RAWLINGS R30 REBUILD

This engine was sent to us by a client in Australia asking us to "please replace the compression"

No problem.

Her's the engine as we received it, looks brand new, only thing missing is the compression.

First step is to strip it down and clean and check everything to make sure that nothing is missed that needs our attention.

 

Having finally been able to dismantle this blessed English gem we found that there was an inherent problem with the engine. The  conrod was sitting at a very odd angle and had worn the big and little ends very very oval. The crankshaft journal had also suffered from this misalignment and look somewhat like a cotton reel. After discussing these issues with the client the decision was made to go the whole hog so to speak and repair the engine properly.

Here's a photo showing the con-rod's forward lean.

First task is to clean the parts and then we'll make a new crankshaft and while we're at it we'll make it correctly and counter balance it properly.

Here's the new crankshaft blank ready for machining in the big end.

Next step machine in the big end journal, the lube hole and  counter balence.

 

Nicely refitted back into the crankcase and the new con-rod also fitted.

Next step, start on the cylinder liner restoration with new piston etc.

 In the meantime we also took the time to rectify an original design flaw in the back plate department and added a slot to allow easy fitting and removal of this part.

Here's the cylinder liner all nicely relapped true and round with the correct geometry added for better running performance.