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Joined: Oct 2016
Posts: 26
Grease Monkey
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Grease Monkey
Joined: Oct 2016
Posts: 26 |
Does anyone know if this head can have valves seats put in?
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Joined: Apr 2010
Posts: 1,284
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Apr 2010
Posts: 1,284 |
Yes,
Any engine reconditioning shop that works on older engines should be able to replace seats in a Chev 4 head
Regards
Ray
Some say "Street is neat". I prefer "1928 is great" I have documented my 45 years with a 1928 Chev Tourer, from 1973 to 2018, and regulary add other items that I hope are of interest to others. Your comments are most welcome.The story of the Red Chev can be viewed at http://my28chev.blogspot.com/
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
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If you want to install seats for unleaded gas you are wasting your money. 90% of the gas sold in the 1930's did not contain lead. It is not necessary.
Gene Schneider
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Joined: Oct 2016
Posts: 26
Grease Monkey
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OP
Grease Monkey
Joined: Oct 2016
Posts: 26 |
If you want to install seats for unleaded gas you are wasting your money. 90% of the gas sold in the 1930's did not contain lead. It is not necessary. SO are you saying I dont have to add the lead additive to the gas? The reason I was asking about doing this because the head has at sometime "fixed" with different sized valves and the replacement valves dont fit and are sitting low. So the guy I spoke with today suggested putting in valve seat rings, but he wasnt sure that could be done on this year of head. Also Do you know a machine shop in the area that does valve work? And anyone that works on the honeycomb radiators locally? Thanks Barb
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Joined: Sep 2006
Posts: 1,255 Likes: 10
ChatMaster - 1,000
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ChatMaster - 1,000
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The replacement seats are a great fix for this problem and should help the engine breath much better. Earlier in the year I reconditioned a head for a 29 6cyl. I was cautioned to be careful not to cut the seats in too deep because the water jacket is very close and there could be some pitting. I would think the casting on the 28 4cyl is similar.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
If the exhaust valves are ground(valve seats that is) several times the valves will seat too low and valve seats are a fix.
Lead additives are not necessary and do not even contain lead.
The valve spring tension is so low in older engines that lead is of no use. Probably would help in a modern high performance racing engine.
Same for any oil addatives. Modern 10W-30 oil is 1000 times better than the oils available when the car was new and noting needs to be added to the oil.
Gene Schneider
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Joined: May 2002
Posts: 1,213
ChatMaster - 1,000
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ChatMaster - 1,000
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With the original steel the valves are made from,and the fact that they are seating on hot cast iron seats,in particular the exhaust valves,valve seat regression(wear)can and will occur.
As long as the inlet valves don't sit too low below the face of the head,it's only necessary to use valve seat inserts for the exhaust valves,as the inlet valves aren't subjected to the same high temperatures as the exhaust valves.
That's why in the days when these cars were new,it was a common occurrence to take the head off every 2-3,000 miles to re-seat the valves and do a de-carbonising job to the poorer burning nature of the petrol available at the time.
Last edited by CJP'S 29; 11/28/16 02:01 AM.
CJP'S 29
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