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Username Post: Intake manifold gasket?        (Topic#370136)
93headache 
Silver Supporting Member
Posts: 15
93headache
Reg: 07-30-22
11-21-22 11:15 AM - Post#2850316    

1993 Chevy 4.3. Started leaking coolant. Best I can tell, it's coming from the left front corner of the area that the intake connects to the head. It's the area right under where the ground lug is attached to the stud. I will try to add a couple pics. How many hours should it take to replace the gaskets, and use sealer or not?

The pics are sideways.



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Tony1963 
Frequent Contributor
Posts: 1788

Loc: Orlando Florida
Reg: 07-09-18
11-21-22 11:46 AM - Post#2850319    
    In response to 93headache

To remove everything, clean it up, deal with 30 year old bolts and studs, I'd say 4 hours not including cleanup time you might have for parts.

I recommend the black RTV sealer on the ends of the block and the corners where the intake gasket fits.

People fear change because it threatens what they know, or what they claim to know.


 
93headache 
Silver Supporting Member
Posts: 15
93headache
Reg: 07-30-22
11-21-22 11:51 AM - Post#2850320    
    In response to Tony1963

Thank you for the reply. I'm going to start disassembling tomorrow or Wednesday.



 
Tony1963 
Frequent Contributor
Posts: 1788

Loc: Orlando Florida
Reg: 07-09-18
11-21-22 01:54 PM - Post#2850323    
    In response to 93headache

When you remove the intake, have a shop vac ready to remove as much debris from the valley as possible. Use brake parts cleaner to clean up and watch for getting anything metal down the intake runners on the heads.

Good time to also inspect how much carbon buildup that is in the intake runners on the heads. Be careful with shop vac as you don't want to be vacuuming coolant in the shop vac as the coolant passage is right there.

Don't forget to drain 1 to 2 gallons of coolant before doing the job. You will have to decide if an oil change is in order after the job.

People fear change because it threatens what they know, or what they claim to know.


 
93headache 
Silver Supporting Member
Posts: 15
93headache
Reg: 07-30-22
11-22-22 05:59 PM - Post#2850367    
    In response to Tony1963

Got the manifold off today. Looks like I found the leak. Clean up on the heads will be a chore, but worth it in the long run. Looks like a great time to throw valve cover gaskets in, clean up the wiring harness, and other tidying up.



Edited by 93headache on 11-22-22 06:00 PM. Reason for edit: No reason given.

 
CowboyTrukr 
"11th Year" Silver Supporting Member
Posts: 4827
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
11-23-22 11:26 AM - Post#2850389    
    In response to 93headache

Totally agree with that.

Greg

‘01 Silverado 2500HD 8.1/Allison 1000 Xcab/LB
'00 Explorer XLT 4.0 SOHC V6 Auto
'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500 SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
93headache 
Silver Supporting Member
Posts: 15
93headache
Reg: 07-30-22
11-24-22 10:08 AM - Post#2850429    
    In response to Tony1963

Your 4 hour estimate was spot on. The clean up took almost as much time. Here are a few pics during the job. All is good with Lil' Red again.

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