core support bolts

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Ken B

Full Access Member
Joined
Sep 18, 2019
Posts
1,106
Reaction score
1,309
Location
indiana
First Name
ken
Truck Year
81
Truck Model
c10
Engine Size
250
Anyone have any tricks/helpful hints on how to get rusted core support bolts out....without a hot wrench...i dont have one. probably installed in 1981 when assembled. BP blaster is soaking.....
 

Scott91370

Full Access Member
Joined
Apr 2, 2018
Posts
938
Reaction score
910
Location
Burleson, Tx
First Name
Scott
Truck Year
1985
Truck Model
Sierra1500
Engine Size
350
If your bolts are like mine (and mine is a 100% Texas truck with no body rust at all) those bolts will be so jacked up they may break. Mine were disintegrated half way through but they did come off without breaking. I would suggest soaking then soaking again and if you have an impact use it. You'll probably want to replace them anyway. If worse comes to worse cut the nut off the bottom.
 

Ken B

Full Access Member
Joined
Sep 18, 2019
Posts
1,106
Reaction score
1,309
Location
indiana
First Name
ken
Truck Year
81
Truck Model
c10
Engine Size
250
Thanks
Soak and re soak and re soak some more is how i got the cab mounting bolts off....i got one core bolt loosen about half way off and now it wont turn either way... so i am walking away and letting things soak. will work on my donor truck for a bit...
 

Camar068

Supporting Member
Supporting Member
Joined
Feb 5, 2014
Posts
4,186
Reaction score
3,068
Location
Kentucky
First Name
David
Truck Year
1986
Truck Model
K10/LM7 5.3/4L60e/np208/3.73/32"
Engine Size
10 yrs Air Force
Seeing as how there's a post about what I want to resolve....

Is there anything to stop the bolts from rusting? If I remember correctly, the top cap on the rubber is cone shaped and I'm guessing holds water. The grade 8 bolts I put in 5 years ago looked pretty bad and was a PITA to get off. I've got new galvanized bolts, but want to take care of this issue once and for all while I'm there. Additional questions/options below.

1. Has anyone put silicon on the top washer to keep water out?

2. Maybe a thick piece of rubber to seal the top?

3. Anyone loaded the complete bolt with Anti-Sieze? Sh|t works good but messy....rather deal with that lol.

Thx In Advance
'Maro
 

Randy and Easton

Full Access Member
Joined
Feb 6, 2021
Posts
891
Reaction score
1,268
Location
North Richland Hills, Texas
First Name
Randy
Truck Year
1976
Truck Model
C-10 LWB
Engine Size
350
We were lucky with ours and lots of soaking Ken and finally came off. New bolts came in out kit with cab supports.

Randy and Easton
 

Attachments

  • C04F52E5-09EC-41E8-86AE-F242C82C431E.jpeg
    C04F52E5-09EC-41E8-86AE-F242C82C431E.jpeg
    189.9 KB · Views: 34

Originalthor

Full Access Member
Joined
Aug 22, 2021
Posts
1,039
Reaction score
3,489
Location
Saskatoon Saskatchewan
First Name
Scott
Truck Year
1989
Truck Model
Suburban
Engine Size
5.7
All my spare rad supports still have all the bolts and mounts in them lol. Can't lose them that way. Just now if I could stop losing the lower parts I'd be good.

With that being said I've used anti sieze on them and it definitely helps alot (only in for 3 years but came out like new).

But if you run electrical fans for some reason it likes to vibrate the nut off and you lose the bottom mount. Only on the passenger side though go figure. Twice I've managed to lose the lower part.
 

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,205
Reaction score
16,099
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
Aunty seeze.
 

Memaloose

Full Access Member
Joined
Dec 2, 2018
Posts
510
Reaction score
1,455
Location
Dolan Springs, AZ
First Name
Tony
Truck Year
1975
Truck Model
K20
Engine Size
350
I agree, antiseize is the best solution I've ever seen or, stainless steel.
I just remove the thermostat housing bolts on my 1975 350, the threads on the bolts were half gone from rust, I'm replacing with stainless steel bolts. The block threads are good, I chased them with a tap.
 

AKguy

Full Access Member
Joined
Feb 16, 2019
Posts
540
Reaction score
892
Location
Alaska
First Name
Randy
Truck Year
1981
Truck Model
K30 Crew Cab Silverado
Engine Size
460
I agree, antiseize is the best solution I've ever seen or, stainless steel.
I just remove the thermostat housing bolts on my 1975 350, the threads on the bolts were half gone from rust, I'm replacing with stainless steel bolts. The block threads are good, I chased them with a tap.
Yep.
 

deucecoupe

Junior Member
Joined
Jun 29, 2022
Posts
16
Reaction score
8
Location
Lake Oswego OR
First Name
Richard
Truck Year
1984
Truck Model
C10
Engine Size
350
Mine were very rusted, and the exposed threads were gone. I soaked them in PB Blaster for days. They finally came off after applying heat to the lower nuts. I installed new ones and used anti-seize. Good luck!!
 

Scott91370

Full Access Member
Joined
Apr 2, 2018
Posts
938
Reaction score
910
Location
Burleson, Tx
First Name
Scott
Truck Year
1985
Truck Model
Sierra1500
Engine Size
350
It's not that mine were siezed, which I guess is most people's problem, they were desintegrating like this:
You must be registered for see images attach
 

Forum statistics

Threads
42,330
Posts
913,821
Members
33,829
Latest member
scawdrey
Top