Topic: Engine coming together
in Forum: C3 Engines
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Good afternoon all,
If I may make a suggestion as to the painting of the block after you have the freeze plugs inserted.. I usually paint the block then insert the plugs,however there has been time it was before spraying the block...When this happens is when I coat the freeze plugs with Vaseline and when you are ready to place engine into car you can either wipe out of each plug or wait and when it is started and you season your cam and lifters( assuming you have flat tappet cam/lifters) and the heat of the engine(water temp 190 -200 degrees) will melt the Vaseline and will run off the block..
Good luck and great choice of 062 Vortex heads as opposed to 906's which have a history of cracking in extreme use..
Take care All.
nosal1
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nosal1 said: Good afternoon all,
If I may make a suggestion as to the painting of the block after you have the freeze plugs inserted.. I usually paint the block then insert the plugs,however there has been time it was before spraying the block...When this happens is when I coat the freeze plugs with Vaseline and when you are ready to place engine into car you can either wipe out of each plug or wait and when it is started and you season your cam and lifters( assuming you have flat tappet cam/lifters) and the heat of the engine(water temp 190 -200 degrees) will melt the Vaseline and will run off the block..
Good luck and great choice of 062 Vortex heads as opposed to 906's which have a history of cracking in extreme use..
Take care All.
nosal1
Thanks for the vaseline suggestion -- I think I'll try it when I do my touch up painting. Interesting comment about the 062 vs. 906 heads. I thought the difference was the 906's had a more robust seat on the exhausts to prevent cracking. The stuff I read about them was that they were designed for 3/4 ton and heavier trucks for hauling heavy loads. Some info on the web said they don't flow as well as the 062's because of that. But I hope you're right - I bought a set of 062's from an honest Craigslist seller and they both ended up having cracks in one or two exhaust seats (middle cylinders). One of the heads was junk and the guy gave me my $$ back for that one. The other one had a very small crack in one seat and my engine/head builder had no concerns about fixing it. I got the replacement 062 from a local wholesaler and that one looked great. I hope this plan works!
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Lifetime Member
Looks like it is going to be a nice build. Makes me want to pull my motor back out just so I can paint it again.
Nothing looks better then a nice fresh paint job.
Brian - NCM Lifetime Member
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System
Dewitt radiator and dual electric fans
Borgeson Steering box
Dave the 906 and the 062 Vortex heads are from the same family,however the majority of the 906 heads were cast/made in Mexico and the 062 were stateside cast. We have three sets of 906's sitting on the floor in the machine shop two with a crack between 3 and 5 or 4 and 6 cylinders exhaust valves,typically where the inferior casting is evident.The other head popped it's seat,so we can save it for someone.062's may pop a seat now and again,but not as often as the 906's Good luck on you build and happy motoring...Sal C
Thanks for the info - I think I had heard as well that the 906's were produced in Mexico. Good to know that I've got the better castings.
Got any recommendations for spark plugs for those bad boys? It'll be about 9.4:1 CR. I'm thinking AC Delco's, R44LTS - R42LTS, just not sure which.
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Dave, I have used several plugs over the years (I test a lot of plugs ) and have gone back to the ones that GM has always used ....Go figure that they would know anything..If you are going to run the engine full bore all the time then AC 44T or TS are the ones to use.
A colder plug for high speed and hotter plug for in town with sporadic freeway/highway miles. If you run headers exhaust then Acell #576 (these are shorter plugs for use with Headers) equals the AC 45TS plug and what I use in my Vette and all the 383 Strokers I have built here in the neighborhood.If you have the HEI Chevy distributor(large cap) then set gap at .045,if you use something like Pertronix (a converted points GM distributor) then set the gap at .042..If you have any other queries,please do not hesitate to ask..
Take care........Sal C
Thanks, Sal. I think I'm going to go with AC R44LTS, gapped at .045 -- assuming that's the same thing you're recommending. (LTS = Long tapered seat, Vortecs need the longer reach I guess). That's the same plug recommended for the 330 HP GMPP crate motor with vortecs. Thanks again for the help!
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Dave are the heads on or off the block? Do you have flat top pistons with 2 or 4 eyelids? The LTS plugs are used with recessed pistons..Please check the depth of the plug into the cylinder..You don't want the plug to extend so far into the hole to where the piston slams the plug..The plug is the same as the 44T or TS,however longer designed to go deeper into the cyl. due to recessed top of pistons of late model engines.. Take care.... Sal C
Sal, my heads are on the block already. But I do know that I have slightly recessed pistons -- about 10 cc's or so. They were needed to get my CR down to a reasonable 9.4 or so due to the 64 cc combustion chambers. They also have four valve reliefs. Assuming I'll be OK with the longer (LTS) plugs in that case. Thanks, Dave
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
in Forum: C3 Engines
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