Pulling heads
08-28-2014, 11:34 AM
#11
Ok so I had some time to actually pull one side. The coolant kept on flowing, I think it spilled half of the radiator.
Second thing, is there suppose to be a little bit of oil on the threads? The lq4 block was bored .030 over and there was a little pieces (not many) of metal. I will chase it with a thread chaser and then put some thread sealant if need be when it goes back together. Let me know what you think.
Second thing, is there suppose to be a little bit of oil on the threads? The lq4 block was bored .030 over and there was a little pieces (not many) of metal. I will chase it with a thread chaser and then put some thread sealant if need be when it goes back together. Let me know what you think.
08-28-2014, 11:47 AM
#12
Ok so I had some time to actually pull one side. The coolant kept on flowing, I think it spilled half of the radiator.
Second thing, is there suppose to be a little bit of oil on the threads? The lq4 block was bored .030 over and there was a little pieces (not many) of metal. I will chase it with a thread chaser and then put some thread sealant if need be when it goes back together. Let me know what you think.
Second thing, is there suppose to be a little bit of oil on the threads? The lq4 block was bored .030 over and there was a little pieces (not many) of metal. I will chase it with a thread chaser and then put some thread sealant if need be when it goes back together. Let me know what you think.
08-28-2014, 09:54 PM
#14
TECH Fanatic
Don't use thread sealant in the head bolt holes, it will affect the torque limits of the bolts and block.
Oil on the threads happens normally, a little bit will seep around the head gasket and into the bolt wells, then more will get spread when you loosen the head.
Oil on the threads happens normally, a little bit will seep around the head gasket and into the bolt wells, then more will get spread when you loosen the head.
08-29-2014, 05:58 PM
#18
TECH Fanatic
Also when reinstalling the heads, make sure you follow the torque sequence and stages to a T. If you happen to tighten the wrong bolt in the sequence (or the right one to the wrong spec) you can potentially cause the crush layers in the head gasket to develop a wrinkle- bad juju.
08-29-2014, 09:33 PM
#19
whenever I pull a set of heads off of a working/running engine, I use a shop vac to suck out all of the coolant.
I always pull the largest hose off of the water pump first with the shop vac already going, then the heater hoses. After that the radiator and water pump can be pulled with out spilling a drop.
When the water pump is pulled, put a suction on the lower side, . . . this clears the coolant from the heads. Keeps most of the water out of the bolt holes for the heads.
If you don't have tap to chase the head bolts with, use a stock head bolt, and grind both sides down like a make shift tap.
I have reused a set of stock 5.3/5.7 MLS head gaskets and the stock TTY head bolts, but I do not recommend it.
I always pull the largest hose off of the water pump first with the shop vac already going, then the heater hoses. After that the radiator and water pump can be pulled with out spilling a drop.
When the water pump is pulled, put a suction on the lower side, . . . this clears the coolant from the heads. Keeps most of the water out of the bolt holes for the heads.
If you don't have tap to chase the head bolts with, use a stock head bolt, and grind both sides down like a make shift tap.
I have reused a set of stock 5.3/5.7 MLS head gaskets and the stock TTY head bolts, but I do not recommend it.