25 BTDC? Sounds like he didn't even connect the dots let alone degree the cam
Man thats a wack load of B4s,you sure on that?
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| Rocker arm clearance https://slantsix.org/forum/viewtopic.php?t=33088 |
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| Author: | 82Stepside [ Thu Jan 01, 2009 3:28 pm ] |
| Post subject: | Rocker arm clearance |
1982 Dodge truck, slant 6, 4 speed manual, 2bbl carb. Quick question, there should be some clearance between the rocker arms and end of the valve stems, correct? I can't seem to get a feeler gauge in there and none of the rocker arms will even wiggle the tiniest bit by hand. If I'm reading my factory service manual correctly, I should be able to get at least an 0.060" gauge in there and I can't. If I am reading this all correctly, how do I go about fixing it? Shims under the rocker arm shaft? Grind down the valve stems? Thicker head gasket? New push rods? Thanks, John |
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| Author: | Shaker223 [ Thu Jan 01, 2009 3:37 pm ] |
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If it is the original motor, it should not need adjustment because it is a hydro motor. |
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| Author: | 82Stepside [ Thu Jan 01, 2009 3:40 pm ] |
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It is the original motor as far as I know. Had it rebuilt a while back - short block only to help save some cash. I know there's no adjustments in the rockers, just thought there should be some clearance there. |
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| Author: | 6shotvanner [ Thu Jan 01, 2009 3:53 pm ] |
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Hyd lifters are 0 lash so unless someting is wrong shouldn't be any gap.Thats all subject to change with deck'd block,shaved head,bum lifters etc. |
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| Author: | THOR [ Thu Jan 01, 2009 3:58 pm ] |
| Post subject: | |
Quote: Hyd lifters are 0 lash so unless someting is wrong shouldn't be any gap.Thats all subject to change with deck'd block,shaved head,bum lifters etc.
Which is exactly why shaving the head/block is a pain for those with the hydro setup. If the lifters aren't allowed the right amount of movement, say good bye to some internals.~THOR~ |
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| Author: | 82Stepside [ Thu Jan 01, 2009 5:59 pm ] |
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OK. Thanks for the info. My FSM is NOT really clear about that. Now to figure out why I have to set my ignition timing at around 25 BTC to get it to run. The guy who rebuild and assembled short block might not have degreed the cam properly. I dunno. I guess I'll have to take the truck to him and see what he thinks. Right now only getting around 12-13 mpg out of it and I know it should do better. |
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| Author: | 6shotvanner [ Thu Jan 01, 2009 6:58 pm ] |
| Post subject: | |
25 BTDC? Sounds like he didn't even connect the dots let alone degree the cam Man thats a wack load of B4s,you sure on that?
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| Author: | 82Stepside [ Thu Jan 01, 2009 7:15 pm ] |
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Quote: 25 BTDC? Sounds like he didn't even connect the dots let alone degree the cam
That's what I thought, although the engine seems to run OK, just uses a lot more gas than I think it should. Heck, I know I can get way better MPG with a 318/727 combo as I got better than that with a 4WD Ramcharger. Man thats a wack load of B4s,you sure on that?I've got one of those timing lights with the adjustable timing and I have to crank it around to 22-25 BTC to get the timing marks to line up. Could the marks on the crank pulley be that far off? |
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| Author: | Force Fed Mopar [ Thu Jan 01, 2009 7:44 pm ] |
| Post subject: | |
Ring on the balancer could've slipped. |
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