75k different pushrod length side to side??
#1
75k different pushrod length side to side??
Assembled my engine, went to start it and it is only running on 4. The drivers side is firing but nothing on the passenger. So checked fuel and spark, getting both. Check compression and none. I loosened the rocker arms and got compression, so I'm thinking pushrods are too long and leaving the valves open. Stupid me for not measuring both or all pushrod lengths.
I am running morel link bars with stock ls rockers and pedals. I came up with 7.325 pushrods.....that us 75k less than the 7.40 ones on the drivers side.
Questions:
1. Am I doing it wrong. I set to zero lash. Then I look for 1.5 turns more
2. What would cause the difference? Milled different? Valve height different?
Thanks
I am running morel link bars with stock ls rockers and pedals. I came up with 7.325 pushrods.....that us 75k less than the 7.40 ones on the drivers side.
Questions:
1. Am I doing it wrong. I set to zero lash. Then I look for 1.5 turns more
2. What would cause the difference? Milled different? Valve height different?
Thanks
#3
TECH Addict
iTrader: (2)
I understand the 7.40 are working on the driver's side, but did you measure the driver's side? If so, how much preload is there on the driver's side with the 7.40s?
Edit: If the lifters are Morel 5206, the preload window is from 0.030" to 0.050." It is often necessary to order custom length pushrods to accommodate the narrow window.
http://johncalliesinc.com/pdf/Adjust...licLifters.pdf
Edit: If the lifters are Morel 5206, the preload window is from 0.030" to 0.050." It is often necessary to order custom length pushrods to accommodate the narrow window.
http://johncalliesinc.com/pdf/Adjust...licLifters.pdf
Last edited by Darkman; 04-04-2014 at 09:21 PM.
#4
Thanks for the info. Yes they are. I'm still shocked that the difference between the two is 75k. I guess it could be 30-75 as that is the travel plus expansion but I am still shocked at this. I may be finding out that the 7:40 is also too long once I get the engine running at full WOT.