Head gasket sealer on John Deere 750

[oneal hicks]

If it is only a sealer issue all you may need is a simple thin coat of grease on all mating surfaces and a proper torque of the head bolts? This is the Old school method that has worked for years. (We often over think issues)

 

[Page2]

Another good reason why it's not advisable to seek advice on a message board!

 

[Mike1955]

Another good reason why it's not advisable to seek advice on a message board!

I see a lot of good suggestions on here. There are some not so good. And I’m glad I have the knowledge to separate them The good on here far outweighs the bad so I’m staying. It’s always refreshing to learn something

 

[Williy]

I don't know it this was mentioned but anytime you pull
the head toss the old head bolts and replace with new. As
the head is not friendly to the head bolts!

willy

 

[5030]

I don't know it this was mentioned but anytime you pull
the head toss the old head bolts and replace with new. As
the head is not friendly to the head bolts!

willy

That is correct because when you torque the head bolts to spec, the 'stretch' a tad and need to be renewed.

 

[pmsmechanic]

There are many engines where the head bolts do not need to be replaced after a rebuild. Especially older north American engines, Any engine with torque to yield head bolts on the other hand do need to be replaced. They are a one time use only bolt. The service manual for your particular engine will have information on head bolt specs as to whether they can be reused or not.

 

[5030]

Exactly, but then again, new head bolts on any motor are a pretty cheap date.

 

[pmsmechanic]

Exactly, but then again, new head bolts on any motor are a pretty cheap date.

A C series Cummins that I replaced the head on was $16/bolt from the local CaseIH dealer. If I remember correctly there are 26 bolts. Not my definition of a cheap date! And you didn't have any choice either. They were torque to yield head bolts. I could very well have sourced them cheaper somewhere else but I didn't look.

 

[5030]

A C series Cummins that I replaced the head on was $16/bolt from the local CaseIH dealer. If I remember correctly there are 26 bolts. Not my definition of a cheap date! And you didn't have any choice either. They were torque to yield head bolts. I could very well have sourced them cheaper somewhere else but I didn't look.

I tend to buy my torque to yield capscrews from Fastenal or Motion Industries versus a dealer. OEM TTY capscrews tend to have a huge markup when sourced from a dealer. Some stuff is necessary from a dealer, some isn't.

I'm familiar with that engine as the dealer I work at part time the lead tech rebuilt one and I got the dirty job of repairing the muffler which had a stress failure in the case itself. Don't price a new muffler for it, you'll faint. I HT brazed it for the customer and Tigged the stress cracked mount bracket back on. Much, much less expensive than the replacement unit.

OEM parts today are insanely expensive. Some of it is justified but most isn't.

 

[Paul Campanis]

I am very grateful for all of you helping with my tractor. So many of you have been a tremendous blessing. I'm following up on all the advice / input and learning and growing in my mechanical skills. It has been like drinking out of a firehose but I am excited to learn so much. As a charity we do not have the money to hire people for tractor repairs. We have to fix what is broken ourselves. I am following up with all of the advice, buying tools, buying parts and making baby steps and believe that in the end we will have a great working tractor. Thank you for not getting frustrated with me this process. Thank you for sacrificing your time and being generous with your knowledge.