Hi Rebuild done, 280miles done, and just had a tune up. Tuneup helped a lot, especially at ideal and low revs. I have dual 34ict empi' sand the ideal jet was too small (52). The tuning guy took this out to 55 and that improved a lot. But one thing he noticed was that the left side of the engine was hotter than the right. The carb on the left was bubbling fuel back down into the manifold once the engine was turned off, which was why warm starts can be a bit tricky. Using a temperature laser, the left was 15 to 20 deg hotter! It his does not sound normal to me, any ideas? Or is it possible for the left to be hotter? Van runs really well (especially after a tuneup), so I'm not sure what to do?
Brake servo for power assisted brakes. It relies on a vacuum provided by one side of the engine only. If the vacuum pipe is leaking air, it would run lean on one side I think.
Except the servo vacuum take off is from both sides via the balance pipe. I'd go for slightly out of balance.
Yea the linkage between the two, if one side leads the other even by a fraction the leading side runs hot.
Don't believe there is any pipes that serves the servo. In fact, I don't think it has a servo! I'm thinking something more sinister So, out with the engine! Will report back later.
If it's a T1 engine with an aftermarket fan housing, the vanes inside that are supposed to direct the air flow have been known to fall off and block the air flow to the cylinders. @Purplepantyman had this problem. His did have an enormous amount of vibration, but which came first - the chicken or the egg?
This doesn't happen to OG fan housings, is yours an aftermarket one? If you have twin ICT's it may well be as they don't fit with an OG housing without judicous use of a hickory handled adjustment tool.
It is the original fan housing. And the ICT Carbs fit fine (they are the small 34's). But I did have a small indecent with the foam seal that runs round the tinware. The end behind the fan got caught up in the fan itself! Made a horrible noise, and then pinged out! Initially, that was all It did, and it seemed fine, but now I thinking that either a piece of foam has lodged itself into the tinware, or the lever that controls the air vanes has been pulled off. I'm going to try a visual inspection tonight.
OK... I found a piece of foam still sitting in the fan! (Photo to follow).. I'm hoping its all complete (although it looks like a bit has worn away), and this would explain the temperature difference. I'm thinking that because the left hand side of the engine is both further away from the fan, and the oil cooler sits between them, that if there is any inefficiency in the cooling, the left side will suffer more than the right. Makes sense? Right?
