GJS
Senior Member
Hi all, I was recently looking at some running videos of my 67 Monaco 500 which is still down in Texas and I thought I'd try and get a jump on some of the issues I noticed.
In the footage taken at the rear of the car near the exhaust you can clearly hear a backfire/pop at random intervals. At first I thought it might be a toast valve but I'd think that the pop would occurr regularly in the cycle of that were the case.
Being that there is no backfire trough the carb, is it possible that the timing chain has enough slop that exhaust valves are opening before the fuel in the chamber has completely burnt off?
The motor has a tad over 100,000 on it and to my knowledge has never had anything done other than hardened valve seats and valves. .. I suppose that this could be a result of crappy work right there but again, it's the irregularity of the backfire that gets me.
Anyway, here's a link to the running video. Join my obsessive preparedness if that's your thing and thanks in advance.
Round back shot starts around 1:59 for the impatient.
In the footage taken at the rear of the car near the exhaust you can clearly hear a backfire/pop at random intervals. At first I thought it might be a toast valve but I'd think that the pop would occurr regularly in the cycle of that were the case.
Being that there is no backfire trough the carb, is it possible that the timing chain has enough slop that exhaust valves are opening before the fuel in the chamber has completely burnt off?
The motor has a tad over 100,000 on it and to my knowledge has never had anything done other than hardened valve seats and valves. .. I suppose that this could be a result of crappy work right there but again, it's the irregularity of the backfire that gets me.
Anyway, here's a link to the running video. Join my obsessive preparedness if that's your thing and thanks in advance.
Round back shot starts around 1:59 for the impatient.