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#1
09-10-2009, 01:22 PM
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when should I paint my block and heads, before or after assembly?
I'm thinking that there'll be less damage to the engine paint if I wait till it's assembled, but gaskets, etc might get in the way. Also the question about bolt heads tearing up the paint and leaving bare metal spaces for rust to start if the heads are painted before bolting them on.
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#2
09-10-2009, 01:27 PM
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Painting after assembly will provide paint coverage of the gaskets and sealants that may squish out of the joints. I had painted dmy timing cover and water pump prior to installing but ended up going back and painting after assembly to cover the gasket surfaces.
Doug |
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#3
09-10-2009, 02:05 PM
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I prefer to paint mine separately and then assemble - i don't like the look of painted gaskets. Plus it allows me to bake the intake and exhaust manifolds which helps with paint burn-off. Lots of extra work but worth it if you are anal like I am.
__________________
Matt 1962 Grand Prix - Cameo Ivory|389 4sp|One-Owner Survivor 1964 GTO HT - Silvermist Grey|389 3x2s 4spd|A/C|Hurst Wheels|Frame-off|SOLD 1965 GTO Post - Mayfair Maize|421 3x2s TKO600|Pro-Touring| 1966 GTO HT - Barrier Blue|389 3x2s 4spd|Red Fenderliners 2005 GTO Coupe - Yellow Jacket|Magnacharged LS2 6sp|543hp/561tq|SOLD 2006 GTO Coupe - Spice Red|LS2 6sp|20k orig miles |
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#4
09-10-2009, 04:34 PM
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I paint 'em before I assemble them,then I go back after assembly and touch up any unsightly areas as needed.
I have some cradboard templates I made for covering the big open areas that I dont want any paint on (gasket surfaces mostly),this greatly simplifies the process.. Then when it's assembled,I trim any gasket ooze or such and do the touch up work.  Bret P. |
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#5
09-10-2009, 08:08 PM
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I prefer to paint after so it doesnt tear up the paint on the bolts and I like my gaskets painted.
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#6
09-10-2009, 08:58 PM
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I like to do it after assembly. It's just easier but hey do what you want.
__________________
" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
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#7
09-10-2009, 09:15 PM
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I paint the engine bolts seperately myself,I use a very thin coat of paint on them before assembly,and then I put another thicker coat on them when I touch-up the rest of the engine paint after assembly.
Sometimes certain bolts can be a PITA to get covered evenly when the engine is all assembled. IMO it's easier to just touch them up than to paint them on the engine. BP. |
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#8
09-10-2009, 10:50 PM
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I paint after assembly, that's how the factory did it.
__________________
LEAD, FOLLOW, OR GET THE HE!! OUT OF THE WAY!!! HONEST JERRY'S SPEED AND EQUIPMENT
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#9
09-11-2009, 02:32 AM
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I paint before assembly and touch up afterward. Main reason I started painting prior to assembly is I am pretty messy when assembling engines and paint is going to come off any spots that have residue - even a hand print. Then like Bret does, I go back and detail clean and spray any small spots after the engine is together.
__________________
Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon. |
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#10
09-11-2009, 08:23 AM
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2X what Jerry H said.
__________________
Its ok to giggle and snicker, Dont laugh and point |
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#11
09-11-2009, 08:32 AM
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For a "correct" look (restoration), paint entire assembly. For a good "attention to detail" look, paint sub-assemblies. We use a clear paint on bolts and other non-painted areas to prevent rust and oxidation (aluminum).
Jim |
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#12
09-11-2009, 11:07 AM
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I paint before assembly because I only use stainless bolts on the motor.
  ] 
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#13
09-11-2009, 12:36 PM
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Wow, now that is pretty!
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#14
09-11-2009, 03:01 PM
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Whats that giant spring on the alternator for?
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#15
09-11-2009, 03:09 PM
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Quote:
That is part of my alternator relocation bracket. It keeps the alternator way down out of the way. I built that thing a while back when I upgraded to a 140 amp alternator. The bracket is actually mounted to the frame of the car and the spring acts as a tensioner. I have reved it past 6000 rpms and it still stays tight. I can pull the spring loose in about 10 seconds with a mid sized screwdriver and put it back on just as quickly. |
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#16
09-11-2009, 03:10 PM
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WOW those valve covers look great painted up that way! Very vintage cool look!
__________________
Denn die toten reiten schnell More doors = more love!  
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#17
09-11-2009, 03:31 PM
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The paint never blistered on those heads?
__________________
........I'm just learning as I go....... |
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#18
09-11-2009, 04:19 PM
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Quote:
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#19
09-13-2009, 12:13 PM
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I painted everything before I bolted it together.
Reason is, I like contrast. First I painted all the parts that needed painting, then I bolted the whole thing together with stainless steel bolts and washers. I like looking at all the details, but that's personal I guess. I noticed that Doug1 has 2 sending units (I presume they are sending units) on the water cross over of the intake manifold. Why 2? is one for temperature before the thermostat opens and one after? a check to see if the thermostat opens on time? Or is it something else? I will post pics soon of my engine compartment.
__________________
 If you don't like the way I drive, get off the sidewalk.
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#20
09-13-2009, 07:02 PM
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Quote:
BP. |
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