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05-26-2005, 08:41 AM
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#1 |
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Senior Member
 Join Date: Dec 2003
Location: Valparaiso, In
Posts: 1,114
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Heat Riser knocking
Got what sounds like a knock coming from the heat riser on an 85 truck with a 305 engine. I have sprayed wd40 on it thinking that would help but it still knocks. it seems like it is free but i don't know how it is supposed to work.
At first I thought it was a rod knocking but it is the heat riser. Haven't a clue what causes it and what to do. I am hoping someone on this board has had this happen and knows what to do. I thought about disconnecting it but don't know if that is a good move or not. Any suggestions?
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Phuloi68 Indy survivor Norwood survivor Big Sandy survivor for those who fight for it... F R E E D O M has a price the protected will never know.  |
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05-26-2005, 02:10 PM
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#2 |
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Active Member
Join Date: Mar 2005
Location: Stoughton, WI
Posts: 187
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Is it the vacuum-operated variety? You could disconnect and plug the vacuum source to see if that makes a difference; it's warm enough out now so that it won't take very long for the engine to warm up.
Brad |
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