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Title: Heads Post by: fcvan on August 13, 2002, 12:21:44 PM I was wondering if anyone can help me, I have a 161 red motor and I would like to put an unleaded converted head on it, I can get a 186 head which has already had the conversion but will it bolt straight on.
Title: Re: Heads Post by: Effie C on August 13, 2002, 07:01:02 PM G'Day FC Van
A red is a red, it should bolt straight on, with possible slight increase in Compression ratio as the 161 was a low compression motor ,in relation to the 186 that is ;) Now if it was an almighty, all conquering grey motor it may be different ::) John M Title: Re: Heads Post by: The Smoo'er on August 14, 2002, 03:45:52 AM Matey, Before you bolt anything on which will ultimately run on unleaded, I would strongly recommend in getting the exhuast valve seat's hardened, otherwise you'll be coughing up heaps money a few miles down the track with valves pulled up into the head and paying a bit more. Hope this helps, :) Smoo Title: Re: Heads Post by: The Smoo'er on August 14, 2002, 03:52:12 AM My stuff up, I didn't read the word converted in you original sentence . Good luck. Smoo Title: Re: Heads Post by: Graeme McKie on August 12, 2004, 01:35:02 AM 149 and 161 engines had closed chamber cylinder heads. They were high compression engines. Look at the back of the head near the heater tap outlet and their should be a L stamped for low compression or H for high compression if you want to make sure. The chamber size is what affects compression ratio.
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