadequate and the compression leaked right out the exhaust valves. Maybe I should do a valve lash video so people can see how easy it is to do. |
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| Author: | Aggressive Ted [ Wed Feb 09, 2011 11:57 am ] |
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Excellent idea! since it keeps coming up. |
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| Author: | Doc [ Wed Feb 09, 2011 1:00 pm ] |
| Post subject: | |
Quote: ... Where is this carburetor from? Is it a remanufactured piece from an auto parts store?
I wonder what type of carb it is, a Carter or a Holley?DD |
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| Author: | vancouver [ Wed Feb 09, 2011 9:11 pm ] |
| Post subject: | |
i will check what kind of carb it is. fiddling with the heat riser did not seem to do anything the valve lash vid would be great! |
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| Author: | Jester [ Wed Feb 09, 2011 10:35 pm ] |
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A valve lash video would be wonderful, but it just takes practise to get a "feel" for a running lash adjustment... My slant idles a bit rough when hot and my bet is on the valve lash being a bit too tight, since it was last adjusted at a luke-warm temperature 
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| Author: | vancouver [ Thu Feb 10, 2011 8:36 am ] |
| Post subject: | |
so the valves should be adjusted to .011 when hot? |
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| Author: | Aggressive Ted [ Thu Feb 10, 2011 8:52 am ] |
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To get a very steady idle, good mileage, etc..... set at .012 on the intake and .022 on the exhaust. Factory specs are .010 and .020. |
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| Author: | vancouver [ Thu Feb 10, 2011 4:54 pm ] |
| Post subject: | |
sweet |
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